/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 03:28:00,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:28:00,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:28:00,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:28:00,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:28:00,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:28:00,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:28:00,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:28:00,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:28:00,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:28:00,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:28:00,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:28:00,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:28:00,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:28:00,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:28:00,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:28:00,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:28:00,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:28:00,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:28:00,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:28:00,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:28:00,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:28:00,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:28:00,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:28:00,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:28:00,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:28:00,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:28:00,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:28:00,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:28:00,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:28:00,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:28:00,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:28:00,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:28:00,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:28:00,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:28:00,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:28:00,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:28:00,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:28:00,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:28:00,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:28:00,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:28:00,375 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 03:28:00,424 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:28:00,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:28:00,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:28:00,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:28:00,426 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:28:00,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:28:00,427 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:28:00,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:28:00,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:28:00,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:28:00,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:28:00,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:28:00,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:28:00,430 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:28:00,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:28:00,430 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:28:00,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:28:00,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:28:00,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:28:00,431 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:28:00,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:28:00,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:28:00,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:28:00,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:28:00,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:28:00,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:28:00,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:28:00,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:28:00,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:28:00,433 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-09-25 03:28:00,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:28:00,922 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:28:00,927 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:28:00,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:28:00,929 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:28:00,930 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2020-09-25 03:28:00,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a635b3cd/41cd8ad33fc34e62b2e3ae164827ddc2/FLAG41ddf39ce [2020-09-25 03:28:01,485 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:28:01,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/nested9.i [2020-09-25 03:28:01,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a635b3cd/41cd8ad33fc34e62b2e3ae164827ddc2/FLAG41ddf39ce [2020-09-25 03:28:01,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a635b3cd/41cd8ad33fc34e62b2e3ae164827ddc2 [2020-09-25 03:28:01,860 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:28:01,866 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:28:01,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:28:01,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:28:01,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:28:01,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:28:01" (1/1) ... [2020-09-25 03:28:01,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:01, skipping insertion in model container [2020-09-25 03:28:01,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:28:01" (1/1) ... [2020-09-25 03:28:01,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:28:01,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:28:02,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:28:02,136 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:28:02,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:28:02,178 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:28:02,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02 WrapperNode [2020-09-25 03:28:02,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:28:02,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:28:02,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:28:02,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:28:02,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (1/1) ... [2020-09-25 03:28:02,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (1/1) ... [2020-09-25 03:28:02,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (1/1) ... [2020-09-25 03:28:02,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (1/1) ... [2020-09-25 03:28:02,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (1/1) ... [2020-09-25 03:28:02,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (1/1) ... [2020-09-25 03:28:02,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (1/1) ... [2020-09-25 03:28:02,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:28:02,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:28:02,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:28:02,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:28:02,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:28:02,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:28:02,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:28:02,388 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 03:28:02,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 03:28:02,388 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:28:02,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:28:02,388 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 03:28:02,389 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 03:28:02,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 03:28:02,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 03:28:02,389 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:28:02,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:28:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:28:02,672 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:28:02,672 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 03:28:02,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:28:02 BoogieIcfgContainer [2020-09-25 03:28:02,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:28:02,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:28:02,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:28:02,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:28:02,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:28:01" (1/3) ... [2020-09-25 03:28:02,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392c488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:28:02, skipping insertion in model container [2020-09-25 03:28:02,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (2/3) ... [2020-09-25 03:28:02,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392c488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:28:02, skipping insertion in model container [2020-09-25 03:28:02,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:28:02" (3/3) ... [2020-09-25 03:28:02,690 INFO L109 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-09-25 03:28:02,704 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:28:02,715 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:28:02,745 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:28:02,780 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:28:02,781 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:28:02,781 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:28:02,781 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:28:02,781 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:28:02,782 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:28:02,782 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:28:02,782 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:28:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-09-25 03:28:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 03:28:02,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:02,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:02,819 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:02,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:02,827 INFO L82 PathProgramCache]: Analyzing trace with hash -980226087, now seen corresponding path program 1 times [2020-09-25 03:28:02,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:02,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128347483] [2020-09-25 03:28:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:03,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:03,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:03,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:03,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:03,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:03,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:03,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:03,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:03,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:03,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 03:28:03,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 03:28:03,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 968 [2020-09-25 03:28:03,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:03,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 