/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=BIGGEST --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/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:29:07,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:29:07,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:29:07,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:29:07,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:29:07,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:29:07,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:29:07,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:29:07,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:29:07,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:29:07,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:29:07,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:29:07,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:29:07,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:29:07,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:29:07,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:29:07,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:29:07,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:29:07,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:29:07,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:29:07,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:29:07,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:29:07,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:29:07,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:29:07,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:29:07,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:29:07,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:29:07,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:29:07,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:29:07,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:29:07,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:29:07,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:29:07,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:29:07,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:29:07,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:29:07,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:29:07,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:29:07,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:29:07,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:29:07,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:29:07,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:29:07,274 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 [2020-10-12 19:29:07,316 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:29:07,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:29:07,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:29:07,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:29:07,319 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:29:07,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:29:07,320 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:29:07,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:29:07,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:29:07,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:29:07,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:29:07,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:29:07,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:29:07,323 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:29:07,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:29:07,323 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:29:07,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:29:07,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:29:07,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:29:07,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:29:07,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:29:07,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:29:07,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:29:07,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:29:07,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:29:07,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:29:07,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:29:07,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:29:07,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:29:07,326 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:29:07,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:29:07,643 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:29:07,646 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:29:07,648 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:29:07,648 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:29:07,649 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-12 19:29:07,727 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d6c1b025/081f0b41124543c6998fc18485c54a64/FLAG84485f5fe [2020-10-12 19:29:08,273 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:29:08,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-12 19:29:08,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d6c1b025/081f0b41124543c6998fc18485c54a64/FLAG84485f5fe [2020-10-12 19:29:08,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d6c1b025/081f0b41124543c6998fc18485c54a64 [2020-10-12 19:29:08,572 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:29:08,574 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:29:08,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:29:08,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:29:08,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:29:08,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:29:08" (1/1) ... [2020-10-12 19:29:08,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@684fb7f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:08, skipping insertion in model container [2020-10-12 19:29:08,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:29:08" (1/1) ... [2020-10-12 19:29:08,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:29:08,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:29:08,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:29:08,918 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:29:09,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:29:09,131 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:29:09,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:09 WrapperNode [2020-10-12 19:29:09,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:29:09,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:29:09,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:29:09,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:29:09,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:09" (1/1) ... [2020-10-12 19:29:09,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:09" (1/1) ... [2020-10-12 19:29:09,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:09" (1/1) ... [2020-10-12 19:29:09,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:09" (1/1) ... [2020-10-12 19:29:09,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:09" (1/1) ... [2020-10-12 19:29:09,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:09" (1/1) ... [2020-10-12 19:29:09,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:09" (1/1) ... [2020-10-12 19:29:09,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:29:09,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:29:09,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:29:09,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:29:09,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:09" (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 [2020-10-12 19:29:09,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:29:09,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:29:09,258 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:29:09,258 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:29:09,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:29:09,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:29:09,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:29:09,259 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:29:09,259 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:29:09,259 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:29:09,259 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:29:09,259 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:29:09,260 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:29:09,260 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:29:09,260 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:29:09,260 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:29:09,260 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:29:09,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:29:09,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:29:09,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:29:09,887 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:29:09,887 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:29:09,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:29:09 BoogieIcfgContainer [2020-10-12 19:29:09,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:29:09,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:29:09,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:29:09,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:29:09,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:29:08" (1/3) ... [2020-10-12 19:29:09,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b4bcbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:29:09, skipping insertion in model container [2020-10-12 19:29:09,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:09" (2/3) ... [2020-10-12 19:29:09,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b4bcbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:29:09, skipping insertion in model container [2020-10-12 19:29:09,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:29:09" (3/3) ... [2020-10-12 19:29:09,901 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-12 19:29:09,912 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:29:09,920 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-12 19:29:09,935 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-12 19:29:09,962 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:29:09,962 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:29:09,963 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:29:09,963 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:29:09,963 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:29:09,963 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:29:09,964 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:29:09,964 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:29:09,987 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states. [2020-10-12 19:29:09,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 19:29:09,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:09,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:09,997 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:10,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:10,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1391070789, now seen corresponding path program 1 times [2020-10-12 19:29:10,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:10,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433086842] [2020-10-12 19:29:10,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:10,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:10,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:10,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:10,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:11,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:11,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:14,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:14,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:14,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:15,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:15,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 19:29:15,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:29:15,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 19:29:15,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:15,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:29:15,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 19:29:15,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 19:29:15,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:29:15,546 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 19:29:15,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:15,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:15,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:15,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:15,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:15,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:29:15,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:15,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:15,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:15,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:15,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:15,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433086842] [2020-10-12 19:29:15,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:29:15,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:29:15,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294764605] [2020-10-12 19:29:15,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:29:15,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:15,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:29:15,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:29:15,610 INFO L87 Difference]: Start difference. First operand 111 states. Second operand 7 states. [2020-10-12 19:29:15,801 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-12 19:29:16,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:16,961 INFO L93 Difference]: Finished difference Result 580 states and 919 transitions. [2020-10-12 19:29:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:29:16,963 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-12 19:29:16,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:16,984 INFO L225 Difference]: With dead ends: 580 [2020-10-12 19:29:16,984 INFO L226 Difference]: Without dead ends: 468 [2020-10-12 19:29:16,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:29:17,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-12 19:29:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 226. [2020-10-12 19:29:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-12 19:29:17,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 323 transitions. [2020-10-12 19:29:17,063 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 323 transitions. Word has length 52 [2020-10-12 19:29:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:17,063 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 323 transitions. [2020-10-12 19:29:17,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:29:17,064 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 323 transitions. [2020-10-12 19:29:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 19:29:17,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:17,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:17,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:29:17,067 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:17,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:17,068 INFO L82 PathProgramCache]: Analyzing trace with hash -422265318, now seen corresponding path program 1 times [2020-10-12 19:29:17,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:17,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693668961] [2020-10-12 19:29:17,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:17,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:17,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:17,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:17,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:17,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:17,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:18,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:22,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:22,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 19:29:22,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:29:22,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:29:22,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:29:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:29:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 19:29:22,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:29:22,420 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-10-12 19:29:22,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:22,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:22,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:22,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:22,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:22,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:29:22,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:22,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:22,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:22,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:22,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:29:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:22,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693668961] [2020-10-12 19:29:22,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:29:22,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:29:22,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956286311] [2020-10-12 19:29:22,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:29:22,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:22,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:29:22,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:29:22,637 INFO L87 Difference]: Start difference. First operand 226 states and 323 transitions. Second operand 12 states. [2020-10-12 19:29:22,843 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-12 19:29:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:25,469 INFO L93 Difference]: Finished difference Result 2005 states and 3009 transitions. [2020-10-12 19:29:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 19:29:25,470 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-12 19:29:25,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:25,481 INFO L225 Difference]: With dead ends: 2005 [2020-10-12 19:29:25,481 