/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/bitvector/interleave_bits.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 00:11:50,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 00:11:50,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 00:11:50,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 00:11:50,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 00:11:50,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 00:11:50,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 00:11:50,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 00:11:50,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 00:11:50,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 00:11:50,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 00:11:50,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 00:11:50,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 00:11:50,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 00:11:50,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 00:11:50,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 00:11:50,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 00:11:50,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 00:11:50,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 00:11:50,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 00:11:50,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 00:11:50,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 00:11:50,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 00:11:50,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 00:11:50,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 00:11:50,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 00:11:50,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 00:11:50,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 00:11:50,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 00:11:50,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 00:11:50,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 00:11:50,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 00:11:50,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 00:11:50,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 00:11:50,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 00:11:50,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 00:11:50,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 00:11:50,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 00:11:50,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 00:11:50,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 00:11:50,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 00:11:50,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 00:11:50,426 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 00:11:50,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 00:11:50,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 00:11:50,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 00:11:50,429 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 00:11:50,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 00:11:50,430 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 00:11:50,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 00:11:50,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 00:11:50,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 00:11:50,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 00:11:50,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 00:11:50,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 00:11:50,433 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 00:11:50,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 00:11:50,433 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 00:11:50,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 00:11:50,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 00:11:50,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 00:11:50,434 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 00:11:50,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 00:11:50,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 00:11:50,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 00:11:50,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 00:11:50,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 00:11:50,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 00:11:50,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 00:11:50,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 00:11:50,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 00:11:50,436 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 00:11:50,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 00:11:50,748 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 00:11:50,752 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 00:11:50,753 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 00:11:50,754 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 00:11:50,755 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/interleave_bits.i [2020-10-14 00:11:50,820 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/159cfb121/db809a2d75b54391a55d547a9e71599c/FLAG5a7f90f34 [2020-10-14 00:11:51,307 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 00:11:51,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/interleave_bits.i [2020-10-14 00:11:51,322 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/159cfb121/db809a2d75b54391a55d547a9e71599c/FLAG5a7f90f34 [2020-10-14 00:11:51,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/159cfb121/db809a2d75b54391a55d547a9e71599c [2020-10-14 00:11:51,691 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 00:11:51,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 00:11:51,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 00:11:51,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 00:11:51,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 00:11:51,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 12:11:51" (1/1) ... [2020-10-14 00:11:51,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2088d45a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:51, skipping insertion in model container [2020-10-14 00:11:51,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 12:11:51" (1/1) ... [2020-10-14 00:11:51,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 00:11:51,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 00:11:51,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 00:11:51,968 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 00:11:51,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 00:11:52,009 INFO L208 MainTranslator]: Completed translation [2020-10-14 00:11:52,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:52 WrapperNode [2020-10-14 00:11:52,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 00:11:52,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 00:11:52,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 00:11:52,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 00:11:52,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:52" (1/1) ... [2020-10-14 00:11:52,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:52" (1/1) ... [2020-10-14 00:11:52,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:52" (1/1) ... [2020-10-14 00:11:52,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:52" (1/1) ... [2020-10-14 00:11:52,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:52" (1/1) ... [2020-10-14 00:11:52,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:52" (1/1) ... [2020-10-14 00:11:52,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:52" (1/1) ... [2020-10-14 00:11:52,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 00:11:52,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 00:11:52,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 00:11:52,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 00:11:52,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 00:11:52,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 00:11:52,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 00:11:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 00:11:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 00:11:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 00:11:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2020-10-14 00:11:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 00:11:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-14 00:11:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-14 00:11:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-14 00:11:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 00:11:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 00:11:52,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 00:11:52,419 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 00:11:52,419 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 00:11:52,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 12:11:52 BoogieIcfgContainer [2020-10-14 00:11:52,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 00:11:52,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 00:11:52,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 00:11:52,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 00:11:52,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 12:11:51" (1/3) ... [2020-10-14 00:11:52,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d97e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 12:11:52, skipping insertion in model container [2020-10-14 00:11:52,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:11:52" (2/3) ... [2020-10-14 00:11:52,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d97e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 12:11:52, skipping insertion in model container [2020-10-14 00:11:52,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 12:11:52" (3/3) ... [2020-10-14 00:11:52,440 INFO L109 eAbstractionObserver]: Analyzing ICFG interleave_bits.i [2020-10-14 00:11:52,451 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 00:11:52,459 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 00:11:52,473 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 00:11:52,497 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 00:11:52,498 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 00:11:52,498 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 00:11:52,498 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 00:11:52,498 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 00:11:52,498 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 00:11:52,498 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 00:11:52,498 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 00:11:52,514 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-14 00:11:52,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 00:11:52,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:52,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:52,521 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:52,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:52,527 INFO L82 PathProgramCache]: Analyzing trace with hash -480905734, now seen corresponding path program 1 times [2020-10-14 00:11:52,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:52,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940953913] [2020-10-14 00:11:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:52,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:52,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:52,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 00:11:52,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:52,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-14 00:11:52,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:52,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:52,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 00:11:52,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:52,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 00:11:52,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 00:11:52,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:11:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:52,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:52,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:52,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:11:52,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:52,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:11:52,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:52,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:52,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:11:52,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:11:52,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:11:52,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:11:52,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940953913] [2020-10-14 00:11:52,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 00:11:52,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 00:11:52,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80705760] [2020-10-14 00:11:52,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 00:11:52,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:11:52,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 00:11:52,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 00:11:52,900 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-10-14 00:11:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:11:52,966 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-14 00:11:52,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 00:11:52,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-14 00:11:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:11:52,979 INFO L225 Difference]: With dead ends: 31 [2020-10-14 00:11:52,979 INFO L226 Difference]: Without dead ends: 13 [2020-10-14 00:11:52,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 00:11:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-14 00:11:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-14 00:11:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-14 00:11:53,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-14 00:11:53,029 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-14 00:11:53,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:11:53,029 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-14 00:11:53,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 00:11:53,030 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-14 00:11:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 00:11:53,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:53,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:53,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 00:11:53,031 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:53,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:53,032 INFO L82 PathProgramCache]: Analyzing trace with hash -436122843, now seen corresponding path program 1 times [2020-10-14 00:11:53,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:53,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074189383] [2020-10-14 00:11:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:53,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:53,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:53,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 00:11:53,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:53,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-14 00:11:53,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:53,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:53,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 00:11:53,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:53,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 00:11:53,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:53,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:11:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:53,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:53,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:53,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:11:53,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:53,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:11:53,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:53,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:53,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:11:53,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:11:53,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:11:53,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:11:53,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074189383] [2020-10-14 00:11:53,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:11:53,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 00:11:53,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009862392] [2020-10-14 00:11:53,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 00:11:53,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:11:53,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 00:11:53,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 00:11:53,239 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-14 00:11:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:11:53,258 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-14 00:11:53,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 00:11:53,259 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-14 00:11:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:11:53,260 INFO L225 Difference]: With dead ends: 20 [2020-10-14 00:11:53,260 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 00:11:53,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 00:11:53,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 00:11:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 00:11:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 00:11:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-14 00:11:53,267 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-14 00:11:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:11:53,267 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-14 00:11:53,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 00:11:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-14 00:11:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 00:11:53,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:53,269 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:53,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 00:11:53,269 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:53,270 INFO L82 PathProgramCache]: Analyzing trace with hash 952146778, now seen corresponding path program 2 times [2020-10-14 00:11:53,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:53,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889128459] [2020-10-14 00:11:53,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:53,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:53,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:53,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 00:11:53,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:53,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-14 00:11:53,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:53,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:53,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 00:11:53,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:53,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 00:11:53,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:53,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:11:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:53,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:53,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:53,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:11:53,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:53,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 00:11:53,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:53,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:53,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:11:53,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:11:53,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:11:53,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 00:11:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:11:53,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889128459] [2020-10-14 00:11:53,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:11:53,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 00:11:53,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371706552] [2020-10-14 00:11:53,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 00:11:53,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:11:53,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 00:11:53,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 00:11:53,565 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-14 00:11:53,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:11:53,602 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-14 00:11:53,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 00:11:53,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-14 00:11:53,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:11:53,605 INFO L225 Difference]: With dead ends: 21 [2020-10-14 00:11:53,605 INFO L226 Difference]: Without dead ends: 15 [2020-10-14 00:11:53,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 00:11:53,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-14 00:11:53,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-14 00:11:53,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 