/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=LOWLEXORDER --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-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:50:17,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:50:17,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:50:17,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:50:17,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:50:17,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:50:17,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:50:17,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:50:17,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:50:17,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:50:17,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:50:17,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:50:17,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:50:17,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:50:17,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:50:17,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:50:17,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:50:17,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:50:17,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:50:17,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:50:17,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:50:17,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:50:17,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:50:17,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:50:17,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:50:17,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:50:17,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:50:17,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:50:17,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:50:17,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:50:17,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:50:17,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:50:17,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:50:17,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:50:17,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:50:17,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:50:17,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:50:17,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:50:17,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:50:17,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:50:17,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:50:17,547 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 [2020-09-24 21:50:17,573 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:50:17,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:50:17,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:50:17,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:50:17,575 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:50:17,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:50:17,575 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:50:17,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:50:17,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:50:17,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:50:17,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:50:17,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:50:17,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:50:17,577 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:50:17,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:50:17,577 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:50:17,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:50:17,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:50:17,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:50:17,578 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:50:17,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:50:17,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:50:17,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:50:17,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:50:17,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:50:17,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:50:17,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:50:17,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:50:17,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:50:17,580 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:50:18,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:50:18,030 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:50:18,034 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:50:18,035 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:50:18,036 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:50:18,037 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-24 21:50:18,108 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d743bc81a/8ea5edf88f7f4ad9bd4ca5c56a055ece/FLAGf5cc7550d [2020-09-24 21:50:18,617 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:50:18,618 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-24 21:50:18,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d743bc81a/8ea5edf88f7f4ad9bd4ca5c56a055ece/FLAGf5cc7550d [2020-09-24 21:50:18,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d743bc81a/8ea5edf88f7f4ad9bd4ca5c56a055ece [2020-09-24 21:50:18,973 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:50:18,979 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:50:18,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:50:18,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:50:18,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:50:18,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:50:18" (1/1) ... [2020-09-24 21:50:18,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e8d9ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:18, skipping insertion in model container [2020-09-24 21:50:18,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:50:18" (1/1) ... [2020-09-24 21:50:19,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:50:19,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:50:19,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:50:19,257 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:50:19,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:50:19,299 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:50:19,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:19 WrapperNode [2020-09-24 21:50:19,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:50:19,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:50:19,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:50:19,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:50:19,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:19" (1/1) ... [2020-09-24 21:50:19,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:19" (1/1) ... [2020-09-24 21:50:19,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:19" (1/1) ... [2020-09-24 21:50:19,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:19" (1/1) ... [2020-09-24 21:50:19,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:19" (1/1) ... [2020-09-24 21:50:19,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:19" (1/1) ... [2020-09-24 21:50:19,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:19" (1/1) ... [2020-09-24 21:50:19,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:50:19,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:50:19,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:50:19,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:50:19,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:19" (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 [2020-09-24 21:50:19,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:50:19,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:50:19,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:50:19,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:50:19,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:50:19,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:50:19,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:50:19,499 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:50:19,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:50:19,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:50:19,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:50:19,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:50:19,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:50:19,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:50:19,737 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:50:19,737 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 21:50:19,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:50:19 BoogieIcfgContainer [2020-09-24 21:50:19,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:50:19,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:50:19,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:50:19,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:50:19,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:50:18" (1/3) ... [2020-09-24 21:50:19,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f496f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:50:19, skipping insertion in model container [2020-09-24 21:50:19,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:19" (2/3) ... [2020-09-24 21:50:19,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f496f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:50:19, skipping insertion in model container [2020-09-24 21:50:19,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:50:19" (3/3) ... [2020-09-24 21:50:19,776 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-09-24 21:50:19,789 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:50:19,799 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:50:19,834 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:50:19,862 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:50:19,863 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:50:19,863 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:50:19,863 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:50:19,863 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:50:19,863 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:50:19,863 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:50:19,863 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:50:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-09-24 21:50:19,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 21:50:19,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:19,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:19,893 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:19,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:19,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2145994368, now seen corresponding path program 1 times [2020-09-24 21:50:19,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:19,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135447088] [2020-09-24 21:50:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:20,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:20,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 21:50:20,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:50:20,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-09-24 21:50:20,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:20,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:20,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:50:20,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:20,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:50:20,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:20,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:20,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:20,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:20,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:50:20,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:20,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:20,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:20,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:20,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:20,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135447088] [2020-09-24 21:50:20,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:20,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 21:50:20,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263753221] [2020-09-24 21:50:20,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 21:50:20,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:20,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 21:50:20,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:50:20,485 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-09-24 21:50:20,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:20,630 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-09-24 21:50:20,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 21:50:20,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-24 21:50:20,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:20,644 INFO L225 Difference]: With dead ends: 61 [2020-09-24 21:50:20,644 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 21:50:20,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:50:20,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 21:50:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-24 21:50:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-24 21:50:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-09-24 21:50:20,699 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-09-24 21:50:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:20,699 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-09-24 21:50:20,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 21:50:20,700 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-09-24 21:50:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-24 21:50:20,701 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:20,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:20,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:50:20,702 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:20,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:20,703 INFO L82 PathProgramCache]: Analyzing trace with hash 2141881988, now seen corresponding path program 1 times [2020-09-24 21:50:20,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:20,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270908173] [2020-09-24 21:50:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:20,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:20,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 21:50:20,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:20,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-09-24 21:50:20,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:20,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:50:20,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 21:50:20,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:50:20,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:20,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:20,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:20,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:20,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:50:20,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:20,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:20,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:20,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:20,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:20,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270908173] [2020-09-24 21:50:20,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:20,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 21:50:20,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244675316] [2020-09-24 21:50:20,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:50:20,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:20,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:50:20,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:50:20,998 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-09-24 21:50:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:21,111 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-09-24 21:50:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 21:50:21,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-09-24 21:50:21,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:21,116 INFO L225 Difference]: With dead ends: 59 [2020-09-24 21:50:21,116 INFO L226 Difference]: Without dead ends: 45 [2020-09-24 21:50:21,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:50:21,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-24 21:50:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2020-09-24 21:50:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 21:50:21,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-24 21:50:21,129 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 19 [2020-09-24 21:50:21,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:21,129 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-24 21:50:21,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:50:21,130 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-24 21:50:21,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 21:50:21,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:21,131 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] [2020-09-24 21:50:21,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:50:21,132 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:21,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:21,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1000622251, now seen corresponding path program 1 times [2020-09-24 21:50:21,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:21,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415725030] [2020-09-24 21:50:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:21,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:21,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 21:50:21,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:21,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-09-24 21:50:21,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:21,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:50:21,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:21,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:50:21,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:21,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:21,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:21,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:21,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:21,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:50:21,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:21,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:21,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:21,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:21,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:21,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415725030] [2020-09-24 21:50:21,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:21,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:50:21,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338660994] [2020-09-24 21:50:21,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:50:21,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:21,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:50:21,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:50:21,643 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 6 states. [2020-09-24 21:50:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:21,807 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-09-24 21:50:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:50:21,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-09-24 21:50:21,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:21,811 INFO L225 Difference]: With dead ends: 70 [2020-09-24 21:50:21,811 INFO L226 Difference]: Without dead ends: 52 [2020-09-24 21:50:21,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:50:21,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-24 21:50:21,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-09-24 21:50:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-24 21:50:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-09-24 21:50:21,831 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2020-09-24 21:50:21,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:21,832 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-09-24 21:50:21,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:50:21,832 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-09-24 21:50:21,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 21:50:21,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:21,834 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:50:21,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:50:21,835 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:21,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:21,835 INFO L82 PathProgramCache]: Analyzing trace with hash 231352676, now seen corresponding path program 2 times [2020-09-24 21:50:21,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:21,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278344388] [2020-09-24 21:50:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:21,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:22,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:22,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 21:50:22,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:22,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-09-24 21:50:22,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:22,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:50:22,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:22,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:50:22,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:22,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:22,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:22,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:22,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:22,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:22,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:50:22,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:22,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:22,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:22,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:22,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:22,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278344388] [2020-09-24 21:50:22,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:22,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 21:50:22,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137055484] [2020-09-24 21:50:22,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:50:22,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:22,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:50:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:50:22,444 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 8 states. [2020-09-24 21:50:22,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:22,689 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-09-24 21:50:22,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:50:22,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-24 21:50:22,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:22,692 INFO L225 Difference]: With dead ends: 77 [2020-09-24 21:50:22,694 INFO L226 Difference]: Without dead ends: 59 [2020-09-24 21:50:22,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:22,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-24 21:50:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2020-09-24 21:50:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 21:50:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-09-24 21:50:22,710 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 33 [2020-09-24 21:50:22,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:22,710 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-09-24 21:50:22,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:50:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-09-24 21:50:22,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 21:50:22,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:22,715 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:50:22,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:50:22,715 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:22,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:22,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1221138549, now seen corresponding path program 3 times [2020-09-24 21:50:22,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:22,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007200094] [2020-09-24 21:50:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:22,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:22,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:23,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:23,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 21:50:23,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:23,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-09-24 21:50:23,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:23,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:50:23,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:23,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:50:23,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:23,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:23,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:23,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:23,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:23,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:23,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:23,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:23,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:23,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:23,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:23,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:23,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007200094] [2020-09-24 21:50:23,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:23,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:50:23,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211252701] [2020-09-24 21:50:23,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:50:23,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:23,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:50:23,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:50:23,620 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 10 states. [2020-09-24 21:50:23,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:23,838 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-09-24 21:50:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 21:50:23,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-09-24 21:50:23,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:23,840 INFO L225 Difference]: With dead ends: 84 [2020-09-24 21:50:23,840 INFO L226 Difference]: Without dead ends: 66 [2020-09-24 21:50:23,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:50:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-24 21:50:23,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-09-24 21:50:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 21:50:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-09-24 21:50:23,849 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 40 [2020-09-24 21:50:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:23,849 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-09-24 21:50:23,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:50:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-09-24 21:50:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 21:50:23,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:23,851 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:23,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:50:23,851 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:23,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:23,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1927496772, now seen corresponding path program 4 times [2020-09-24 21:50:23,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:23,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172611743] [2020-09-24 21:50:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:23,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:23,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:24,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:24,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-24 21:50:24,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:24,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1094 [2020-09-24 21:50:24,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:50:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:24,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 21:50:24,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:25,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:25,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:25,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:25,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:25,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:25,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:25,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:25,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:25,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:25,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:25,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:25,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172611743] [2020-09-24 21:50:25,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:25,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:50:25,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836053760] [2020-09-24 21:50:25,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:50:25,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:25,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:50:25,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:25,091 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 12 states. [2020-09-24 21:50:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:25,363 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2020-09-24 21:50:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 21:50:25,363 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-09-24 21:50:25,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:25,364 INFO L225 Difference]: With dead ends: 91 [2020-09-24 21:50:25,367 INFO L226 Difference]: Without dead ends: 73 [2020-09-24 21:50:25,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:50:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-24 21:50:25,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-09-24 21:50:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 21:50:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-09-24 21:50:25,385 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 47 [2020-09-24 21:50:25,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:25,386 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-09-24 