INFO L226 Difference]: Without dead ends: 1839 [2020-10-12 19:29:25,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=533, Invalid=2329, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 19:29:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2020-10-12 19:29:25,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 399. [2020-10-12 19:29:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-12 19:29:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 579 transitions. [2020-10-12 19:29:25,550 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 579 transitions. Word has length 53 [2020-10-12 19:29:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:25,551 INFO L479 AbstractCegarLoop]: Abstraction has 399 states and 579 transitions. [2020-10-12 19:29:25,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:29:25,551 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 579 transitions. [2020-10-12 19:29:25,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:29:25,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:25,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:25,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:29:25,555 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:25,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:25,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1704419941, now seen corresponding path program 1 times [2020-10-12 19:29:25,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:25,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724058390] [2020-10-12 19:29:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:25,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:25,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:25,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:25,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:25,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:26,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:26,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:26,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:26,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:27,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:27,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:30,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:30,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:29:30,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:29:30,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:29:30,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:30,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 19:29:30,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:29:30,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 19:29:30,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:29:30,918 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2020-10-12 19:29:31,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:31,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:31,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:31,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:31,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:31,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:29:31,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:31,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:31,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:31,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:31,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:31,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724058390] [2020-10-12 19:29:31,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:29:31,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:29:31,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923708103] [2020-10-12 19:29:31,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 19:29:31,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:31,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 19:29:31,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:29:31,258 INFO L87 Difference]: Start difference. First operand 399 states and 579 transitions. Second operand 14 states. [2020-10-12 19:29:31,469 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-12 19:29:32,118 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-12 19:29:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:34,829 INFO L93 Difference]: Finished difference Result 2633 states and 3966 transitions. [2020-10-12 19:29:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:29:34,830 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-12 19:29:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:34,846 INFO L225 Difference]: With dead ends: 2633 [2020-10-12 19:29:34,847 INFO L226 Difference]: Without dead ends: 2359 [2020-10-12 19:29:34,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2020-10-12 19:29:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2020-10-12 19:29:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 419. [2020-10-12 19:29:34,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-10-12 19:29:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 601 transitions. [2020-10-12 19:29:34,947 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 601 transitions. Word has length 54 [2020-10-12 19:29:34,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:34,949 INFO L479 AbstractCegarLoop]: Abstraction has 419 states and 601 transitions. [2020-10-12 19:29:34,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 19:29:34,950 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 601 transitions. [2020-10-12 19:29:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:29:34,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:34,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:34,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:29:34,962 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:34,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:34,963 INFO L82 PathProgramCache]: Analyzing trace with hash 827063108, now seen corresponding path program 1 times [2020-10-12 19:29:34,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:34,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223112853] [2020-10-12 19:29:34,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:35,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:35,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:35,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:35,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:35,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:35,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:36,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:36,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:29:36,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:29:36,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1947 [2020-10-12 19:29:36,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:36,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:29:36,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:29:36,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 19:29:36,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:37,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:37,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:37,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:37,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:37,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:37,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:29:37,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:37,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:37,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:37,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:37,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:37,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223112853] [2020-10-12 19:29:37,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:29:37,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:29:37,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514692203] [2020-10-12 19:29:37,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:29:37,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:37,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:29:37,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:29:37,097 INFO L87 Difference]: Start difference. First operand 419 states and 601 transitions. Second operand 7 states. [2020-10-12 19:29:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:38,322 INFO L93 Difference]: Finished difference Result 1452 states and 2179 transitions. [2020-10-12 19:29:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:29:38,322 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-12 19:29:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:38,336 INFO L225 Difference]: With dead ends: 1452 [2020-10-12 19:29:38,336 INFO L226 Difference]: Without dead ends: 1251 [2020-10-12 19:29:38,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:29:38,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2020-10-12 19:29:38,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 524. [2020-10-12 19:29:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-10-12 19:29:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 761 transitions. [2020-10-12 19:29:38,417 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 761 transitions. Word has length 54 [2020-10-12 19:29:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:38,418 INFO L479 AbstractCegarLoop]: Abstraction has 524 states and 761 transitions. [2020-10-12 19:29:38,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:29:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 761 transitions. [2020-10-12 19:29:38,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 19:29:38,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:38,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:38,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:29:38,420 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:38,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2099495156, now seen corresponding path program 1 times [2020-10-12 19:29:38,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:38,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981749555] [2020-10-12 19:29:38,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:38,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:38,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:38,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:38,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:38,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:38,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:38,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:43,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:43,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 19:29:43,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:29:43,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:29:43,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:43,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:29:43,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:29:43,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 19:29:43,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:29:43,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:43,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:43,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:43,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:43,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:43,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:29:43,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:43,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:43,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981749555] [2020-10-12 19:29:43,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:29:43,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:29:43,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754206301] [2020-10-12 19:29:43,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:29:43,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:43,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:29:43,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:29:43,786 INFO L87 Difference]: Start difference. First operand 524 states and 761 transitions. Second operand 12 states. [2020-10-12 19:29:43,949 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 19:29:46,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:46,118 INFO L93 Difference]: Finished difference Result 2287 states and 3398 transitions. [2020-10-12 19:29:46,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 19:29:46,119 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-12 19:29:46,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:46,129 INFO L225 Difference]: With dead ends: 2287 [2020-10-12 19:29:46,129 INFO L226 Difference]: Without dead ends: 2024 [2020-10-12 19:29:46,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 19:29:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2020-10-12 19:29:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 524. [2020-10-12 19:29:46,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-10-12 19:29:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 759 transitions. [2020-10-12 19:29:46,225 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 759 transitions. Word has length 55 [2020-10-12 19:29:46,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:46,225 INFO L479 AbstractCegarLoop]: Abstraction has 524 states and 759 transitions. [2020-10-12 19:29:46,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:29:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 759 transitions. [2020-10-12 19:29:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 19:29:46,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:46,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:46,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:29:46,227 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash 903268761, now seen corresponding path program 1 times [2020-10-12 19:29:46,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:46,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452339270] [2020-10-12 19:29:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:46,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:46,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:46,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:46,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:46,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:46,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:46,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:51,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:51,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 19:29:51,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:29:51,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4977 [2020-10-12 19:29:51,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:51,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:29:51,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:29:51,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 19:29:51,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:51,604 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 19:29:51,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:51,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:51,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:51,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:51,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:51,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:29:51,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:51,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:51,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:51,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:51,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:29:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:51,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452339270] [2020-10-12 19:29:51,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:29:51,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:29:51,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928320510] [2020-10-12 19:29:51,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:29:51,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:51,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:29:51,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:29:51,660 INFO L87 Difference]: Start difference. First operand 524 states and 759 transitions. Second operand 11 states. [2020-10-12 19:29:51,853 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-12 19:29:54,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:54,241 INFO L93 Difference]: Finished difference Result 1780 states and 2656 transitions. [2020-10-12 19:29:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:29:54,242 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-12 19:29:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:54,250 INFO L225 Difference]: With dead ends: 1780 [2020-10-12 19:29:54,250 INFO L226 Difference]: Without dead ends: 1501 [2020-10-12 19:29:54,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2020-10-12 19:29:54,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2020-10-12 19:29:54,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 521. [2020-10-12 19:29:54,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-12 19:29:54,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 755 transitions. [2020-10-12 19:29:54,335 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 755 transitions. Word has length 55 [2020-10-12 19:29:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:54,336 INFO L479 AbstractCegarLoop]: Abstraction has 521 states and 755 transitions. [2020-10-12 19:29:54,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:29:54,336 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 755 transitions. [2020-10-12 19:29:54,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 19:29:54,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:54,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:54,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:29:54,337 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:54,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:54,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1678719651, now seen corresponding path program 1 times [2020-10-12 19:29:54,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:54,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144542489] [2020-10-12 