00:11:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-14 00:11:53,620 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-14 00:11:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:11:53,621 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-14 00:11:53,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 00:11:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-14 00:11:53,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 00:11:53,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:53,622 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:53,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 00:11:53,623 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:53,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:53,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1038832069, now seen corresponding path program 3 times [2020-10-14 00:11:53,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:53,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430091981] [2020-10-14 00:11:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:53,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:53,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:53,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 00:11:53,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:53,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-14 00:11:53,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:53,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:53,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 00:11:53,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:53,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 00:11:53,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:53,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:11:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:53,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:53,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:53,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:11:53,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:53,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:11:53,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:53,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:53,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:11:53,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:11:53,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:11:53,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:11:53,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430091981] [2020-10-14 00:11:53,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:11:53,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 00:11:53,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154206013] [2020-10-14 00:11:53,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 00:11:53,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:11:53,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 00:11:53,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 00:11:53,934 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-10-14 00:11:53,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:11:53,963 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-14 00:11:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 00:11:53,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-14 00:11:53,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:11:53,965 INFO L225 Difference]: With dead ends: 22 [2020-10-14 00:11:53,965 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 00:11:53,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 00:11:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 00:11:53,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-14 00:11:53,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 00:11:53,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-14 00:11:53,971 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-14 00:11:53,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:11:53,972 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-14 00:11:53,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 00:11:53,972 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-14 00:11:53,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 00:11:53,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:53,973 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:53,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 00:11:53,974 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:53,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:53,974 INFO L82 PathProgramCache]: Analyzing trace with hash -568891206, now seen corresponding path program 4 times [2020-10-14 00:11:53,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:53,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431758365] [2020-10-14 00:11:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:53,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:54,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:54,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 00:11:54,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:54,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-14 00:11:54,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:54,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 00:11:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:54,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 00:11:54,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:11:54,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:11:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:54,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:54,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:54,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:11:54,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:54,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:11:54,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:54,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:54,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:11:54,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:11:54,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:11:54,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:11:54,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431758365] [2020-10-14 00:11:54,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:11:54,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 00:11:54,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705876549] [2020-10-14 00:11:54,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 00:11:54,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:11:54,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 00:11:54,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 00:11:54,171 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-14 00:11:54,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:11:54,204 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-14 00:11:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 00:11:54,205 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-14 00:11:54,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:11:54,205 INFO L225 Difference]: With dead ends: 23 [2020-10-14 00:11:54,206 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 00:11:54,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 00:11:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 00:11:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-14 00:11:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 00:11:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-14 00:11:54,212 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-14 00:11:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:11:54,212 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-14 00:11:54,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 00:11:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-14 00:11:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 00:11:54,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:54,213 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:54,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 00:11:54,214 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:54,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:54,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1131294821, now seen corresponding path program 5 times [2020-10-14 00:11:54,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:54,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029795631] [2020-10-14 00:11:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:54,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:54,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:54,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 00:11:54,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:54,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-14 00:11:54,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:54,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:54,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 00:11:54,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:54,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 00:11:54,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:54,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:11:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:54,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:54,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:54,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:11:54,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:54,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:11:54,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:54,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:54,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:11:54,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:11:54,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:11:54,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:11:54,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029795631] [2020-10-14 00:11:54,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:11:54,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 00:11:54,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907357798] [2020-10-14 00:11:54,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 00:11:54,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:11:54,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 00:11:54,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 00:11:54,544 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-14 00:11:54,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:11:54,605 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-14 00:11:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 00:11:54,607 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-14 