21:50:25,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:50:25,386 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-09-24 21:50:25,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-24 21:50:25,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:25,387 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:25,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:50:25,388 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:25,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:25,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1764098453, now seen corresponding path program 5 times [2020-09-24 21:50:25,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:25,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308282936] [2020-09-24 21:50:25,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:25,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:25,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:26,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:26,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 21:50:26,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:26,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1270 [2020-09-24 21:50:26,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:26,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:50:26,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:26,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 21:50:26,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:26,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:26,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:26,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:26,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:26,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:26,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:50:26,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:26,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:26,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:26,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:26,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:26,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308282936] [2020-09-24 21:50:26,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:26,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 21:50:26,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315482804] [2020-09-24 21:50:26,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 21:50:26,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:26,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 21:50:26,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-24 21:50:26,830 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 14 states. [2020-09-24 21:50:27,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:27,076 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-09-24 21:50:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 21:50:27,076 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-09-24 21:50:27,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:27,078 INFO L225 Difference]: With dead ends: 98 [2020-09-24 21:50:27,078 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 21:50:27,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-24 21:50:27,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 21:50:27,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2020-09-24 21:50:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-24 21:50:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-09-24 21:50:27,087 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 54 [2020-09-24 21:50:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:27,087 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-09-24 21:50:27,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 21:50:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-09-24 21:50:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 21:50:27,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:27,089 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:27,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:50:27,089 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:27,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1627641636, now seen corresponding path program 6 times [2020-09-24 21:50:27,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:27,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099677525] [2020-09-24 21:50:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:27,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:27,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:28,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:28,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 21:50:28,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:28,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-09-24 21:50:28,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:28,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:50:28,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:28,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 21:50:28,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:28,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:28,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:28,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:28,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:28,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:28,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:50:28,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:28,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:28,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:28,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:28,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:28,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099677525] [2020-09-24 21:50:28,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:28,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:50:28,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740645415] [2020-09-24 21:50:28,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:50:28,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:28,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:50:28,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:50:28,548 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 16 states. [2020-09-24 21:50:29,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:29,018 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2020-09-24 21:50:29,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 21:50:29,020 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-09-24 21:50:29,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:29,022 INFO L225 Difference]: With dead ends: 105 [2020-09-24 21:50:29,024 INFO L226 Difference]: Without dead ends: 87 [2020-09-24 21:50:29,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-24 21:50:29,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-24 21:50:29,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2020-09-24 21:50:29,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-24 21:50:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-09-24 21:50:29,043 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 61 [2020-09-24 21:50:29,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:29,047 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-09-24 21:50:29,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:50:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-09-24 21:50:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-24 21:50:29,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:29,055 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:29,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:50:29,056 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:29,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1482394955, now seen corresponding path program 7 times [2020-09-24 21:50:29,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:29,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067808317] [2020-09-24 21:50:29,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:29,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:29,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:30,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:30,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-24 21:50:30,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:30,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1536 [2020-09-24 21:50:30,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:30,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:50:30,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:30,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 21:50:30,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:30,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:30,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:30,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:30,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:30,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:30,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:50:30,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:30,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:30,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:30,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:30,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:30,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067808317] [2020-09-24 21:50:30,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:30,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 21:50:30,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348454642] [2020-09-24 21:50:30,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:50:30,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:30,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:50:30,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:50:30,978 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 18 states. [2020-09-24 21:50:31,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:31,318 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-09-24 21:50:31,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:50:31,318 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-09-24 21:50:31,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:31,319 INFO L225 Difference]: With dead ends: 112 [2020-09-24 21:50:31,320 INFO L226 Difference]: Without dead ends: 94 [2020-09-24 21:50:31,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:50:31,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-24 