19:29:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:54,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:54,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:54,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:54,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:54,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:54,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:54,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:54,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:54,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:55,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:59,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:59,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 19:29:59,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:29:59,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:29:59,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:59,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 19:29:59,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 19:29:59,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 19:29:59,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:59,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:59,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:59,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:59,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:59,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:59,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:29:59,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:59,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:59,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144542489] [2020-10-12 19:29:59,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:29:59,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:29:59,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701407265] [2020-10-12 19:29:59,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 19:29:59,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:59,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 19:29:59,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:29:59,735 INFO L87 Difference]: Start difference. First operand 521 states and 755 transitions. Second operand 14 states. [2020-10-12 19:30:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:02,818 INFO L93 Difference]: Finished difference Result 2117 states and 3137 transitions. [2020-10-12 19:30:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 19:30:02,819 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-12 19:30:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:02,826 INFO L225 Difference]: With dead ends: 2117 [2020-10-12 19:30:02,827 INFO L226 Difference]: Without dead ends: 1843 [2020-10-12 19:30:02,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=325, Invalid=1397, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 19:30:02,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2020-10-12 19:30:02,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 524. [2020-10-12 19:30:02,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-10-12 19:30:02,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 757 transitions. [2020-10-12 19:30:02,921 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 757 transitions. Word has length 55 [2020-10-12 19:30:02,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:02,921 INFO L479 AbstractCegarLoop]: Abstraction has 524 states and 757 transitions. [2020-10-12 19:30:02,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 19:30:02,921 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 757 transitions. [2020-10-12 19:30:02,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 19:30:02,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:02,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:02,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:30:02,922 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:02,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:02,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1771665106, now seen corresponding path program 1 times [2020-10-12 19:30:02,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:02,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296617502] [2020-10-12 19:30:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:02,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:02,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:02,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:06,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:06,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 19:30:06,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:30:06,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3737 [2020-10-12 19:30:06,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:06,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 19:30:06,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:30:06,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 19:30:06,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:07,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:07,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:07,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:07,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:07,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:07,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:30:07,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:07,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:30:07,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:07,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:30:07,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:07,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296617502] [2020-10-12 19:30:07,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:07,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:30:07,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40929035] [2020-10-12 19:30:07,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 19:30:07,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:07,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 19:30:07,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:30:07,050 INFO L87 Difference]: Start difference. First operand 524 states and 757 transitions. Second operand 14 states. [2020-10-12 19:30:07,391 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 123 [2020-10-12 19:30:10,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:10,337 INFO L93 Difference]: Finished difference Result 1966 states and 2938 transitions. [2020-10-12 19:30:10,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 19:30:10,338 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-12 19:30:10,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:10,345 INFO L225 Difference]: With dead ends: 1966 [2020-10-12 19:30:10,345 INFO L226 Difference]: Without dead ends: 1779 [2020-10-12 19:30:10,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 19:30:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2020-10-12 19:30:10,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 539. [2020-10-12 19:30:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-10-12 19:30:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 775 transitions. [2020-10-12 19:30:10,448 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 775 transitions. Word has length 55 [2020-10-12 19:30:10,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:10,449 INFO L479 AbstractCegarLoop]: Abstraction has 539 states and 775 transitions. [2020-10-12 19:30:10,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 19:30:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 775 transitions. [2020-10-12 19:30:10,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:30:10,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:10,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:10,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:30:10,450 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:10,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:10,451 INFO L82 PathProgramCache]: Analyzing trace with hash -745386828, now seen corresponding path program 1 times [2020-10-12 19:30:10,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:10,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519328960] [2020-10-12 19:30:10,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:10,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:10,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:10,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:10,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:10,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:10,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:30:10,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:30:10,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-12 19:30:10,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:10,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:30:10,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:30:10,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 19:30:10,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:11,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:11,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:11,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:11,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:11,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:11,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:30:11,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:11,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:30:11,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:11,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:30:11,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:11,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519328960] [2020-10-12 19:30:11,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:11,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:30:11,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111651705] [2020-10-12 19:30:11,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:30:11,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:11,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:30:11,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:30:11,101 INFO L87 Difference]: Start difference. First operand 539 states and 775 transitions. Second operand 6 states. [2020-10-12 19:30:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:12,148 INFO L93 Difference]: Finished difference Result 2626 states and 4002 transitions. [2020-10-12 19:30:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:30:12,148 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-12 19:30:12,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:12,158 INFO L225 Difference]: With dead ends: 2626 [2020-10-12 19:30:12,158 INFO L226 Difference]: Without dead ends: 2311 [2020-10-12 19:30:12,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:30:12,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2020-10-12 19:30:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 918. [2020-10-12 19:30:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2020-10-12 19:30:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1338 transitions. [2020-10-12 19:30:12,355 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1338 transitions. Word has length 56 [2020-10-12 19:30:12,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:12,356 INFO L479 AbstractCegarLoop]: Abstraction has 918 states and 1338 transitions. [2020-10-12 19:30:12,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:30:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1338 transitions. [2020-10-12 19:30:12,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:30:12,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:12,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:12,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:30:12,358 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:12,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:12,358 INFO L82 PathProgramCache]: Analyzing trace with hash 2043799404, now seen corresponding path program 1 times [2020-10-12 19:30:12,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:12,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271372921] [2020-10-12 19:30:12,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:12,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:12,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:12,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:12,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:12,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:12,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:12,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:12,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:13,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:16,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:16,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:16,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:17,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:17,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:30:17,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 19:30:17,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:30:17,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:30:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:30:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:30:17,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:17,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:17,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:17,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:17,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:17,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:17,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:30:17,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:17,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:30:17,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:17,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:30:17,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:17,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271372921] [2020-10-12 19:30:17,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:17,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:30:17,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33940516] [2020-10-12 19:30:17,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:30:17,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:17,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:30:17,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:30:17,750 INFO L87 Difference]: Start difference. First operand 918 states and 1338 transitions. Second operand 15 states. [2020-10-12 19:30:18,091 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 121 [2020-10-12 19:30:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:23,628 INFO L93 Difference]: Finished difference Result 5071 states and 7496 transitions. [2020-10-12 19:30:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 19:30:23,629 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-10-12 19:30:23,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:23,644 INFO L225 Difference]: With dead ends: 5071 [2020-10-12 19:30:23,644 INFO L226 Difference]: Without dead ends: 4340 [2020-10-12 19:30:23,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=840, Invalid=3320, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 19:30:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4340 states. [2020-10-12 19:30:23,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4340 to 707. [2020-10-12 19:30:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2020-10-12 19:30:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1018 transitions. [2020-10-12 19:30:23,835 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1018 transitions. Word has length 57 [2020-10-12 19:30:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:23,835 INFO L479 AbstractCegarLoop]: Abstraction has 707 states and 1018 transitions. [2020-10-12 19:30:23,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:30:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1018 transitions. [2020-10-12 19:30:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:30:23,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:23,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:23,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:30:23,837 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:23,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1800317147, now seen corresponding path program 1 times [2020-10-12 19:30:23,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:23,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160919152] [2020-10-12 19:30:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:23,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:23,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:23,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:24,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:24,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:30:24,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:30:24,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-12 19:30:24,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:24,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:30:24,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:30:24,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 19:30:24,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:24,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:24,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:24,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:24,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:24,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:24,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:30:24,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:24,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:30:24,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:24,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:30:24,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:24,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160919152] [2020-10-12 19:30:24,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:24,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:30:24,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938899546] [2020-10-12 19:30:24,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:30:24,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:24,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:30:24,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:30:24,432 