00:11:54,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:11:54,608 INFO L225 Difference]: With dead ends: 24 [2020-10-14 00:11:54,608 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 00:11:54,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 00:11:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 00:11:54,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-14 00:11:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-14 00:11:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-14 00:11:54,620 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-14 00:11:54,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:11:54,621 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-14 00:11:54,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 00:11:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-14 00:11:54,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 00:11:54,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:54,622 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:54,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 00:11:54,623 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:54,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:54,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1997513190, now seen corresponding path program 6 times [2020-10-14 00:11:54,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:54,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341023467] [2020-10-14 00:11:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:54,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:54,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:54,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 00:11:54,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:54,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-14 00:11:54,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:54,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:54,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 00:11:54,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:54,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 00:11:54,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:54,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:11:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:54,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:54,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:54,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:11:54,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:54,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:11:54,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:54,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:54,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:11:54,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:11:54,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:11:54,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:11:54,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341023467] [2020-10-14 00:11:54,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:11:54,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 00:11:54,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800507629] [2020-10-14 00:11:54,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 00:11:54,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:11:54,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 00:11:54,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 00:11:54,945 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-14 00:11:55,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:11:55,022 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-14 00:11:55,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 00:11:55,024 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-14 00:11:55,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:11:55,025 INFO L225 Difference]: With dead ends: 25 [2020-10-14 00:11:55,025 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 00:11:55,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 00:11:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 00:11:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-14 00:11:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 00:11:55,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-14 00:11:55,031 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-14 00:11:55,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:11:55,032 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-14 00:11:55,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 00:11:55,032 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-14 00:11:55,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 00:11:55,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:55,033 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:55,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 00:11:55,033 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:55,034 INFO L82 PathProgramCache]: Analyzing trace with hash -206313723, now seen corresponding path program 7 times [2020-10-14 00:11:55,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:55,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133322627] [2020-10-14 00:11:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:55,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:55,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:55,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 00:11:55,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:55,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-14 00:11:55,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:55,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:55,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 00:11:55,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:55,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 00:11:55,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:11:55,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:11:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:55,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:55,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:55,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:11:55,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:55,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:11:55,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:55,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:55,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:11:55,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:11:55,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:11:55,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:11:55,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133322627] [2020-10-14 00:11:55,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:11:55,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 00:11:55,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668408040] [2020-10-14 00:11:55,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 00:11:55,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:11:55,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 00:11:55,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 00:11:55,290 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-14 00:11:55,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:11:55,359 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-14 00:11:55,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 00:11:55,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-14 00:11:55,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:11:55,361 INFO L225 Difference]: With dead ends: 26 [2020-10-14 00:11:55,361 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 00:11:55,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 00:11:55,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 00:11:55,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-14 00:11:55,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 00:11:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-14 00:11:55,367 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-14 00:11:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:11:55,367 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-14 00:11:55,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 00:11:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-14 00:11:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 00:11:55,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:55,369 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:55,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 00:11:55,369 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:55,370 INFO L82 PathProgramCache]: Analyzing trace with hash -513705094, now seen corresponding path program 8 times [2020-10-14 00:11:55,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:55,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842595566] [2020-10-14 00:11:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:55,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:55,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:55,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 00:11:55,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:55,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-14 00:11:55,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:55,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:55,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 00:11:55,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:55,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 00:11:55,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:55,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:11:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:55,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:55,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:55,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:11:55,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:55,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:11:55,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:55,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:11:55,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:11:55,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:11:55,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:11:55,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842595566] [2020-10-14 00:11:55,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:11:55,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 00:11:55,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330245696] [2020-10-14 00:11:55,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 00:11:55,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:11:55,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 00:11:55,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:11:55,657 