03:28:03,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 03:28:03,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 03:28:03,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 03:28:04,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:04,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:04,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:04,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 03:28:04,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:04,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:28:04,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:04,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:04,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:04,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:04,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:04,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128347483] [2020-09-25 03:28:04,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:28:04,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 03:28:04,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218084888] [2020-09-25 03:28:04,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 03:28:04,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:04,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 03:28:04,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 03:28:04,168 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 9 states. [2020-09-25 03:28:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:04,787 INFO L93 Difference]: Finished difference Result 112 states and 143 transitions. [2020-09-25 03:28:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 03:28:04,789 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-09-25 03:28:04,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:04,802 INFO L225 Difference]: With dead ends: 112 [2020-09-25 03:28:04,803 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 03:28:04,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-25 03:28:04,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 03:28:04,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-09-25 03:28:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-25 03:28:04,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-09-25 03:28:04,868 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 34 [2020-09-25 03:28:04,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:04,869 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-09-25 03:28:04,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 03:28:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-09-25 03:28:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 03:28:04,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:04,871 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:04,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:28:04,872 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:04,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:04,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1377800797, now seen corresponding path program 1 times [2020-09-25 03:28:04,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:04,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51761023] [2020-09-25 03:28:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:04,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:04,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:05,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:05,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:05,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:05,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:05,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:05,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:05,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:06,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:06,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:06,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:06,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 03:28:06,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 03:28:06,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1963 [2020-09-25 03:28:06,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:06,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 03:28:06,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 03:28:06,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 03:28:06,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:06,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:06,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:06,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:06,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 03:28:06,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:06,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:06,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:06,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:06,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:06,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:06,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:06,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51761023] [2020-09-25 03:28:06,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:06,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 03:28:06,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303585571] [2020-09-25 03:28:06,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 03:28:06,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:06,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 03:28:06,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 03:28:06,987 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 11 states. [2020-09-25 03:28:07,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:07,613 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2020-09-25 03:28:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 03:28:07,615 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-09-25 03:28:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:07,617 INFO L225 Difference]: With dead ends: 119 [2020-09-25 03:28:07,618 INFO L226 Difference]: Without dead ends: 117 [2020-09-25 03:28:07,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2020-09-25 03:28:07,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-25 03:28:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2020-09-25 03:28:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-25 03:28:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2020-09-25 03:28:07,655 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 40 [2020-09-25 03:28:07,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:07,658 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2020-09-25 03:28:07,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 03:28:07,659 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2020-09-25 03:28:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 03:28:07,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:07,665 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:07,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:28:07,666 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:07,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:07,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1038172641, now seen corresponding path program 2 times [2020-09-25 03:28:07,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:07,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187871224] [2020-09-25 03:28:07,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:07,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:07,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:07,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:07,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:08,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:08,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:08,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:09,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:09,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:09,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:09,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:09,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:09,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:10,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:10,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:10,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:10,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:11,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:11,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:11,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:12,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:12,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 03:28:12,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-09-25 03:28:12,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 03:28:12,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:12,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 03:28:12,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 03:28:12,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 03:28:12,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:12,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:12,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:12,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:12,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 03:28:12,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:12,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:12,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:12,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:12,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:12,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:12,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:12,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187871224] [2020-09-25 03:28:12,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:12,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 03:28:12,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086132577] [2020-09-25 03:28:12,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 03:28:12,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:12,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 03:28:12,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-09-25 03:28:12,828 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 13 states. [2020-09-25 03:28:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:13,773 INFO L93 Difference]: Finished difference Result 149 states and 170 transitions. [2020-09-25 03:28:13,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 03:28:13,774 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-09-25 03:28:13,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:13,776 INFO L225 Difference]: With dead ends: 149 [2020-09-25 03:28:13,777 INFO L226 Difference]: Without dead ends: 147 [2020-09-25 03:28:13,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 03:28:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-25 03:28:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 113. [2020-09-25 03:28:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-25 03:28:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2020-09-25 03:28:13,806 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 46 [2020-09-25 03:28:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:13,806 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2020-09-25 03:28:13,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 