INFO L87 Difference]: Start difference. First operand 707 states and 1018 transitions. Second operand 6 states. [2020-10-12 19:30:24,563 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 19:30:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:25,180 INFO L93 Difference]: Finished difference Result 1049 states and 1532 transitions. [2020-10-12 19:30:25,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:30:25,180 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-12 19:30:25,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:25,182 INFO L225 Difference]: With dead ends: 1049 [2020-10-12 19:30:25,182 INFO L226 Difference]: Without dead ends: 474 [2020-10-12 19:30:25,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:30:25,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-12 19:30:25,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 469. [2020-10-12 19:30:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-12 19:30:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 669 transitions. [2020-10-12 19:30:25,290 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 669 transitions. Word has length 57 [2020-10-12 19:30:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:25,290 INFO L479 AbstractCegarLoop]: Abstraction has 469 states and 669 transitions. [2020-10-12 19:30:25,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:30:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 669 transitions. [2020-10-12 19:30:25,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:30:25,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:25,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:25,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:30:25,292 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:25,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:25,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1360438413, now seen corresponding path program 1 times [2020-10-12 19:30:25,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:25,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741399508] [2020-10-12 19:30:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:25,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:25,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:25,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:25,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:25,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:26,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:26,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:28,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:28,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:30:28,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:30:28,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3020 [2020-10-12 19:30:28,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:28,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:30:28,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:30:28,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:30:28,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:28,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:28,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:28,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:28,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:28,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:28,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:30:28,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:28,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:30:28,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:28,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:30:28,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:28,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741399508] [2020-10-12 19:30:28,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:28,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:30:28,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544158836] [2020-10-12 19:30:28,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:30:28,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:28,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:30:28,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:30:28,723 INFO L87 Difference]: Start difference. First operand 469 states and 669 transitions. Second operand 15 states. [2020-10-12 19:30:28,912 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-12 19:30:30,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:30,853 INFO L93 Difference]: Finished difference Result 1318 states and 1950 transitions. [2020-10-12 19:30:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 19:30:30,854 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-10-12 19:30:30,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:30,858 INFO L225 Difference]: With dead ends: 1318 [2020-10-12 19:30:30,858 INFO L226 Difference]: Without dead ends: 958 [2020-10-12 19:30:30,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2020-10-12 19:30:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2020-10-12 19:30:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 463. [2020-10-12 19:30:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2020-10-12 19:30:30,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 661 transitions. [2020-10-12 19:30:30,970 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 661 transitions. Word has length 57 [2020-10-12 19:30:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:30,970 INFO L479 AbstractCegarLoop]: Abstraction has 463 states and 661 transitions. [2020-10-12 19:30:30,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:30:30,971 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 661 transitions. [2020-10-12 19:30:30,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:30:30,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:30,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:30,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:30:30,972 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:30,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:30,972 INFO L82 PathProgramCache]: Analyzing trace with hash 465400230, now seen corresponding path program 1 times [2020-10-12 19:30:30,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:30,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670065667] [2020-10-12 19:30:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:31,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:31,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:31,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:31,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:31,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:31,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:32,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:32,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:32,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:32,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:32,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:32,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:35,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:35,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:30:35,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 19:30:35,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4740 [2020-10-12 19:30:35,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:35,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 19:30:35,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:30:35,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:30:35,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:36,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:36,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:36,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:36,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:36,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:36,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:30:36,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:36,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:30:36,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:36,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:30:36,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:36,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670065667] [2020-10-12 19:30:36,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:36,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-12 19:30:36,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35650132] [2020-10-12 19:30:36,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 19:30:36,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:36,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 19:30:36,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:30:36,136 INFO L87 Difference]: Start difference. First operand 463 states and 661 transitions. Second operand 14 states. [2020-10-12 19:30:36,328 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 19:30:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:39,510 INFO L93 Difference]: Finished difference Result 3019 states and 4500 transitions. [2020-10-12 19:30:39,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 19:30:39,510 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-12 19:30:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:39,519 INFO L225 Difference]: With dead ends: 3019 [2020-10-12 19:30:39,519 INFO L226 Difference]: Without dead ends: 2670 [2020-10-12 19:30:39,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=323, Invalid=799, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 19:30:39,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2020-10-12 19:30:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 495. [2020-10-12 19:30:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-12 19:30:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 701 transitions. [2020-10-12 19:30:39,682 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 701 transitions. Word has length 57 [2020-10-12 19:30:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:39,682 INFO L479 AbstractCegarLoop]: Abstraction has 495 states and 701 transitions. [2020-10-12 19:30:39,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 19:30:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 701 transitions. [2020-10-12 19:30:39,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:30:39,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:39,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:39,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:30:39,684 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:39,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:39,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1584270252, now seen corresponding path program 1 times [2020-10-12 19:30:39,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:39,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790104489] [2020-10-12 19:30:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:39,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:39,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:39,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:39,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:41,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:41,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:30:41,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:30:41,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1919 [2020-10-12 19:30:41,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:41,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:30:41,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:30:41,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 19:30:41,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:41,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:41,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:41,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:41,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:41,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:41,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:30:41,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:41,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:30:41,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:41,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:30:41,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:41,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790104489] [2020-10-12 19:30:41,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:41,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:30:41,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751557949] [2020-10-12 19:30:41,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:30:41,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:41,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:30:41,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:30:41,908 INFO L87 Difference]: Start difference. First operand 495 states and 701 transitions. Second operand 10 states. [2020-10-12 19:30:42,051 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-12 19:30:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:42,894 INFO L93 Difference]: Finished difference Result 833 states and 1211 transitions. [2020-10-12 19:30:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:30:42,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-12 19:30:42,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:42,897 INFO L225 Difference]: With dead ends: 833 [2020-10-12 19:30:42,897 INFO L226 Difference]: Without dead ends: 500 [2020-10-12 19:30:42,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-12 19:30:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2020-10-12 19:30:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 491. [2020-10-12 19:30:43,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-10-12 19:30:43,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 693 transitions. [2020-10-12 19:30:43,041 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 693 transitions. Word has length 57 [2020-10-12 19:30:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:43,041 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 693 transitions. [2020-10-12 19:30:43,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:30:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 693 transitions. [2020-10-12 19:30:43,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:30:43,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:43,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:43,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:30:43,043 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:43,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:43,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1133419507, now seen corresponding path program 1 times [2020-10-12 19:30:43,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:43,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966257543] [2020-10-12 19:30:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:43,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:43,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:43,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:43,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:43,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:30:43,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:30:43,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-12 19:30:43,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:43,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:30:43,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:30:43,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 19:30:43,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:43,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:43,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:43,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:43,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:43,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:43,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:30:43,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:43,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:30:43,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:43,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:30:43,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:43,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966257543] [2020-10-12 19:30:43,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:43,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:30:43,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656760915] [2020-10-12 19:30:43,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:30:43,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:43,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:30:43,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:30:43,684 INFO L87 Difference]: Start difference. First operand 491 states and 693 transitions. Second operand 6 states. [2020-10-12 19:30:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:44,288 INFO L93 Difference]: Finished difference Result 863 states and 1248 transitions. [2020-10-12 19:30:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:30:44,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-12 19:30:44,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:44,291 INFO L225 Difference]: With dead ends: 863 [2020-10-12 19:30:44,291 INFO L226 Difference]: Without dead ends: 446 [2020-10-12 19:30:44,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:30:44,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-12 19:30:44,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2020-10-12 19:30:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 446 states. [2020-10-12 19:30:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 631 transitions. [2020-10-12 19:30:44,415 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 631 transitions. Word has length 57 [2020-10-12 19:30:44,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:44,415 INFO L479 AbstractCegarLoop]: Abstraction has 446 states and 631 transitions. [2020-10-12 19:30:44,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:30:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 631 transitions. [2020-10-12 19:30:44,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:30:44,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:44,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:44,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:30:44,416 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:44,417 INFO L82 