21:50:31,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2020-09-24 21:50:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 21:50:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-09-24 21:50:31,339 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 68 [2020-09-24 21:50:31,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:31,340 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-09-24 21:50:31,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:50:31,341 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-09-24 21:50:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-24 21:50:31,343 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:31,343 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:31,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:50:31,344 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:31,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:31,344 INFO L82 PathProgramCache]: Analyzing trace with hash -642129404, now seen corresponding path program 8 times [2020-09-24 21:50:31,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:31,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739940699] [2020-09-24 21:50:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:31,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:31,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:33,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:33,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 21:50:33,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:33,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1999 [2020-09-24 21:50:33,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:33,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:50:33,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:33,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-24 21:50:33,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:33,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:33,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:33,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:33,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:33,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:33,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:50:33,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:33,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:33,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:33,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:33,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:33,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739940699] [2020-09-24 21:50:33,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:33,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:50:33,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327807977] [2020-09-24 21:50:33,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:50:33,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:33,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:50:33,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:50:33,642 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 20 states. [2020-09-24 21:50:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:34,047 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2020-09-24 21:50:34,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 21:50:34,048 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2020-09-24 21:50:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:34,049 INFO L225 Difference]: With dead ends: 119 [2020-09-24 21:50:34,049 INFO L226 Difference]: Without dead ends: 101 [2020-09-24 21:50:34,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 21:50:34,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-24 21:50:34,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2020-09-24 21:50:34,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-24 21:50:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-09-24 21:50:34,061 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 75 [2020-09-24 21:50:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:34,061 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-09-24 21:50:34,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:50:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-09-24 21:50:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-24 21:50:34,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:34,067 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:34,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:50:34,067 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:34,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:34,068 INFO L82 PathProgramCache]: Analyzing trace with hash -956929067, now seen corresponding path program 9 times [2020-09-24 21:50:34,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:34,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867761752] [2020-09-24 21:50:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:34,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:34,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:36,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:36,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-24 21:50:36,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:36,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2049 [2020-09-24 21:50:36,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:50:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-24 21:50:36,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:36,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:36,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:36,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:36,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:36,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:36,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:36,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:36,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:36,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:36,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:36,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:36,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867761752] [2020-09-24 21:50:36,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:36,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 21:50:36,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179359619] [2020-09-24 21:50:36,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 21:50:36,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:36,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 21:50:36,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-24 21:50:36,411 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 22 states. [2020-09-24 21:50:37,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:37,017 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-09-24 21:50:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 21:50:37,018 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2020-09-24 21:50:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:37,019 INFO L225 Difference]: With dead ends: 126 [2020-09-24 21:50:37,019 INFO L226 Difference]: Without dead ends: 108 [2020-09-24 21:50:37,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 21:50:37,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-24 21:50:37,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2020-09-24 21:50:37,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-24 21:50:37,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-09-24 21:50:37,031 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 82 [2020-09-24 21:50:37,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:37,032 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-09-24 21:50:37,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 21:50:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-09-24 21:50:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 21:50:37,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:37,033 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:37,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:50:37,033 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:37,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:37,038 INFO L82 PathProgramCache]: Analyzing trace with hash 236152036, now seen corresponding path program 10 times [2020-09-24 21:50:37,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:37,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763867418] [2020-09-24 21:50:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:37,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:37,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:39,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:39,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-24 21:50:39,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:39,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2295 [2020-09-24 21:50:39,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:39,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:50:39,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:39,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:50:39,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:39,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:39,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:39,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:39,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:39,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:39,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:39,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:39,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:39,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:39,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:39,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:39,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763867418] [2020-09-24 21:50:39,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:39,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 21:50:39,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998739604] [2020-09-24 21:50:39,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 21:50:39,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:39,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 21:50:39,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-24 21:50:39,682 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 24 states. [2020-09-24 