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2020-10-14 00:11:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:11:55,731 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-14 00:11:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 00:11:55,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-14 00:11:55,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:11:55,733 INFO L225 Difference]: With dead ends: 27 [2020-10-14 00:11:55,733 INFO L226 Difference]: Without dead ends: 21 [2020-10-14 00:11:55,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:11:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-14 00:11:55,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-14 00:11:55,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 00:11:55,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-14 00:11:55,739 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-14 00:11:55,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:11:55,739 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-14 00:11:55,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 00:11:55,740 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-14 00:11:55,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 00:11:55,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:55,741 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:55,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 00:11:55,741 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:55,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1452903003, now seen corresponding path program 9 times [2020-10-14 00:11:55,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:55,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382129923] [2020-10-14 00:11:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:55,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:55,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:55,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 00:11:55,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:55,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-14 00:11:55,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:55,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:55,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 00:11:55,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:55,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 00:11:55,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:56,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:11:56,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:56,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:56,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:56,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:11:56,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:56,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:11:56,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:56,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:56,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:11:56,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:11:56,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:11:56,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:11:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:11:56,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382129923] [2020-10-14 00:11:56,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:11:56,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 00:11:56,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825873044] [2020-10-14 00:11:56,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 00:11:56,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:11:56,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 00:11:56,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 00:11:56,102 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-10-14 00:11:56,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:11:56,186 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-14 00:11:56,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 00:11:56,187 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-14 00:11:56,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:11:56,188 INFO L225 Difference]: With dead ends: 28 [2020-10-14 00:11:56,188 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 00:11:56,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 00:11:56,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 00:11:56,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 00:11:56,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 00:11:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-14 00:11:56,194 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-14 00:11:56,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:11:56,194 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-14 00:11:56,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 00:11:56,194 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-14 00:11:56,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 00:11:56,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:56,195 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:56,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 00:11:56,196 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:56,196 INFO L82 PathProgramCache]: Analyzing trace with hash -503267110, now seen corresponding path program 10 times [2020-10-14 00:11:56,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:56,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745153353] [2020-10-14 00:11:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:56,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:56,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:56,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 00:11:56,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:56,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-14 00:11:56,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:56,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:56,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 00:11:56,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:56,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 00:11:56,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:56,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:11:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:56,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:56,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:56,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:11:56,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:56,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:11:56,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:56,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:56,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:11:56,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:11:56,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:11:56,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:11:56,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745153353] [2020-10-14 00:11:56,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:11:56,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 00:11:56,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894677073] [2020-10-14 00:11:56,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 00:11:56,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:11:56,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 00:11:56,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 00:11:56,644 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2020-10-14 00:11:56,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:11:56,742 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-14 00:11:56,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 00:11:56,742 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-14 00:11:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:11:56,743 INFO L225 Difference]: With dead ends: 29 [2020-10-14 00:11:56,743 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 00:11:56,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 00:11:56,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 00:11:56,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 00:11:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 00:11:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-14 00:11:56,749 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-14 00:11:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:11:56,749 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-14 00:11:56,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 00:11:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-14 00:11:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 00:11:56,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:56,750 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:56,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 00:11:56,751 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:56,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:56,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1129325499, now seen corresponding path program 11 times [2020-10-14 00:11:56,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:56,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546028591] [2020-10-14 00:11:56,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:56,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:57,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:57,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 00:11:57,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:57,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-14 00:11:57,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:57,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:57,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 00:11:57,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:57,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 00:11:57,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:57,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:11:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:57,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:57,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:57,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:11:57,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:57,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:11:57,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:57,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:57,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:11:57,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:11:57,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:11:57,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:11:57,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546028591] [2020-10-14 