PathProgramCache]: Analyzing trace with hash 624372179, now seen corresponding path program 1 times [2020-10-12 19:30:44,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:44,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127828907] [2020-10-12 19:30:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:44,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:44,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:44,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:44,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:45,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:45,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:46,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:46,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:30:46,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:30:46,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1794 [2020-10-12 19:30:46,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:46,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:30:46,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:30:46,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:30:46,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:46,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:46,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:46,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:46,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:46,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:46,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:30:46,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:46,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:30:46,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:46,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:30:46,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:46,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127828907] [2020-10-12 19:30:46,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:46,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:30:46,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024468470] [2020-10-12 19:30:46,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:30:46,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:46,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:30:46,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:30:46,528 INFO L87 Difference]: Start difference. First operand 446 states and 631 transitions. Second operand 12 states. [2020-10-12 19:30:46,866 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 122 [2020-10-12 19:30:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:48,421 INFO L93 Difference]: Finished difference Result 958 states and 1388 transitions. [2020-10-12 19:30:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 19:30:48,421 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-10-12 19:30:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:48,424 INFO L225 Difference]: With dead ends: 958 [2020-10-12 19:30:48,424 INFO L226 Difference]: Without dead ends: 606 [2020-10-12 19:30:48,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-12 19:30:48,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-10-12 19:30:48,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 429. [2020-10-12 19:30:48,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-12 19:30:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 611 transitions. [2020-10-12 19:30:48,557 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 611 transitions. Word has length 58 [2020-10-12 19:30:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:48,557 INFO L479 AbstractCegarLoop]: Abstraction has 429 states and 611 transitions. [2020-10-12 19:30:48,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:30:48,557 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 611 transitions. [2020-10-12 19:30:48,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:30:48,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:48,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:48,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:30:48,558 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:48,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:48,558 INFO L82 PathProgramCache]: Analyzing trace with hash 107187702, now seen corresponding path program 1 times [2020-10-12 19:30:48,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:48,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606916739] [2020-10-12 19:30:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:48,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:48,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:48,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:48,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:48,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:49,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:49,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:49,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:49,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:49,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:50,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:50,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:53,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:53,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:30:53,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 19:30:53,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:30:53,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:53,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:30:53,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:30:53,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:30:53,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:54,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:54,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:54,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:54,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:54,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:54,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:30:54,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:54,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:30:54,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:54,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:30:54,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:54,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606916739] [2020-10-12 19:30:54,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:54,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:30:54,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365863380] [2020-10-12 19:30:54,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:30:54,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:54,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:30:54,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:30:54,034 INFO L87 Difference]: Start difference. First operand 429 states and 611 transitions. Second operand 15 states. [2020-10-12 19:30:54,497 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 126 [2020-10-12 19:30:55,093 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-12 19:30:57,163 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-12 19:30:57,502 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-12 19:30:57,694 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-12 19:30:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:59,182 INFO L93 Difference]: Finished difference Result 2520 states and 3693 transitions. [2020-10-12 19:30:59,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 19:30:59,182 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-10-12 19:30:59,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:59,189 INFO L225 Difference]: With dead ends: 2520 [2020-10-12 19:30:59,189 INFO L226 Difference]: Without dead ends: 2182 [2020-10-12 19:30:59,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=358, Invalid=1364, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 19:30:59,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2020-10-12 19:30:59,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 429. [2020-10-12 19:30:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-12 19:30:59,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 610 transitions. [2020-10-12 19:30:59,346 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 610 transitions. Word has length 58 [2020-10-12 19:30:59,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:59,346 INFO L479 AbstractCegarLoop]: Abstraction has 429 states and 610 transitions. [2020-10-12 19:30:59,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:30:59,346 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 610 transitions. [2020-10-12 19:30:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:30:59,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:59,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:59,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:30:59,347 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:59,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1491632035, now seen corresponding path program 1 times [2020-10-12 19:30:59,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:59,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302136178] [2020-10-12 19:30:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:59,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:59,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:59,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:59,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:59,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:59,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:00,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:00,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:31:00,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:31:00,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1382 [2020-10-12 19:31:00,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:00,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:31:00,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:31:00,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 19:31:00,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:01,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:01,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:01,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:01,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:01,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:01,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-12 19:31:01,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:01,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:31:01,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:01,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:31:01,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:01,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302136178] [2020-10-12 19:31:01,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:01,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:31:01,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651535711] [2020-10-12 19:31:01,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:31:01,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:01,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:31:01,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:31:01,068 INFO L87 Difference]: Start difference. First operand 429 states and 610 transitions. Second operand 12 states. [2020-10-12 19:31:01,533 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 128 [2020-10-12 19:31:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:03,572 INFO L93 Difference]: Finished difference Result 1850 states and 2713 transitions. [2020-10-12 19:31:03,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 19:31:03,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-10-12 19:31:03,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:03,576 INFO L225 Difference]: With dead ends: 1850 [2020-10-12 19:31:03,576 INFO L226 Difference]: Without dead ends: 1512 [2020-10-12 19:31:03,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-10-12 19:31:03,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2020-10-12 19:31:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 432. [2020-10-12 19:31:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-10-12 19:31:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 613 transitions. [2020-10-12 19:31:03,738 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 613 transitions. Word has length 58 [2020-10-12 19:31:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:03,739 INFO L479 AbstractCegarLoop]: Abstraction has 432 states and 613 transitions. [2020-10-12 19:31:03,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:31:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 613 transitions. [2020-10-12 19:31:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 19:31:03,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:03,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:03,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:31:03,740 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:03,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1917591538, now seen corresponding path program 1 times [2020-10-12 19:31:03,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:03,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999922034] [2020-10-12 19:31:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:03,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:03,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:03,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:04,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:04,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:05,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:06,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:06,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 19:31:06,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:31:06,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3161 [2020-10-12 19:31:06,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 19:31:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:31:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 19:31:06,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:07,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:07,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:07,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:07,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:07,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:07,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:31:07,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:07,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:07,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:07,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:07,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:31:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:07,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999922034] [2020-10-12 19:31:07,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:07,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-10-12 19:31:07,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805726338] [2020-10-12 19:31:07,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 19:31:07,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:07,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 19:31:07,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-12 19:31:07,538 INFO L87 Difference]: Start difference. First operand 432 states and 613 transitions. Second operand 19 states. [2020-10-12 19:31:08,016 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-12 19:31:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:13,563 INFO L93 Difference]: Finished difference Result 1469 states and 2146 transitions. [2020-10-12 19:31:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 19:31:13,564 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-10-12 19:31:13,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:13,566 INFO L225 Difference]: With dead ends: 1469 [2020-10-12 19:31:13,566 INFO L226 Difference]: Without dead ends: 1300 [2020-10-12 19:31:13,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 19:31:13,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2020-10-12 19:31:13,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 430. [2020-10-12 19:31:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-10-12 19:31:13,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 609 transitions. [2020-10-12 19:31:13,717 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 609 transitions. Word has length 59 [2020-10-12 19:31:13,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:13,717 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 609 transitions. [2020-10-12 19:31:13,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 19:31:13,717 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 609 transitions. [2020-10-12 19:31:13,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 19:31:13,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:13,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:13,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:31:13,718 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:13,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:13,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2143539553, now seen corresponding path program 1 times [2020-10-12 19:31:13,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:13,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645314164] [2020-10-12 19:31:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:13,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:13,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:13,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:13,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:13,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:15,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:15,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 19:31:15,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:31:15,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1635 [2020-10-12 