21:50:40,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:40,316 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2020-09-24 21:50:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:50:40,317 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-09-24 21:50:40,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:40,318 INFO L225 Difference]: With dead ends: 133 [2020-09-24 21:50:40,318 INFO L226 Difference]: Without dead ends: 115 [2020-09-24 21:50:40,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 21:50:40,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-24 21:50:40,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2020-09-24 21:50:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-24 21:50:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2020-09-24 21:50:40,331 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 89 [2020-09-24 21:50:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:40,331 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2020-09-24 21:50:40,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 21:50:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2020-09-24 21:50:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 21:50:40,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:40,332 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:40,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 21:50:40,333 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:40,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:40,334 INFO L82 PathProgramCache]: Analyzing trace with hash -363991819, now seen corresponding path program 11 times [2020-09-24 21:50:40,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:40,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527371814] [2020-09-24 21:50:40,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:40,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:40,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:42,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:42,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-24 21:50:42,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:42,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2519 [2020-09-24 21:50:42,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:42,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 21:50:42,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:42,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:50:42,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:43,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:43,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:43,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:43,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:43,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:43,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:50:43,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:43,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:43,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527371814] [2020-09-24 21:50:43,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:43,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 21:50:43,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003083592] [2020-09-24 21:50:43,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 21:50:43,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:43,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 21:50:43,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-24 21:50:43,232 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 26 states. [2020-09-24 21:50:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:43,887 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-09-24 21:50:43,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-24 21:50:43,888 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 96 [2020-09-24 21:50:43,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:43,890 INFO L225 Difference]: With dead ends: 140 [2020-09-24 21:50:43,890 INFO L226 Difference]: Without dead ends: 122 [2020-09-24 21:50:43,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-24 21:50:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-24 21:50:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2020-09-24 21:50:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-24 21:50:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2020-09-24 21:50:43,896 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 96 [2020-09-24 21:50:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:43,896 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2020-09-24 21:50:43,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 21:50:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2020-09-24 21:50:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-24 21:50:43,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:43,898 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:43,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 21:50:43,898 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:43,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:43,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1050566596, now seen corresponding path program 12 times [2020-09-24 21:50:43,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:43,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918878546] [2020-09-24 21:50:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:43,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:44,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:46,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:46,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-24 21:50:46,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:46,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2854 [2020-09-24 21:50:46,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:46,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 21:50:46,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:46,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 21:50:46,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:47,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:47,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:47,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:47,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:47,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:47,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:50:47,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:47,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:47,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:47,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:47,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:47,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918878546] [2020-09-24 21:50:47,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:47,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 21:50:47,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947745727] [2020-09-24 21:50:47,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 21:50:47,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:47,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 21:50:47,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-24 21:50:47,244 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 28 states. [2020-09-24 21:50:48,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:48,057 INFO L93 Difference]: Finished difference Result 147 states and 153 transitions. [2020-09-24 21:50:48,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 21:50:48,058 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 103 [2020-09-24 21:50:48,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:48,059 INFO L225 Difference]: With dead ends: 147 [2020-09-24 21:50:48,059 INFO L226 Difference]: Without dead ends: 129 [2020-09-24 21:50:48,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-24 21:50:48,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-24 21:50:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2020-09-24 21:50:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-24 21:50:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2020-09-24 21:50:48,068 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 103 [2020-09-24 21:50:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:48,069 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2020-09-24 21:50:48,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 21:50:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2020-09-24 21:50:48,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-24 21:50:48,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:48,071 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:48,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 21:50:48,071 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:48,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1252198891, now seen corresponding path program 13 times [2020-09-24 21:50:48,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:48,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598881881] [2020-09-24 21:50:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:48,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:48,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:51,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:51,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-24 21:50:51,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:51,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3536 [2020-09-24 21:50:51,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:51,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 21:50:51,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:51,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-24 21:50:51,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:52,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:52,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:52,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:52,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:52,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:52,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:52,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:52,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:52,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:52,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:52,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:52,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598881881] [2020-09-24 21:50:52,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:52,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-24 