03:28:13,807 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2020-09-25 03:28:13,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 03:28:13,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:13,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:13,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:28:13,809 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:13,810 INFO L82 PathProgramCache]: Analyzing trace with hash -475110064, now seen corresponding path program 1 times [2020-09-25 03:28:13,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:13,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842329477] [2020-09-25 03:28:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:13,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:13,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:14,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:15,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:16,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:17,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:17,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:17,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:18,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 03:28:18,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-09-25 03:28:18,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 03:28:18,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:18,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 03:28:18,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 03:28:18,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 03:28:18,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:18,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:18,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:18,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:18,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 03:28:18,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:18,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:28:18,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:18,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:18,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:18,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:18,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:18,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842329477] [2020-09-25 03:28:18,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:18,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 03:28:18,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632233449] [2020-09-25 03:28:18,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 03:28:18,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:18,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 03:28:18,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-09-25 03:28:18,984 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand 13 states. [2020-09-25 03:28:19,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:19,848 INFO L93 Difference]: Finished difference Result 189 states and 223 transitions. [2020-09-25 03:28:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-25 03:28:19,849 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-09-25 03:28:19,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:19,858 INFO L225 Difference]: With dead ends: 189 [2020-09-25 03:28:19,861 INFO L226 Difference]: Without dead ends: 187 [2020-09-25 03:28:19,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2020-09-25 03:28:19,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-25 03:28:19,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 154. [2020-09-25 03:28:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-25 03:28:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2020-09-25 03:28:19,918 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 46 [2020-09-25 03:28:19,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:19,918 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2020-09-25 03:28:19,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 03:28:19,919 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2020-09-25 03:28:19,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 03:28:19,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:19,921 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:19,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:28:19,921 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:19,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:19,921 INFO L82 PathProgramCache]: Analyzing trace with hash 918934774, now seen corresponding path program 1 times [2020-09-25 03:28:19,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:19,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18803011] [2020-09-25 03:28:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:19,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:19,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:20,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:20,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:20,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:20,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:20,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:20,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:20,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:20,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:23,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:24,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 03:28:24,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-09-25 03:28:24,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-25 03:28:24,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:24,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:28:24,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 03:28:24,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 03:28:24,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:25,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:25,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:25,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:25,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 03:28:25,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:25,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:28:25,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:25,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:25,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:25,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:25,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 03:28:25,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 03:28:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:25,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:25,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:25,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:28:25,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:25,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 03:28:25,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:25,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:28:25,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:25,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:28:25,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 03:28:25,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18803011] [2020-09-25 03:28:25,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:25,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 03:28:25,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750673507] [2020-09-25 03:28:25,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 03:28:25,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:25,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 03:28:25,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-25 03:28:25,101 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand 10 states. [2020-09-25 03:28:25,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:25,677 INFO L93 Difference]: Finished difference Result 301 states and 361 transitions. [2020-09-25 03:28:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 03:28:25,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-09-25 03:28:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:25,681 INFO L225 Difference]: With dead ends: 301 [2020-09-25 03:28:25,682 INFO L226 Difference]: Without dead ends: 299 [2020-09-25 03:28:25,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-09-25 03:28:25,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-25 03:28:25,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 196. [2020-09-25 03:28:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-09-25 03:28:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 239 transitions. [2020-09-25 03:28:25,726 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 239 transitions. Word has length 49 [2020-09-25 03:28:25,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:25,727 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 239 transitions. [2020-09-25 03:28:25,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 03:28:25,727 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 239 transitions. [2020-09-25 03:28:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 03:28:25,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:25,737 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:25,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 03:28:25,738 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1798560500, now seen corresponding path program 2 times [2020-09-25 03:28:25,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:25,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880745982] [2020-09-25 03:28:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:25,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:25,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:25,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:25,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:25,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:27,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:27,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:27,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:27,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:27,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:29,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:29,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:29,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:29,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:29,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:29,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:30,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 03:28:30,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 34 [2020-09-25 03:28:30,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 03:28:30,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:30,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 03:28:30,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 03:28:30,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 03:28:30,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:30,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:30,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:30,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 03:28:30,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:30,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:28:30,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:30,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:30,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:30,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:30,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:30,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 