19:31:15,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:15,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:31:15,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:31:15,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:31:15,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:15,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:15,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:15,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:15,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:15,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:15,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:31:15,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:15,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:31:15,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:15,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:31:15,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:15,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645314164] [2020-10-12 19:31:15,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:15,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:31:15,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486970469] [2020-10-12 19:31:15,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:31:15,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:15,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:31:15,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:31:15,812 INFO L87 Difference]: Start difference. First operand 430 states and 609 transitions. Second operand 15 states. [2020-10-12 19:31:16,319 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 124 [2020-10-12 19:31:16,923 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-12 19:31:18,417 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-12 19:31:18,678 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-12 19:31:19,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:19,731 INFO L93 Difference]: Finished difference Result 1488 states and 2165 transitions. [2020-10-12 19:31:19,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 19:31:19,732 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-12 19:31:19,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:19,735 INFO L225 Difference]: With dead ends: 1488 [2020-10-12 19:31:19,735 INFO L226 Difference]: Without dead ends: 1150 [2020-10-12 19:31:19,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=315, Invalid=1167, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 19:31:19,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2020-10-12 19:31:19,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 427. [2020-10-12 19:31:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-12 19:31:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 605 transitions. [2020-10-12 19:31:19,896 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 605 transitions. Word has length 59 [2020-10-12 19:31:19,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:19,896 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 605 transitions. [2020-10-12 19:31:19,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:31:19,897 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 605 transitions. [2020-10-12 19:31:19,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 19:31:19,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:19,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:19,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:31:19,898 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:19,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:19,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1141567661, now seen corresponding path program 1 times [2020-10-12 19:31:19,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:19,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403197373] [2020-10-12 19:31:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:19,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:19,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:20,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:20,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:21,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:21,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 19:31:21,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:31:21,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1385 [2020-10-12 19:31:21,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:21,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 19:31:21,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 19:31:21,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 19:31:21,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:21,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:21,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:21,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:21,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:21,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:21,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:31:21,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:21,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:21,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:21,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:21,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:21,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403197373] [2020-10-12 19:31:21,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:21,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-12 19:31:21,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376619167] [2020-10-12 19:31:21,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 19:31:21,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:21,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 19:31:21,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-12 19:31:21,877 INFO L87 Difference]: Start difference. First operand 427 states and 605 transitions. Second operand 20 states. [2020-10-12 19:31:22,391 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 129 [2020-10-12 19:31:23,015 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-12 19:31:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:26,295 INFO L93 Difference]: Finished difference Result 1297 states and 1886 transitions. [2020-10-12 19:31:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:31:26,296 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-12 19:31:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:26,299 INFO L225 Difference]: With dead ends: 1297 [2020-10-12 19:31:26,299 INFO L226 Difference]: Without dead ends: 1128 [2020-10-12 19:31:26,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 19:31:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2020-10-12 19:31:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 435. [2020-10-12 19:31:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-12 19:31:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 614 transitions. [2020-10-12 19:31:26,537 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 614 transitions. Word has length 59 [2020-10-12 19:31:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:26,538 INFO L479 AbstractCegarLoop]: Abstraction has 435 states and 614 transitions. [2020-10-12 19:31:26,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 19:31:26,538 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 614 transitions. [2020-10-12 19:31:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 19:31:26,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:26,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:26,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 19:31:26,539 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:26,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:26,540 INFO L82 PathProgramCache]: Analyzing trace with hash 392725555, now seen corresponding path program 1 times [2020-10-12 19:31:26,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:26,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573033983] [2020-10-12 19:31:26,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:26,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:26,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:26,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:26,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:27,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:27,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:29,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:29,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 19:31:29,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:31:29,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2596 [2020-10-12 19:31:29,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:29,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 19:31:29,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 19:31:29,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 19:31:29,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:29,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:29,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:29,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:29,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:29,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:29,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:31:29,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:29,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:29,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:29,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:29,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:29,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573033983] [2020-10-12 19:31:29,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:29,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-10-12 19:31:29,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065516925] [2020-10-12 19:31:29,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 19:31:29,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:29,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 19:31:29,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-12 19:31:29,834 INFO L87 Difference]: Start difference. First operand 435 states and 614 transitions. Second operand 19 states. [2020-10-12 19:31:29,976 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-12 19:31:30,399 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 148 [2020-10-12 19:31:30,846 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-12 19:31:31,069 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-12 19:31:31,328 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-12 19:31:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:34,210 INFO L93 Difference]: Finished difference Result 1699 states and 2487 transitions. [2020-10-12 19:31:34,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 19:31:34,212 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-10-12 19:31:34,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:34,216 INFO L225 Difference]: With dead ends: 1699 [2020-10-12 19:31:34,216 INFO L226 Difference]: Without dead ends: 1372 [2020-10-12 19:31:34,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 19:31:34,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2020-10-12 19:31:34,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 440. [2020-10-12 19:31:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2020-10-12 19:31:34,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 620 transitions. [2020-10-12 19:31:34,441 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 620 transitions. Word has length 59 [2020-10-12 19:31:34,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:34,442 INFO L479 AbstractCegarLoop]: Abstraction has 440 states and 620 transitions. [2020-10-12 19:31:34,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 19:31:34,442 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 620 transitions. [2020-10-12 19:31:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 19:31:34,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:34,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:34,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 19:31:34,443 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:34,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:34,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1245958868, now seen corresponding path program 1 times [2020-10-12 19:31:34,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:34,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618176962] [2020-10-12 19:31:34,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:34,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:34,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:34,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:35,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:35,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 19:31:35,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:31:35,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 980 [2020-10-12 19:31:35,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:35,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 19:31:35,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:31:35,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 19:31:35,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:35,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:35,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:35,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:35,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:35,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:35,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:31:35,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:35,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:35,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:35,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:35,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:35,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618176962] [2020-10-12 19:31:35,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:35,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 19:31:35,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030511714] [2020-10-12 19:31:35,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 19:31:35,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:35,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 19:31:35,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:31:35,775 INFO L87 Difference]: Start difference. First operand 440 states and 620 transitions. Second operand 9 states. [2020-10-12 19:31:35,933 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-12 19:31:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:37,281 INFO L93 Difference]: Finished difference Result 947 states and 1375 transitions. [2020-10-12 19:31:37,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 19:31:37,283 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-12 19:31:37,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:37,284 INFO L225 Difference]: With dead ends: 947 [2020-10-12 19:31:37,284 INFO L226 Difference]: Without dead ends: 593 [2020-10-12 19:31:37,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:31:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-10-12 19:31:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 428. [2020-10-12 19:31:37,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-10-12 19:31:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 604 transitions. [2020-10-12 19:31:37,436 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 604 transitions. Word has length 60 [2020-10-12 19:31:37,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:37,436 INFO L479 AbstractCegarLoop]: Abstraction has 428 states and 604 transitions. [2020-10-12 19:31:37,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 19:31:37,437 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 604 transitions. [2020-10-12 19:31:37,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 19:31:37,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:37,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:37,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 19:31:37,437 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:37,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2132230103, now seen corresponding path program 1 times [2020-10-12 19:31:37,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:37,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469060742] [2020-10-12 19:31:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:37,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:37,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:37,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:37,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 19:31:37,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 19:31:37,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-12 19:31:37,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:37,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:31:37,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:31:37,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:31:37,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:37,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:37,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:37,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:37,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:37,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:37,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:31:37,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:37,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:37,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:37,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:37,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:37,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469060742] [2020-10-12 19:31:37,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:37,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:31:37,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027928879] [2020-10-12 19:31:37,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:31:37,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:37,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:31:37,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:31:37,753 INFO L87 Difference]: Start difference. First operand 428 states and 604 transitions. Second operand 6 states. [2020-10-12 19:31:37,916 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-12 19:31:39,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:39,067 INFO L93 Difference]: Finished difference Result 1399 states and 2062 transitions. [2020-10-12 19:31:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:31:39,068 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-12 19:31:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:39,070 INFO L225 Difference]: With dead ends: 1399 [2020-10-12 19:31:39,070 INFO L226 