21:50:52,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477456372] [2020-09-24 21:50:52,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-24 21:50:52,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:52,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-24 21:50:52,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-24 21:50:52,126 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand 30 states. [2020-09-24 21:50:53,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:53,044 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2020-09-24 21:50:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-24 21:50:53,044 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 110 [2020-09-24 21:50:53,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:53,049 INFO L225 Difference]: With dead ends: 154 [2020-09-24 21:50:53,049 INFO L226 Difference]: Without dead ends: 136 [2020-09-24 21:50:53,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-24 21:50:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-24 21:50:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 127. [2020-09-24 21:50:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-24 21:50:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-09-24 21:50:53,056 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 110 [2020-09-24 21:50:53,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:53,057 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-09-24 21:50:53,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-24 21:50:53,057 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-09-24 21:50:53,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-09-24 21:50:53,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:53,058 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:53,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 21:50:53,059 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:53,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1687629148, now seen corresponding path program 14 times [2020-09-24 21:50:53,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:53,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439876076] [2020-09-24 21:50:53,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:53,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:53,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:56,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:56,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-09-24 21:50:56,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:56,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3187 [2020-09-24 21:50:56,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:56,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 21:50:56,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:56,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-24 21:50:56,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:56,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:56,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:56,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:56,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:56,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:56,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:50:56,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:56,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:56,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:56,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:56,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:56,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439876076] [2020-09-24 21:50:56,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:56,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-24 21:50:56,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328532104] [2020-09-24 21:50:56,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-24 21:50:56,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:56,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-24 21:50:56,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:50:56,842 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand 32 states. [2020-09-24 21:50:57,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:57,980 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2020-09-24 21:50:57,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-24 21:50:57,981 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 117 [2020-09-24 21:50:57,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:57,982 INFO L225 Difference]: With dead ends: 161 [2020-09-24 21:50:57,982 INFO L226 Difference]: Without dead ends: 143 [2020-09-24 21:50:57,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-24 21:50:57,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-24 21:50:57,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 134. [2020-09-24 21:50:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-24 21:50:57,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2020-09-24 21:50:57,994 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 117 [2020-09-24 21:50:57,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:57,995 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2020-09-24 21:50:57,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-24 21:50:57,995 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2020-09-24 21:50:57,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-24 21:50:57,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:57,997 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:57,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 21:50:57,997 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:57,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:57,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1817544501, now seen corresponding path program 15 times [2020-09-24 21:50:57,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:57,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475061710] [2020-09-24 21:50:57,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:58,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:58,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:01,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:01,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-09-24 21:51:01,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:51:01,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3610 [2020-09-24 21:51:01,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 21:51:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:51:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-09-24 21:51:01,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:02,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:02,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:02,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:02,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:51:02,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:02,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:51:02,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:02,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:02,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:02,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:02,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:02,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475061710] [2020-09-24 21:51:02,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:02,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-24 21:51:02,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721921324] [2020-09-24 21:51:02,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-24 21:51:02,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:02,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-24 21:51:02,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 21:51:02,311 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand 34 states. [2020-09-24 21:51:03,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:03,525 INFO L93 Difference]: Finished difference Result 168 states and 174 transitions. [2020-09-24 21:51:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-24 21:51:03,525 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 124 [2020-09-24 21:51:03,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:03,527 INFO L225 Difference]: With dead ends: 168 [2020-09-24 21:51:03,527 INFO L226 Difference]: Without dead ends: 150 [2020-09-24 21:51:03,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-24 21:51:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-24 21:51:03,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 141. [2020-09-24 21:51:03,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-24 21:51:03,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2020-09-24 21:51:03,545 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 124 [2020-09-24 21:51:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:03,545 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2020-09-24 21:51:03,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-24 21:51:03,546 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2020-09-24 21:51:03,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-24 21:51:03,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:03,547 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:03,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 21:51:03,548 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:03,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:03,548 INFO L82 PathProgramCache]: Analyzing trace with hash 604028292, now seen corresponding path program 16 times [2020-09-24 21:51:03,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:03,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904104436] [2020-09-24 21:51:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:03,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:03,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:07,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:07,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-09-24 21:51:07,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:51:07,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3963 [2020-09-24 21:51:07,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:07,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 21:51:07,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:51:07,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-09-24 21:51:07,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0