00:11:57,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:11:57,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 00:11:57,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875005136] [2020-10-14 00:11:57,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 00:11:57,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:11:57,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 00:11:57,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 00:11:57,231 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-10-14 00:11:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:11:57,358 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-14 00:11:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 00:11:57,359 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-14 00:11:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:11:57,360 INFO L225 Difference]: With dead ends: 30 [2020-10-14 00:11:57,360 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 00:11:57,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 00:11:57,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 00:11:57,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-14 00:11:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 00:11:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-14 00:11:57,365 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-14 00:11:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:11:57,365 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-14 00:11:57,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 00:11:57,365 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-14 00:11:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 00:11:57,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:57,366 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:57,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 00:11:57,367 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:57,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:57,367 INFO L82 PathProgramCache]: Analyzing trace with hash 937700922, now seen corresponding path program 12 times [2020-10-14 00:11:57,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:57,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067914421] [2020-10-14 00:11:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:57,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:57,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:57,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 00:11:57,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:57,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-14 00:11:57,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:57,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:57,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 00:11:57,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:57,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 00:11:57,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:11:57,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:11:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:57,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:57,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:57,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:11:57,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:57,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:11:57,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:57,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:57,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:11:57,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:11:57,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:11:57,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:11:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:11:57,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067914421] [2020-10-14 00:11:57,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:11:57,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 00:11:57,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259659052] [2020-10-14 00:11:57,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 00:11:57,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:11:57,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 00:11:57,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 00:11:57,908 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2020-10-14 00:11:58,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:11:58,064 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-14 00:11:58,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 00:11:58,064 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-14 00:11:58,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:11:58,065 INFO L225 Difference]: With dead ends: 31 [2020-10-14 00:11:58,065 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 00:11:58,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 00:11:58,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 00:11:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 00:11:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 00:11:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-14 00:11:58,071 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-14 00:11:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:11:58,071 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-14 00:11:58,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 00:11:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-14 00:11:58,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 00:11:58,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:58,073 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:58,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 00:11:58,073 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:58,074 INFO L82 PathProgramCache]: Analyzing trace with hash 591010533, now seen corresponding path program 13 times [2020-10-14 00:11:58,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:58,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683740482] [2020-10-14 00:11:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:58,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:58,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:58,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 00:11:58,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:58,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-14 00:11:58,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:58,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:58,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 00:11:58,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:58,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 00:11:58,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:11:58,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:11:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:58,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:58,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:58,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:11:58,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:58,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:11:58,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:58,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:58,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:11:58,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:11:58,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:11:58,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:11:58,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683740482] [2020-10-14 00:11:58,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:11:58,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 00:11:58,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991492723] [2020-10-14 00:11:58,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 00:11:58,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:11:58,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 00:11:58,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 00:11:58,676 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 16 states. [2020-10-14 00:11:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:11:58,813 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-14 00:11:58,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 00:11:58,813 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-14 00:11:58,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:11:58,814 INFO L225 Difference]: With dead ends: 32 [2020-10-14 00:11:58,814 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 00:11:58,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 00:11:58,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 00:11:58,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-14 00:11:58,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 00:11:58,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-14 00:11:58,819 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-14 00:11:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:11:58,820 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-14 00:11:58,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 00:11:58,820 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-14 00:11:58,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 00:11:58,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:58,821 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:58,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 00:11:58,821 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:58,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:58,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1566456934, now seen corresponding path program 14 times [2020-10-14 00:11:58,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:58,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960351178] [2020-10-14 00:11:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:58,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:59,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:59,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 00:11:59,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:59,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-14 00:11:59,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:59,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:59,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 00:11:59,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:59,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 00:11:59,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:59,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:11:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:59,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:59,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:59,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:11:59,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:59,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:11:59,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:59,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:59,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:11:59,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:11:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:11:59,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:11:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:11:59,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960351178] [2020-10-14 00:11:59,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:11:59,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 00:11:59,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010346173] [2020-10-14 00:11:59,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 00:11:59,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:11:59,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 00:11:59,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 00:11:59,430 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 17 states. [2020-10-14 00:11:59,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:11:59,598 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-14 00:11:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 00:11:59,599 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-14 00:11:59,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:11:59,600 INFO L225 Difference]: With dead ends: 33 [2020-10-14 00:11:59,600 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 00:11:59,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 00:11:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 00:11:59,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 00:11:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 00:11:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-14 00:11:59,605 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-14 00:11:59,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:11:59,606 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-14 00:11:59,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 00:11:59,606 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-14 00:11:59,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 00:11:59,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:11:59,607 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:11:59,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 00:11:59,607 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:11:59,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:11:59,608 INFO L82 PathProgramCache]: Analyzing trace with hash 271528325, now seen corresponding path program 15 times [2020-10-14 00:11:59,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:11:59,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369896184] [2020-10-14 00:11:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:11:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:11:59,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:11:59,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:11:59,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 00:11:59,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:11:59,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-14 00:11:59,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:11:59,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:11:59,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 00:11:59,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 00:11:59,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 00:11:59,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:12:00,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:12:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:00,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:00,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:00,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 00:12:00,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:12:00,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:12:00,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:00,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:00,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:12:00,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:12:00,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:12:00,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:12:00,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369896184] [2020-10-14 00:12:00,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:12:00,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 00:12:00,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122926460] [2020-10-14 00:12:00,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 00:12:00,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:12:00,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 00:12:00,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 00:12:00,289 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 18 states. [2020-10-14 00:12:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:12:00,468 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-14 00:12:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 00:12:00,470 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-14 00:12:00,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:12:00,471 INFO L225 Difference]: With dead ends: 34 [2020-10-14 00:12:00,472 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 00:12:00,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 00:12:00,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 00:12:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 00:12:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 00:12:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-14 00:12:00,481 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-14 00:12:00,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:12:00,481 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-14 00:12:00,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 00:12:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-14 00:12:00,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 00:12:00,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:12:00,485 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:12:00,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 00:12:00,486 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:12:00,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:12:00,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1414496506, now seen corresponding path program 16 times [2020-10-14 00:12:00,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:12:00,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671486749] [2020-10-14 00:12:00,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:12:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 00:12:00,502 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 00:12:00,503 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 00:12:00,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 00:12:00,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 12:12:00 BoogieIcfgContainer [2020-10-14 00:12:00,536 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 00:12:00,539 INFO L168 Benchmark]: Toolchain (without parser) took 8845.32 ms. Allocated memory was 147.3 MB in the beginning and 336.1 MB in the end (delta: 188.7 MB). Free memory was 103.3 MB in the beginning and 218.2 MB in the end (delta: -115.0 MB). Peak memory consumption was 73.7 MB. Max. memory is 7.1 GB. [2020-10-14 00:12:00,545 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-14 00:12:00,547 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.78 ms. Allocated memory is still 147.3 MB. Free memory was 103.0 MB in the beginning and 92.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-10-14 00:12:00,553 INFO L168 Benchmark]: Boogie Preprocessor took 135.48 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 92.8 MB in the beginning and 181.8 MB in the end (delta: -88.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-10-14 00:12:00,554 INFO L168 Benchmark]: RCFGBuilder took 277.66 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 169.3 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-10-14 00:12:00,556 INFO L168 Benchmark]: TraceAbstraction took 8110.96 ms. Allocated memory was 204.5 MB in the beginning and 336.1 MB in the end (delta: 131.6 MB). Free memory was 168.7 MB in the beginning and 218.2 MB in the end (delta: -49.6 MB). Peak memory consumption was 82.0 MB. Max. memory is 7.1 GB. [2020-10-14 00:12:00,564 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 313.78 ms. Allocated memory is still 147.3 MB. Free memory was 103.0 MB in the beginning and 92.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.48 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 92.8 MB in the beginning and 181.8 MB in the end (delta: -88.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 277.66 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 169.3 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8110.96 ms. Allocated memory was 204.5 MB in the beginning and 336.1 MB in the end (delta: 131.6 MB). Free memory was 168.7 MB in the beginning and 218.2 MB in the end (delta: -49.6 MB). Peak memory consumption was 82.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 6]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 45, overapproximation of bitwiseAnd at line 36. Possible FailurePath: [L23] unsigned short x = __VERIFIER_nondet_ushort(); [L24] unsigned short y = __VERIFIER_nondet_ushort(); [L25] unsigned int xx; [L26] unsigned int yy; [L27] unsigned int zz; [L28] unsigned int z = 0; [L29] unsigned int i = 0; [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND FALSE !(i < sizeof(x) * 8) [L34] xx = x [L35] yy = y [L36] xx = (xx | (xx << 8u)) & 16711935U [L37] xx = (xx | (xx << 4u)) & 252645135U [L38] xx = (xx | (xx << 2u)) & 858993459U [L39] xx = (xx | (xx << 1u)) & 1431655765U [L40] yy = (yy | (yy << 8u)) & 16711935U [L41] yy = (yy | (yy << 4u)) & 252645135U [L42] yy = (yy | (yy << 2u)) & 858993459U [L43] yy = (yy | (yy << 1u)) & 1431655765U [L45] zz = xx | (yy << 1U) [L47] CALL __VERIFIER_assert(z == zz) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.0s, OverallIterations: 17, TraceHistogramMax: 16, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 182 SDtfs, 0 SDslu, 798 SDs, 0 SdLazy, 1465 SolverSat, 120 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 200 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 323 NumberOfCodeBlocks, 323 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 280 ConstructedInterpolants, 0 QuantifiedInterpolants, 22680 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 0/680 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...