03:28:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:30,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:30,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:28:30,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:30,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 03:28:30,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:30,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 03:28:30,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:30,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 03:28:30,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:30,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 03:28:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:30,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:30,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:28:30,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:30,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 03:28:30,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:30,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:28:30,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:30,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:28:30,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 03:28:30,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880745982] [2020-09-25 03:28:30,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:30,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 03:28:30,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484342805] [2020-09-25 03:28:30,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 03:28:30,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:30,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 03:28:30,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-09-25 03:28:30,986 INFO L87 Difference]: Start difference. First operand 196 states and 239 transitions. Second operand 13 states. [2020-09-25 03:28:31,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:31,390 INFO L93 Difference]: Finished difference Result 340 states and 421 transitions. [2020-09-25 03:28:31,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 03:28:31,396 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-09-25 03:28:31,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:31,398 INFO L225 Difference]: With dead ends: 340 [2020-09-25 03:28:31,398 INFO L226 Difference]: Without dead ends: 173 [2020-09-25 03:28:31,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-25 03:28:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-25 03:28:31,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2020-09-25 03:28:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-25 03:28:31,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 206 transitions. [2020-09-25 03:28:31,435 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 206 transitions. Word has length 58 [2020-09-25 03:28:31,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:31,436 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 206 transitions. [2020-09-25 03:28:31,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 03:28:31,436 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 206 transitions. [2020-09-25 03:28:31,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 03:28:31,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:31,442 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:31,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 03:28:31,442 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:31,443 INFO L82 PathProgramCache]: Analyzing trace with hash -903211995, now seen corresponding path program 1 times [2020-09-25 03:28:31,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:31,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5348985] [2020-09-25 03:28:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:31,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:32,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:32,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:34,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:34,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:36,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-25 03:28:36,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-25 03:28:36,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 03:28:36,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:36,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:28:36,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 03:28:36,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 03:28:36,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:36,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:36,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:36,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 03:28:36,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:36,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:36,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:36,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:36,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:36,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:36,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:36,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 03:28:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:36,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:36,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:28:36,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:36,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:28:36,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:36,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:28:36,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:36,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:28:36,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:36,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-25 03:28:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:36,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:36,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:28:36,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:36,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 03:28:36,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:36,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:28:36,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:36,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:28:36,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:36,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 03:28:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:36,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:36,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:28:36,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:36,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:28:36,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:36,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:36,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 03:28:36,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:36,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-25 03:28:36,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5348985] [2020-09-25 03:28:36,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:36,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 03:28:36,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484933648] [2020-09-25 03:28:36,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 03:28:36,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:36,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 03:28:36,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-25 03:28:36,588 INFO L87 Difference]: Start difference. First operand 170 states and 206 transitions. Second operand 10 states. [2020-09-25 03:28:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:37,069 INFO L93 Difference]: Finished difference Result 297 states and 363 transitions. [2020-09-25 03:28:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 03:28:37,069 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-09-25 03:28:37,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:37,073 INFO L225 Difference]: With dead ends: 297 [2020-09-25 03:28:37,073 INFO L226 Difference]: Without dead ends: 167 [2020-09-25 03:28:37,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-09-25 03:28:37,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-25 03:28:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 144. [2020-09-25 03:28:37,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-25 03:28:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 169 transitions. [2020-09-25 03:28:37,094 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 169 transitions. Word has length 79 [2020-09-25 03:28:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:37,095 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 169 transitions. [2020-09-25 03:28:37,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 03:28:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 169 transitions. [2020-09-25 03:28:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-25 03:28:37,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:37,097 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:37,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 03:28:37,097 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:37,098 INFO L82 PathProgramCache]: Analyzing trace with hash 2053224481, now seen corresponding path program 2 times [2020-09-25 03:28:37,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:37,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619968036] [2020-09-25 03:28:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:37,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:37,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:37,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:37,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:37,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:37,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:37,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:38,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:38,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:38,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:38,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:38,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:38,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:42,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-25 03:28:42,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-25 03:28:42,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 03:28:42,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:42,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 03:28:42,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-25 03:28:42,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 03:28:42,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:42,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:42,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:42,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 03:28:42,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:42,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:42,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:42,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:42,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-25 