Difference]: Without dead ends: 1078 [2020-10-12 19:31:39,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:31:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2020-10-12 19:31:39,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 432. [2020-10-12 19:31:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-10-12 19:31:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 602 transitions. [2020-10-12 19:31:39,317 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 602 transitions. Word has length 60 [2020-10-12 19:31:39,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:39,318 INFO L479 AbstractCegarLoop]: Abstraction has 432 states and 602 transitions. [2020-10-12 19:31:39,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:31:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 602 transitions. [2020-10-12 19:31:39,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 19:31:39,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:39,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:39,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 19:31:39,319 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:39,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:39,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1413895087, now seen corresponding path program 1 times [2020-10-12 19:31:39,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:39,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868021776] [2020-10-12 19:31:39,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:39,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:39,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:39,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:40,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:40,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 19:31:40,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:31:40,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 826 [2020-10-12 19:31:40,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:40,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:31:40,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:31:40,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 19:31:40,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:40,421 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-12 19:31:40,600 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 19:31:40,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:40,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:40,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:40,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:40,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:40,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:31:40,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:40,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:40,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:40,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:40,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:40,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868021776] [2020-10-12 19:31:40,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:40,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:31:40,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434802046] [2020-10-12 19:31:40,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:31:40,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:40,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:31:40,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:31:40,625 INFO L87 Difference]: Start difference. First operand 432 states and 602 transitions. Second operand 10 states. [2020-10-12 19:31:40,798 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-12 19:31:42,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:42,110 INFO L93 Difference]: Finished difference Result 1096 states and 1585 transitions. [2020-10-12 19:31:42,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:31:42,111 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-12 19:31:42,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:42,112 INFO L225 Difference]: With dead ends: 1096 [2020-10-12 19:31:42,112 INFO L226 Difference]: Without dead ends: 754 [2020-10-12 19:31:42,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-12 19:31:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2020-10-12 19:31:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 411. [2020-10-12 19:31:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-10-12 19:31:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 575 transitions. [2020-10-12 19:31:42,284 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 575 transitions. Word has length 60 [2020-10-12 19:31:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:42,284 INFO L479 AbstractCegarLoop]: Abstraction has 411 states and 575 transitions. [2020-10-12 19:31:42,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:31:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 575 transitions. [2020-10-12 19:31:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 19:31:42,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:42,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:42,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 19:31:42,285 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:42,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:42,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1762278994, now seen corresponding path program 1 times [2020-10-12 19:31:42,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:42,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124158837] [2020-10-12 19:31:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:42,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:42,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:42,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:42,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:42,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:42,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:42,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:42,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:42,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:42,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:43,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:44,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:46,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:46,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:46,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:47,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:47,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 19:31:47,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 19:31:47,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:31:47,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:47,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 19:31:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:31:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 19:31:47,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:48,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:48,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:48,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:48,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:48,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:48,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:31:48,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:48,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:31:48,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:48,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:31:48,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:48,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124158837] [2020-10-12 19:31:48,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:48,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-12 19:31:48,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157706400] [2020-10-12 19:31:48,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 19:31:48,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:48,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 19:31:48,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-12 19:31:48,597 INFO L87 Difference]: Start difference. First operand 411 states and 575 transitions. Second operand 19 states. [2020-10-12 19:31:48,756 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-12 19:31:49,256 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 131 [2020-10-12 19:31:49,580 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-12 19:31:49,744 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-12 19:31:51,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:51,199 INFO L93 Difference]: Finished difference Result 1371 states and 1991 transitions. [2020-10-12 19:31:51,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 19:31:51,200 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-10-12 19:31:51,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:51,203 INFO L225 Difference]: With dead ends: 1371 [2020-10-12 19:31:51,203 INFO L226 Difference]: Without dead ends: 1053 [2020-10-12 19:31:51,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2020-10-12 19:31:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2020-10-12 19:31:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 511. [2020-10-12 19:31:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-10-12 19:31:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 715 transitions. [2020-10-12 19:31:51,469 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 715 transitions. Word has length 81 [2020-10-12 19:31:51,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:51,469 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 715 transitions. [2020-10-12 19:31:51,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 19:31:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 715 transitions. [2020-10-12 19:31:51,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 19:31:51,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:51,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:51,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 19:31:51,471 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:51,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:51,471 INFO L82 PathProgramCache]: Analyzing trace with hash 454145356, now seen corresponding path program 1 times [2020-10-12 19:31:51,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:51,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497134918] [2020-10-12 19:31:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:51,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:51,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:51,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:51,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:51,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:51,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:51,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:51,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:51,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:52,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:52,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:52,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:52,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:56,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:56,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 19:31:56,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 19:31:56,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:31:56,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:56,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:31:56,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 19:31:56,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 19:31:56,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:56,672 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 19 [2020-10-12 19:31:56,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:56,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:56,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:56,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:56,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:56,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:31:56,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:56,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:56,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:56,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:56,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:57,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497134918] [2020-10-12 19:31:57,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:57,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 19:31:57,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924961152] [2020-10-12 19:31:57,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:31:57,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:57,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:31:57,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:31:57,004 INFO L87 Difference]: Start difference. First operand 511 states and 715 transitions. Second operand 15 states. [2020-10-12 19:31:57,447 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 120 [2020-10-12 19:32:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:00,272 INFO L93 Difference]: Finished difference Result 1521 states and 2182 transitions. [2020-10-12 19:32:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 19:32:00,273 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 81 [2020-10-12 19:32:00,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:00,275 INFO L225 Difference]: With dead ends: 1521 [2020-10-12 19:32:00,275 INFO L226 Difference]: Without dead ends: 1311 [2020-10-12 19:32:00,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2020-10-12 19:32:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-10-12 19:32:00,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 735. [2020-10-12 19:32:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2020-10-12 19:32:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1045 transitions. [2020-10-12 19:32:00,578 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1045 transitions. Word has length 81 [2020-10-12 19:32:00,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:00,578 INFO L479 AbstractCegarLoop]: Abstraction has 735 states and 1045 transitions. [2020-10-12 19:32:00,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:32:00,578 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1045 transitions. [2020-10-12 19:32:00,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 19:32:00,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:00,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:32:00,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 19:32:00,580 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:00,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:00,580 INFO L82 PathProgramCache]: Analyzing trace with hash 692330520, now seen corresponding path program 1 times [2020-10-12 19:32:00,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:00,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624540840] [2020-10-12 19:32:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:00,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:00,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:00,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:00,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:00,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:01,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:01,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:01,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 19:32:01,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:32:01,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 971 [2020-10-12 19:32:01,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:01,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:32:01,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:32:01,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 19:32:01,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:01,804 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 19:32:01,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:01,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:01,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:01,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:01,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:01,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:32:01,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:01,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:32:01,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:01,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:32:01,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:32:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:32:01,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624540840] [2020-10-12 19:32:01,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:01,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:32:01,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958716075] [2020-10-12 19:32:01,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:32:01,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:01,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:32:01,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:32:01,857 INFO L87 Difference]: Start difference. First operand 735 states and 1045 transitions. Second operand 6 states. [2020-10-12 19:32:02,002 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-12 19:32:03,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:03,290 INFO L93 Difference]: Finished difference Result 2277 states and 3293 transitions. [2020-10-12 19:32:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:32:03,291 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-12 19:32:03,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:03,293 INFO L225 Difference]: With dead ends: 2277 [2020-10-12 19:32:03,293 INFO L226 Difference]: Without dead ends: 1635 [2020-10-12 19:32:03,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:32:03,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2020-10-12 19:32:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1631. [2020-10-12 19:32:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1631 states. [2020-10-12 19:32:04,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2286 transitions. [2020-10-12 19:32:04,033 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2286 transitions. Word has length 81 [2020-10-12 19:32:04,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:04,033 INFO L479 AbstractCegarLoop]: Abstraction has 1631 states and 2286 transitions. [2020-10-12 19:32:04,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:32:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2286 transitions. [2020-10-12 19:32:04,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 19:32:04,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:04,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:32:04,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 19:32:04,035 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:04,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:04,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1187828934, now seen corresponding path program 1 times [2020-10-12 19:32:04,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:04,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808346609] [2020-10-12 19:32:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:04,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:04,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:04,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:04,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:04,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:04,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:05,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:05,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 19:32:05,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:32:05,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1518 [2020-10-12 19:32:05,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:05,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:32:05,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:32:05,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 19:32:05,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:05,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:05,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:05,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:05,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:05,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:05,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:32:05,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:05,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:32:05,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:05,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:32:05,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:32:05,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808346609] [2020-10-12 19:32:05,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:05,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:32:05,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857970560] [2020-10-12 19:32:05,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:32:05,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:05,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:32:05,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:32:05,725 INFO L87 Difference]: Start difference. First operand 1631 states and 2286 transitions. Second operand 6 states. [2020-10-12 19:32:05,868 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-12 19:32:08,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:08,585 INFO L93 Difference]: Finished difference Result 6237 states and 8878 transitions. [2020-10-12 19:32:08,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:32:08,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-12 19:32:08,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:08,592 INFO L225 Difference]: With dead ends: 6237 [2020-10-12 19:32:08,592 INFO L226 Difference]: Without dead ends: 4783 [2020-10-12 19:32:08,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:32:08,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2020-10-12 19:32:10,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 3687. [2020-10-12 19:32:10,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3687 states. [2020-10-12 19:32:10,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3687 states to 3687 states and 5177 transitions. [2020-10-12 19:32:10,314 INFO L78 Accepts]: Start accepts. Automaton has 3687 states and 5177 transitions. Word has length 81 [2020-10-12 19:32:10,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:10,314 INFO L479 AbstractCegarLoop]: Abstraction has 3687 states and 5177 transitions. [2020-10-12 19:32:10,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:32:10,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3687 states and 5177 transitions. [2020-10-12 19:32:10,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 19:32:10,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:10,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:32:10,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 19:32:10,316 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:10,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:10,317 INFO L82 PathProgramCache]: Analyzing trace with hash 562368973, now seen corresponding path program 1 times [2020-10-12 19:32:10,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:10,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033192786] [2020-10-12 19:32:10,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:10,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:10,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:10,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:10,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:10,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:10,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:10,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:10,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:10,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:10,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:10,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:11,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:13,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:13,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:13,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:15,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:15,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 19:32:15,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 19:32:15,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 19:32:15,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:15,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 19:32:15,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:32:15,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 19:32:15,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:15,979 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 19:32:15,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:15,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:15,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:15,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:15,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:15,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:32:15,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:15,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:32:15,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:15,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:32:15,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:32:16,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033192786] [2020-10-12 19:32:16,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:16,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-12 19:32:16,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195706996] [2020-10-12 19:32:16,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 19:32:16,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:16,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 19:32:16,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-12 19:32:16,025 INFO L87 Difference]: Start difference. First operand 3687 states and 5177 transitions. Second operand 18 states. [2020-10-12 19:32:16,198 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-12 19:32:16,753 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 138 [2020-10-12 19:32:17,175 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-12 19:32:17,377 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-12 19:32:17,582 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-12 19:32:17,856 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-12 19:32:18,084 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-12 19:32:18,305 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-12 19:32:18,471 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-12 19:32:18,659 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-12 19:32:19,028 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-12 19:32:19,339 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-10-12 19:32:19,688 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-10-12 19:32:20,476 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-10-12 19:32:20,698 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-12 19:32:20,870 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-12 19:32:21,102 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-12 19:32:21,307 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-12 19:32:21,672 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-12 19:32:22,318 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-12 19:32:24,177 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-12 19:32:24,344 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-12 19:32:27,929 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-12 19:32:28,111 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-12 19:32:28,397 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-12 19:32:50,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:50,976 INFO L93 Difference]: Finished difference Result 47777 states and 66263 transitions. [2020-10-12 19:32:50,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 19:32:50,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-10-12 19:32:50,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:51,025 INFO L225 Difference]: With dead ends: 47777 [2020-10-12 19:32:51,025 INFO L226 Difference]: Without dead ends: 46123 [2020-10-12 19:32:51,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=694, Invalid=3088, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 19:32:51,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46123 states. [2020-10-12 19:32:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46123 to 3717. [2020-10-12 19:32:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3717 states. [2020-10-12 19:32:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 5216 transitions. [2020-10-12 19:32:53,279 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 5216 transitions. Word has length 81 [2020-10-12 19:32:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:53,279 INFO L479 AbstractCegarLoop]: Abstraction has 3717 states and 5216 transitions. [2020-10-12 19:32:53,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 19:32:53,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 5216 transitions. [2020-10-12 19:32:53,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 19:32:53,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:53,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:32:53,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 19:32:53,282 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:53,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:53,282 INFO L82 PathProgramCache]: Analyzing trace with hash -446910163, now seen corresponding path program 1 times [2020-10-12 19:32:53,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:53,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807119589] [2020-10-12 19:32:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:53,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:53,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:53,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:53,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:53,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:53,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 19:32:53,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:32:53,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-10-12 19:32:53,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:53,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:32:53,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-12 19:32:53,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 19:32:53,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:54,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:54,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:54,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:54,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:54,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:54,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:32:54,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:54,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:32:54,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:54,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:32:54,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:32:54,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807119589] [2020-10-12 19:32:54,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:54,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:32:54,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396551843] [2020-10-12 19:32:54,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:32:54,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:54,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:32:54,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:32:54,019 INFO L87 Difference]: Start difference. First operand 3717 states and 5216 transitions. Second operand 6 states. [2020-10-12 19:32:58,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:58,376 INFO L93 Difference]: Finished difference Result 6377 states and 8808 transitions. [2020-10-12 19:32:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:32:58,377 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-12 19:32:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:58,383 INFO L225 Difference]: With dead ends: 6377 [2020-10-12 19:32:58,383 INFO L226 Difference]: Without dead ends: 6375 [2020-10-12 19:32:58,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:32:58,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2020-10-12 19:33:00,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 3861. [2020-10-12 19:33:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3861 states. [2020-10-12 19:33:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3861 states to 3861 states and 5320 transitions. [2020-10-12 19:33:00,581 INFO L78 Accepts]: Start accepts. Automaton has 3861 states and 5320 transitions. Word has length 82 [2020-10-12 19:33:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:00,581 INFO L479 AbstractCegarLoop]: Abstraction has 3861 states and 5320 transitions. [2020-10-12 19:33:00,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:33:00,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3861 states and 5320 transitions. [2020-10-12 19:33:00,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 19:33:00,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:00,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:00,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 19:33:00,584 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:00,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:00,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1248601015, now seen corresponding path program 1 times [2020-10-12 19:33:00,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:00,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225021355] [2020-10-12 19:33:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:00,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:00,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:00,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:00,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:00,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:00,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:00,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:01,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:01,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:01,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:03,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:04,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:04,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:04,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:05,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:05,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 19:33:05,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 19:33:05,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:33:05,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:05,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 19:33:05,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:33:05,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 19:33:05,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:06,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:06,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:06,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:06,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:06,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:06,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 19:33:06,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:06,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:33:06,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:06,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:33:06,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:06,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225021355] [2020-10-12 19:33:06,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:06,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-12 19:33:06,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014919775] [2020-10-12 19:33:06,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 19:33:06,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:06,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 19:33:06,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-12 19:33:06,500 INFO L87 Difference]: Start difference. First operand 3861 states and 5320 transitions. Second operand 18 states.