03:28:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:42,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:42,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:28:42,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:42,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:28:42,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:42,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:28:42,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:42,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:28:42,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:42,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-25 03:28:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:42,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:42,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:28:42,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:42,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:28:42,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:42,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:42,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 03:28:42,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:42,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:42,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-25 03:28:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:42,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:42,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:28:42,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:42,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:28:42,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:42,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:42,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 03:28:42,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:42,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-25 03:28:42,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619968036] [2020-09-25 03:28:42,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:42,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 03:28:42,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152016617] [2020-09-25 03:28:42,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 03:28:42,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:42,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 03:28:42,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-25 03:28:42,241 INFO L87 Difference]: Start difference. First operand 144 states and 169 transitions. Second operand 11 states. [2020-09-25 03:28:42,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:42,835 INFO L93 Difference]: Finished difference Result 296 states and 357 transitions. [2020-09-25 03:28:42,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 03:28:42,836 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-09-25 03:28:42,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:42,837 INFO L225 Difference]: With dead ends: 296 [2020-09-25 03:28:42,838 INFO L226 Difference]: Without dead ends: 179 [2020-09-25 03:28:42,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-25 03:28:42,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-25 03:28:42,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 171. [2020-09-25 03:28:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-25 03:28:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 202 transitions. [2020-09-25 03:28:42,860 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 202 transitions. Word has length 85 [2020-09-25 03:28:42,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:42,861 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 202 transitions. [2020-09-25 03:28:42,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 03:28:42,861 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 202 transitions. [2020-09-25 03:28:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-25 03:28:42,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:42,862 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:42,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 03:28:42,863 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:42,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:42,863 INFO L82 PathProgramCache]: Analyzing trace with hash 909874190, now seen corresponding path program 3 times [2020-09-25 03:28:42,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:42,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889063334] [2020-09-25 03:28:42,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:42,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:43,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:44,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:44,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:45,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:45,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:45,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:45,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:47,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:47,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:47,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:47,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-25 03:28:47,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-09-25 03:28:47,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 03:28:47,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:47,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 03:28:47,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 03:28:47,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-25 03:28:47,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:47,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:47,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:47,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:47,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 03:28:47,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:47,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:47,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:47,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:47,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:47,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:47,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:47,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-25 03:28:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:48,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:48,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:48,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:28:48,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:48,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 03:28:48,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:48,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:28:48,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:48,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:28:48,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:48,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-25 03:28:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:48,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:48,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:48,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:28:48,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:48,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:28:48,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:48,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:48,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 03:28:48,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:48,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:48,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-25 03:28:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:48,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:48,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:48,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:28:48,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:48,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:28:48,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:48,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:48,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 03:28:48,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:48,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 32 proven. 38 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-25 03:28:48,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889063334] [2020-09-25 03:28:48,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:48,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 03:28:48,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636364240] [2020-09-25 03:28:48,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 03:28:48,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:48,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 03:28:48,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-09-25 03:28:48,036 INFO L87 Difference]: Start difference. First operand 171 states and 202 transitions. Second operand 13 states. [2020-09-25 03:28:48,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:48,803 INFO L93 Difference]: Finished difference Result 334 states and 412 transitions. [2020-09-25 03:28:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-25 03:28:48,805 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 91 [2020-09-25 03:28:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:48,807 INFO L225 Difference]: With dead ends: 334 [2020-09-25 03:28:48,808 INFO L226 Difference]: Without dead ends: 240 [2020-09-25 03:28:48,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-09-25 03:28:48,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-25 03:28:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 217. [2020-09-25 03:28:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-09-25 03:28:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 263 transitions. [2020-09-25 03:28:48,834 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 263 transitions. Word has length 91 [2020-09-25 03:28:48,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:48,834 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 263 transitions. [2020-09-25 03:28:48,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 03:28:48,834 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 263 transitions. [2020-09-25 03:28:48,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-25 03:28:48,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:48,836 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:48,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 03:28:48,837 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:48,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:48,837 INFO L82 PathProgramCache]: Analyzing trace with hash 642219639, now seen corresponding path program 4 times [2020-09-25 03:28:48,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:48,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861432347] [2020-09-25 03:28:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:48,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:48,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:48,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:48,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:48,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:48,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:49,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:49,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:50,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:51,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking...