/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=HIGHLEXORDER --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-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 22:56:51,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:56:51,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:56:51,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:56:51,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:56:51,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:56:51,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:56:51,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:56:51,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:56:51,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:56:51,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:56:51,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:56:51,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:56:51,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:56:51,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:56:51,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:56:51,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:56:51,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:56:51,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:56:51,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:56:51,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:56:51,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:56:51,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:56:51,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:56:51,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:56:51,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:56:51,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:56:51,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:56:51,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:56:51,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:56:51,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:56:51,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:56:51,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:56:51,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:56:51,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:56:51,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:56:51,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:56:51,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:56:51,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:56:51,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:56:51,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:56:51,478 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 22:56:51,535 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:56:51,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:56:51,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:56:51,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:56:51,538 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:56:51,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:56:51,541 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:56:51,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:56:51,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:56:51,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:56:51,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:56:51,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:56:51,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:56:51,542 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:56:51,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:56:51,543 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:56:51,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:56:51,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:56:51,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:56:51,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:56:51,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:56:51,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:56:51,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:56:51,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:56:51,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:56:51,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:56:51,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:56:51,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:56:51,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:56:51,546 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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:56:52,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:56:52,041 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:56:52,047 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:56:52,050 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:56:52,051 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:56:52,052 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-24 22:56:52,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e71f198ae/f4828696626546d8852816b778b9d0bd/FLAGbb88ea72b [2020-09-24 22:56:52,646 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:56:52,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-24 22:56:52,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e71f198ae/f4828696626546d8852816b778b9d0bd/FLAGbb88ea72b [2020-09-24 22:56:52,969 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e71f198ae/f4828696626546d8852816b778b9d0bd [2020-09-24 22:56:52,982 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:56:52,988 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:56:52,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:56:52,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:56:52,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:56:52,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:56:52" (1/1) ... [2020-09-24 22:56:52,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4546e395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:56:52, skipping insertion in model container [2020-09-24 22:56:52,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:56:52" (1/1) ... [2020-09-24 22:56:53,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:56:53,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:56:53,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:56:53,272 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:56:53,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:56:53,310 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:56:53,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:56:53 WrapperNode [2020-09-24 22:56:53,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:56:53,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:56:53,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:56:53,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:56:53,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:56:53" (1/1) ... [2020-09-24 22:56:53,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:56:53" (1/1) ... [2020-09-24 22:56:53,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:56:53" (1/1) ... [2020-09-24 22:56:53,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:56:53" (1/1) ... [2020-09-24 22:56:53,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:56:53" (1/1) ... [2020-09-24 22:56:53,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:56:53" (1/1) ... [2020-09-24 22:56:53,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:56:53" (1/1) ... [2020-09-24 22:56:53,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:56:53,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:56:53,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:56:53,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:56:53,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:56:53" (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 22:56:53,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:56:53,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:56:53,549 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 22:56:53,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 22:56:53,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:56:53,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:56:53,550 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 22:56:53,550 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 22:56:53,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 22:56:53,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 22:56:53,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:56:53,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:56:53,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:56:53,816 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:56:53,817 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 22:56:53,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:56:53 BoogieIcfgContainer [2020-09-24 22:56:53,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:56:53,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:56:53,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:56:53,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:56:53,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:56:52" (1/3) ... [2020-09-24 22:56:53,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b06897d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:56:53, skipping insertion in model container [2020-09-24 22:56:53,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:56:53" (2/3) ... [2020-09-24 22:56:53,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b06897d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:56:53, skipping insertion in model container [2020-09-24 22:56:53,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:56:53" (3/3) ... [2020-09-24 22:56:53,854 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-09-24 22:56:53,864 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:56:53,872 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:56:53,893 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:56:53,923 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:56:53,923 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:56:53,923 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:56:53,923 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:56:53,924 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:56:53,924 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:56:53,924 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:56:53,924 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:56:53,947 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-24 22:56:53,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 22:56:53,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:56:53,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:56:53,956 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:56:53,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:56:53,962 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-09-24 22:56:53,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:56:53,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001193027] [2020-09-24 22:56:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:56:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:54,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:54,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:54,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:54,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 22:56:54,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 22:56:54,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-24 22:56:54,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:54,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:54,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 22:56:54,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:54,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 22:56:54,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:56:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:54,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:54,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:54,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:56:54,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:54,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 22:56:54,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:54,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:54,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:54,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:54,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:54,209 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 22:56:54,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001193027] [2020-09-24 22:56:54,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:56:54,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 22:56:54,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111513618] [2020-09-24 22:56:54,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 22:56:54,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:56:54,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 22:56:54,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 22:56:54,240 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-24 22:56:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:56:54,265 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-24 22:56:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 22:56:54,266 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-24 22:56:54,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:56:54,274 INFO L225 Difference]: With dead ends: 41 [2020-09-24 22:56:54,275 INFO L226 Difference]: Without dead ends: 22 [2020-09-24 22:56:54,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 22:56:54,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-24 22:56:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-24 22:56:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 22:56:54,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-24 22:56:54,316 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2020-09-24 22:56:54,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:56:54,316 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-24 22:56:54,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 22:56:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-24 22:56:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-24 22:56:54,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:56:54,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:56:54,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:56:54,318 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:56:54,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:56:54,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1179723712, now seen corresponding path program 1 times [2020-09-24 22:56:54,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:56:54,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762668176] [2020-09-24 22:56:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:56:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:54,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:54,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:54,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:54,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:54,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 22:56:54,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:56:54,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-09-24 22:56:54,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:54,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 22:56:54,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 22:56:54,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 22:56:54,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 22:56:54,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:56:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:54,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:54,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:54,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:56:54,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:54,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:56:54,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:54,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:54,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:54,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:54,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:56:54,559 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 22:56:54,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762668176] [2020-09-24 22:56:54,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:56:54,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:56:54,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20753504] [2020-09-24 22:56:54,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:56:54,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:56:54,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:56:54,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:56:54,564 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2020-09-24 22:56:54,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:56:54,623 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-09-24 22:56:54,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 22:56:54,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-09-24 22:56:54,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:56:54,627 INFO L225 Difference]: With dead ends: 50 [2020-09-24 22:56:54,627 INFO L226 Difference]: Without dead ends: 34 [2020-09-24 22:56:54,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 22:56:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-24 22:56:54,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2020-09-24 22:56:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-24 22:56:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-24 22:56:54,636 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-09-24 22:56:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:56:54,637 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-24 22:56:54,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:56:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-24 22:56:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 22:56:54,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:56:54,638 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 22:56:54,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:56:54,639 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:56:54,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:56:54,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1535220285, now seen corresponding path program 1 times [2020-09-24 22:56:54,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:56:54,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319607717] [2020-09-24 22:56:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:56:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:54,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:54,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:54,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 22:56:54,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:54,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-24 22:56:54,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:54,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 22:56:54,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 22:56:54,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 22:56:54,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:56:54,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:56:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:54,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:54,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:54,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:56:54,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:54,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:56:54,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:54,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:54,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:54,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:54,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:54,835 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 22:56:54,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319607717] [2020-09-24 22:56:54,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:56:54,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 22:56:54,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143446717] [2020-09-24 22:56:54,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 22:56:54,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:56:54,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 22:56:54,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 22:56:54,838 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-09-24 22:56:54,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:56:54,905 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-09-24 22:56:54,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 22:56:54,906 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-09-24 22:56:54,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:56:54,907 INFO L225 Difference]: With dead ends: 38 [2020-09-24 22:56:54,907 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 22:56:54,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 22:56:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 22:56:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-24 22:56:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 22:56:54,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-24 22:56:54,915 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 17 [2020-09-24 22:56:54,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:56:54,915 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-24 22:56:54,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 22:56:54,916 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-24 22:56:54,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 22:56:54,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:56:54,917 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:56:54,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 22:56:54,917 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:56:54,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:56:54,918 INFO L82 PathProgramCache]: Analyzing trace with hash 463086038, now seen corresponding path program 1 times [2020-09-24 22:56:54,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:56:54,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983903007] [2020-09-24 22:56:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:56:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:54,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:54,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:55,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:55,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:55,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 22:56:55,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:56:55,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-09-24 22:56:55,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:55,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 22:56:55,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 22:56:55,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 22:56:55,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:55,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:56:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:55,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:55,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:55,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:56:55,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:55,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:56:55,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:55,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:55,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:55,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 22:56:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:56:55,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983903007] [2020-09-24 22:56:55,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:56:55,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 22:56:55,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57819601] [2020-09-24 22:56:55,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 22:56:55,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:56:55,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 22:56:55,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 22:56:55,242 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-24 22:56:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:56:55,327 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-09-24 22:56:55,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 22:56:55,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-24 22:56:55,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:56:55,330 INFO L225 Difference]: With dead ends: 59 [2020-09-24 22:56:55,330 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 22:56:55,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 22:56:55,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 22:56:55,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-09-24 22:56:55,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-24 22:56:55,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-24 22:56:55,337 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 24 [2020-09-24 22:56:55,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:56:55,338 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-24 22:56:55,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 22:56:55,338 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-24 22:56:55,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 22:56:55,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:56:55,339 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:56:55,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 22:56:55,340 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:56:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:56:55,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1265709657, now seen corresponding path program 1 times [2020-09-24 22:56:55,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:56:55,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067469797] [2020-09-24 22:56:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:56:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:55,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:55,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:55,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 22:56:55,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:55,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-24 22:56:55,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:55,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 22:56:55,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 22:56:55,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 22:56:55,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:55,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:56:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:55,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:55,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:55,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:56:55,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:55,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:56:55,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:55,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:55,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:55,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:55,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:56:55,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067469797] [2020-09-24 22:56:55,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:56:55,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 22:56:55,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367124719] [2020-09-24 22:56:55,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 22:56:55,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:56:55,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 22:56:55,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 22:56:55,493 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-24 22:56:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:56:55,552 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-24 22:56:55,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 22:56:55,553 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-09-24 22:56:55,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:56:55,554 INFO L225 Difference]: With dead ends: 46 [2020-09-24 22:56:55,554 INFO L226 Difference]: Without dead ends: 39 [2020-09-24 22:56:55,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 22:56:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-24 22:56:55,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-24 22:56:55,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 22:56:55,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-24 22:56:55,561 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2020-09-24 22:56:55,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:56:55,561 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-24 22:56:55,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 22:56:55,561 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-24 22:56:55,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 22:56:55,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:56:55,563 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:56:55,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 22:56:55,563 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:56:55,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:56:55,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1847206016, now seen corresponding path program 2 times [2020-09-24 22:56:55,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:56:55,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125538013] [2020-09-24 22:56:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:56:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:55,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:55,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:55,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:55,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:55,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:56,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:56,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 22:56:56,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 22:56:56,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-09-24 22:56:56,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:56,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 22:56:56,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 22:56:56,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 22:56:56,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:56,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:56:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:56,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:56,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:56,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:56:56,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:56,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:56:56,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:56,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:56,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:56,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:56,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:56:56,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125538013] [2020-09-24 22:56:56,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:56:56,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 22:56:56,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734096738] [2020-09-24 22:56:56,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 22:56:56,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:56:56,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 22:56:56,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-24 22:56:56,101 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 6 states. [2020-09-24 22:56:56,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:56:56,192 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-09-24 22:56:56,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 22:56:56,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-24 22:56:56,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:56:56,194 INFO L225 Difference]: With dead ends: 68 [2020-09-24 22:56:56,195 INFO L226 Difference]: Without dead ends: 52 [2020-09-24 22:56:56,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-24 22:56:56,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-24 22:56:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-09-24 22:56:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 22:56:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-24 22:56:56,202 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 33 [2020-09-24 22:56:56,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:56:56,203 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-24 22:56:56,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 22:56:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-24 22:56:56,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 22:56:56,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:56:56,205 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:56:56,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 22:56:56,205 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:56:56,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:56:56,206 INFO L82 PathProgramCache]: Analyzing trace with hash -34853245, now seen corresponding path program 2 times [2020-09-24 22:56:56,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:56:56,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319342379] [2020-09-24 22:56:56,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:56:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:56,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:56,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:56,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-24 22:56:56,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:56,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-09-24 22:56:56,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:56,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 22:56:56,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 22:56:56,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 22:56:56,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:56,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:56:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:56,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:56,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:56,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:56:56,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:56,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:56:56,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:56,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:56,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:56,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:56,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:56:56,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319342379] [2020-09-24 22:56:56,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:56:56,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 22:56:56,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649512834] [2020-09-24 22:56:56,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 22:56:56,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:56:56,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 22:56:56,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 22:56:56,466 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 8 states. [2020-09-24 22:56:56,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:56:56,579 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-09-24 22:56:56,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 22:56:56,580 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-09-24 22:56:56,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:56:56,581 INFO L225 Difference]: With dead ends: 55 [2020-09-24 22:56:56,581 INFO L226 Difference]: Without dead ends: 48 [2020-09-24 22:56:56,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-24 22:56:56,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-24 22:56:56,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-09-24 22:56:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-24 22:56:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-24 22:56:56,593 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 35 [2020-09-24 22:56:56,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:56:56,595 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-24 22:56:56,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 22:56:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-24 22:56:56,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 22:56:56,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:56:56,599 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:56:56,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 22:56:56,600 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:56:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:56:56,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1854078698, now seen corresponding path program 3 times [2020-09-24 22:56:56,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:56:56,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999265458] [2020-09-24 22:56:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:56:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:56,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:56,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:56,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:57,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:57,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:57,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:57,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:57,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:57,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-24 22:56:57,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 22:56:57,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 771 [2020-09-24 22:56:57,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:57,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 22:56:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 22:56:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 22:56:57,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:56:57,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:56:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:57,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:57,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:57,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:56:57,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:57,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:56:57,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:57,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:57,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:57,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:57,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:56:57,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999265458] [2020-09-24 22:56:57,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:56:57,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 22:56:57,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244411765] [2020-09-24 22:56:57,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 22:56:57,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:56:57,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 22:56:57,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-24 22:56:57,461 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 7 states. [2020-09-24 22:56:57,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:56:57,570 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-09-24 22:56:57,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 22:56:57,571 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-24 22:56:57,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:56:57,572 INFO L225 Difference]: With dead ends: 77 [2020-09-24 22:56:57,572 INFO L226 Difference]: Without dead ends: 61 [2020-09-24 22:56:57,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-09-24 22:56:57,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-24 22:56:57,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2020-09-24 22:56:57,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-24 22:56:57,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-09-24 22:56:57,598 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 42 [2020-09-24 22:56:57,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:56:57,598 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-09-24 22:56:57,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 22:56:57,599 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-09-24 22:56:57,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-24 22:56:57,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:56:57,600 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:56:57,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 22:56:57,601 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:56:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:56:57,601 INFO L82 PathProgramCache]: Analyzing trace with hash -736542311, now seen corresponding path program 3 times [2020-09-24 22:56:57,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:56:57,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884303448] [2020-09-24 22:56:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:56:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:57,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:57,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:57,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 22:56:57,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:57,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-09-24 22:56:57,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 22:56:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 22:56:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-24 22:56:57,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:57,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:56:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:57,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:57,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:57,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:56:57,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:57,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:56:57,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:57,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:57,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:57,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:57,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:56:57,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884303448] [2020-09-24 22:56:57,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:56:57,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 22:56:57,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243395070] [2020-09-24 22:56:57,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 22:56:57,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:56:57,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 22:56:57,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-24 22:56:57,887 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 11 states. [2020-09-24 22:56:58,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:56:58,038 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-09-24 22:56:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 22:56:58,039 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-09-24 22:56:58,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:56:58,040 INFO L225 Difference]: With dead ends: 64 [2020-09-24 22:56:58,040 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 22:56:58,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-24 22:56:58,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 22:56:58,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-09-24 22:56:58,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-24 22:56:58,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-24 22:56:58,046 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 44 [2020-09-24 22:56:58,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:56:58,047 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-24 22:56:58,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 22:56:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-24 22:56:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 22:56:58,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:56:58,048 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:56:58,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 22:56:58,049 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:56:58,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:56:58,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2107741888, now seen corresponding path program 4 times [2020-09-24 22:56:58,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:56:58,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436373013] [2020-09-24 22:56:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:56:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:58,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:58,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:58,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:58,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:58,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:59,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:59,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:59,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:59,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:59,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:59,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 22:56:59,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 22:56:59,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1500 [2020-09-24 22:56:59,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:59,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 22:56:59,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 22:56:59,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 22:56:59,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:59,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:56:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:59,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:59,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:59,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:56:59,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:59,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:56:59,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:59,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:59,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:59,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:59,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:56:59,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436373013] [2020-09-24 22:56:59,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:56:59,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 22:56:59,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502044840] [2020-09-24 22:56:59,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 22:56:59,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:56:59,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 22:56:59,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-24 22:56:59,632 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 8 states. [2020-09-24 22:56:59,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:56:59,751 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-09-24 22:56:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 22:56:59,752 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-09-24 22:56:59,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:56:59,753 INFO L225 Difference]: With dead ends: 86 [2020-09-24 22:56:59,753 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 22:56:59,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-09-24 22:56:59,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 22:56:59,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-09-24 22:56:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 22:56:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-24 22:56:59,760 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 51 [2020-09-24 22:56:59,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:56:59,760 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-24 22:56:59,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 22:56:59,760 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-24 22:56:59,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 22:56:59,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:56:59,762 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:56:59,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 22:56:59,762 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:56:59,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:56:59,762 INFO L82 PathProgramCache]: Analyzing trace with hash 306267971, now seen corresponding path program 4 times [2020-09-24 22:56:59,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:56:59,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063735882] [2020-09-24 22:56:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:56:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:59,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:00,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:00,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 22:57:00,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:00,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-09-24 22:57:00,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:00,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 22:57:00,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 22:57:00,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 22:57:00,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:57:00,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:57:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:00,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:00,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:00,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:57:00,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:00,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:57:00,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:00,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:57:00,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:57:00,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:57:00,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:57:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:57:00,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063735882] [2020-09-24 22:57:00,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:57:00,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 22:57:00,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074002423] [2020-09-24 22:57:00,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 22:57:00,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:57:00,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 22:57:00,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-24 22:57:00,210 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 12 states. [2020-09-24 22:57:00,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:57:00,369 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-09-24 22:57:00,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 22:57:00,370 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-09-24 22:57:00,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:57:00,371 INFO L225 Difference]: With dead ends: 73 [2020-09-24 22:57:00,371 INFO L226 Difference]: Without dead ends: 66 [2020-09-24 22:57:00,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-24 22:57:00,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-24 22:57:00,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-09-24 22:57:00,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-24 22:57:00,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-09-24 22:57:00,381 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 53 [2020-09-24 22:57:00,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:57:00,381 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-09-24 22:57:00,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 22:57:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-09-24 22:57:00,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 22:57:00,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:57:00,388 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:57:00,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 22:57:00,389 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:57:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:57:00,389 INFO L82 PathProgramCache]: Analyzing trace with hash -392261546, now seen corresponding path program 5 times [2020-09-24 22:57:00,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:57:00,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091460009] [2020-09-24 22:57:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:57:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:00,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:00,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:00,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:01,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:01,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:01,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:01,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:02,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:02,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:02,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:02,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:02,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:02,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 22:57:02,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 22:57:02,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2068 [2020-09-24 22:57:02,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:02,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 22:57:02,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 22:57:02,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 22:57:02,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:57:02,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:57:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:02,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:02,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:02,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:57:02,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:02,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:57:02,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:02,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:57:02,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:57:02,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:57:02,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:57:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:57:02,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091460009] [2020-09-24 22:57:02,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:57:02,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 22:57:02,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145073332] [2020-09-24 22:57:02,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 22:57:02,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:57:02,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 22:57:02,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-24 22:57:02,575 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 9 states. [2020-09-24 22:57:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:57:02,701 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-09-24 22:57:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 22:57:02,701 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-09-24 22:57:02,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:57:02,702 INFO L225 Difference]: With dead ends: 95 [2020-09-24 22:57:02,702 INFO L226 Difference]: Without dead ends: 79 [2020-09-24 22:57:02,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-09-24 22:57:02,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-24 22:57:02,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-09-24 22:57:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-24 22:57:02,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-09-24 22:57:02,716 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2020-09-24 22:57:02,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:57:02,716 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-09-24 22:57:02,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 22:57:02,716 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-09-24 22:57:02,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 22:57:02,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:57:02,718 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:57:02,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 22:57:02,718 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:57:02,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:57:02,722 INFO L82 PathProgramCache]: Analyzing trace with hash -384565031, now seen corresponding path program 5 times [2020-09-24 22:57:02,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:57:02,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615452250] [2020-09-24 22:57:02,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:57:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:02,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:03,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:03,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-24 22:57:03,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:03,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-09-24 22:57:03,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:03,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 22:57:03,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 22:57:03,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-09-24 22:57:03,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:57:03,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:57:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:03,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:03,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:03,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:57:03,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:03,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:57:03,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:03,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:57:03,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:57:03,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:57:03,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:57:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:57:03,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615452250] [2020-09-24 22:57:03,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:57:03,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 22:57:03,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172655517] [2020-09-24 22:57:03,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 22:57:03,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:57:03,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 22:57:03,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-09-24 22:57:03,216 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 15 states. [2020-09-24 22:57:03,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:57:03,460 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-09-24 22:57:03,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 22:57:03,460 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-09-24 22:57:03,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:57:03,461 INFO L225 Difference]: With dead ends: 82 [2020-09-24 22:57:03,462 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 22:57:03,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-09-24 22:57:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 22:57:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-24 22:57:03,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 22:57:03,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-09-24 22:57:03,476 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 62 [2020-09-24 22:57:03,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:57:03,476 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-09-24 22:57:03,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 22:57:03,477 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-09-24 22:57:03,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 22:57:03,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:57:03,478 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:57:03,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 22:57:03,479 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:57:03,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:57:03,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1192623616, now seen corresponding path program 6 times [2020-09-24 22:57:03,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:57:03,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481339229] [2020-09-24 22:57:03,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:57:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:03,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:03,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:03,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:04,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:04,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:04,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:05,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:05,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:05,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:05,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:06,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:06,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:06,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:06,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:06,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 22:57:06,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 22:57:06,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3076 [2020-09-24 22:57:06,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:06,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 22:57:06,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 22:57:06,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-24 22:57:06,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:57:06,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:57:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:06,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:06,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:06,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:57:06,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:06,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:57:06,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:06,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:57:06,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:57:06,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:57:06,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:57:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:57:06,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481339229] [2020-09-24 22:57:06,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:57:06,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 22:57:06,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162743549] [2020-09-24 22:57:06,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 22:57:06,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:57:06,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 22:57:06,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-24 22:57:06,655 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 10 states. [2020-09-24 22:57:06,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:57:06,806 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-09-24 22:57:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 22:57:06,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-24 22:57:06,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:57:06,808 INFO L225 Difference]: With dead ends: 104 [2020-09-24 22:57:06,808 INFO L226 Difference]: Without dead ends: 88 [2020-09-24 22:57:06,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-09-24 22:57:06,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-24 22:57:06,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-09-24 22:57:06,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-24 22:57:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-09-24 22:57:06,818 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 69 [2020-09-24 22:57:06,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:57:06,818 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-09-24 22:57:06,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 22:57:06,818 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-09-24 22:57:06,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 22:57:06,822 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:57:06,822 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:57:06,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 22:57:06,823 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:57:06,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:57:06,823 INFO L82 PathProgramCache]: Analyzing trace with hash -733368317, now seen corresponding path program 6 times [2020-09-24 22:57:06,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:57:06,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919209043] [2020-09-24 22:57:06,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:57:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:06,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:07,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:07,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 22:57:07,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:07,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-09-24 22:57:07,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:07,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 22:57:07,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 22:57:07,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-24 22:57:07,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:57:07,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:57:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:07,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:07,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:07,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:57:07,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:07,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:57:07,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:07,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:57:07,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:57:07,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:57:07,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:57:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:57:07,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919209043] [2020-09-24 22:57:07,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:57:07,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 22:57:07,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348228593] [2020-09-24 22:57:07,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 22:57:07,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:57:07,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 22:57:07,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-09-24 22:57:07,375 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2020-09-24 22:57:07,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:57:07,658 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-09-24 22:57:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 22:57:07,658 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-09-24 22:57:07,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:57:07,659 INFO L225 Difference]: With dead ends: 91 [2020-09-24 22:57:07,659 INFO L226 Difference]: Without dead ends: 84 [2020-09-24 22:57:07,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-09-24 22:57:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-24 22:57:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-09-24 22:57:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 22:57:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-09-24 22:57:07,668 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 71 [2020-09-24 22:57:07,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:57:07,668 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-09-24 22:57:07,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 22:57:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-09-24 22:57:07,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 22:57:07,673 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:57:07,673 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:57:07,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 22:57:07,673 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:57:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:57:07,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1330458730, now seen corresponding path program 7 times [2020-09-24 22:57:07,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:57:07,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496653493] [2020-09-24 22:57:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:57:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:07,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:07,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:08,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:08,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:08,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:08,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:09,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:09,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:10,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:10,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:10,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:11,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:11,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:11,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:11,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:11,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:11,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 22:57:11,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-24 22:57:11,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4086 [2020-09-24 22:57:11,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:11,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 22:57:11,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 22:57:11,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-24 22:57:11,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:57:11,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:57:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:11,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:11,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:11,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:57:11,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:11,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:57:11,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:11,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:57:11,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:57:11,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:57:11,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 22:57:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:57:11,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496653493] [2020-09-24 22:57:11,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:57:11,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 22:57:11,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311013840] [2020-09-24 22:57:11,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 22:57:11,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:57:11,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 22:57:11,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-24 22:57:11,896 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 11 states. [2020-09-24 22:57:12,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:57:12,035 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-09-24 22:57:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 22:57:12,036 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2020-09-24 22:57:12,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:57:12,037 INFO L225 Difference]: With dead ends: 113 [2020-09-24 22:57:12,037 INFO L226 Difference]: Without dead ends: 97 [2020-09-24 22:57:12,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-09-24 22:57:12,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-24 22:57:12,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-09-24 22:57:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-24 22:57:12,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-09-24 22:57:12,048 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 78 [2020-09-24 22:57:12,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:57:12,048 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-09-24 22:57:12,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 22:57:12,048 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-09-24 22:57:12,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-24 22:57:12,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:57:12,049 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:57:12,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 22:57:12,053 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:57:12,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:57:12,053 INFO L82 PathProgramCache]: Analyzing trace with hash -48926695, now seen corresponding path program 7 times [2020-09-24 22:57:12,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:57:12,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770114492] [2020-09-24 22:57:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:57:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:12,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:12,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:12,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-24 22:57:12,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:12,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-09-24 22:57:12,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:12,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 22:57:12,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 22:57:12,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-24 22:57:12,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:57:12,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:57:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:12,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:12,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:12,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:57:12,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:12,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:57:12,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:12,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:57:12,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:57:12,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:57:12,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:57:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 27 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:57:12,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770114492] [2020-09-24 22:57:12,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:57:12,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 22:57:12,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124507271] [2020-09-24 22:57:12,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 22:57:12,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:57:12,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 22:57:12,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-09-24 22:57:12,831 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 18 states. [2020-09-24 22:57:13,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:57:13,090 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2020-09-24 22:57:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 22:57:13,090 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-09-24 22:57:13,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:57:13,091 INFO L225 Difference]: With dead ends: 87 [2020-09-24 22:57:13,091 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 22:57:13,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2020-09-24 22:57:13,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 22:57:13,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 22:57:13,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 22:57:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 22:57:13,096 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2020-09-24 22:57:13,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:57:13,097 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 22:57:13,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 22:57:13,097 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 22:57:13,097 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 22:57:13,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 22:57:13,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 22:57:13,300 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 22:57:13,300 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 22:57:13,300 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 22:57:13,300 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 22:57:13,300 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 22:57:13,301 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 22:57:13,301 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-24 22:57:13,301 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-24 22:57:13,301 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-24 22:57:13,301 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-24 22:57:13,301 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-24 22:57:13,301 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 22) no Hoare annotation was computed. [2020-09-24 22:57:13,301 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-24 22:57:13,301 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-24 22:57:13,302 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 22) no Hoare annotation was computed. [2020-09-24 22:57:13,302 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 22) the Hoare annotation is: true [2020-09-24 22:57:13,302 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-24 22:57:13,302 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-24 22:57:13,302 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-24 22:57:13,302 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-24 22:57:13,302 INFO L268 CegarLoopResult]: For program point L16-3(line 16) no Hoare annotation was computed. [2020-09-24 22:57:13,302 INFO L268 CegarLoopResult]: For program point L16-5(lines 16 19) no Hoare annotation was computed. [2020-09-24 22:57:13,303 INFO L268 CegarLoopResult]: For program point L16-6(line 16) no Hoare annotation was computed. [2020-09-24 22:57:13,303 INFO L268 CegarLoopResult]: For program point L16-7(line 16) no Hoare annotation was computed. [2020-09-24 22:57:13,303 INFO L268 CegarLoopResult]: For program point L16-9(line 16) no Hoare annotation was computed. [2020-09-24 22:57:13,303 INFO L268 CegarLoopResult]: For program point L16-10(line 16) no Hoare annotation was computed. [2020-09-24 22:57:13,303 INFO L264 CegarLoopResult]: At program point L16-11(lines 16 19) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 2))) (or (and (< 0 (+ main_~y~0 1)) (<= (* 3 main_~y~0) .cse0) (<= 1 (+ main_~x~0 main_~y~0))) (and (<= (* 2 main_~y~0) .cse0) (<= 2 main_~y~0)))) [2020-09-24 22:57:13,303 INFO L264 CegarLoopResult]: At program point L16-12(lines 16 19) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2020-09-24 22:57:13,304 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-24 22:57:13,304 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-24 22:57:13,304 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-24 22:57:13,304 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-24 22:57:13,304 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-24 22:57:13,304 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-24 22:57:13,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 10:57:13 BoogieIcfgContainer [2020-09-24 22:57:13,330 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 22:57:13,339 INFO L168 Benchmark]: Toolchain (without parser) took 20347.93 ms. Allocated memory was 141.0 MB in the beginning and 356.5 MB in the end (delta: 215.5 MB). Free memory was 105.0 MB in the beginning and 288.9 MB in the end (delta: -184.0 MB). Peak memory consumption was 31.5 MB. Max. memory is 7.1 GB. [2020-09-24 22:57:13,341 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 22:57:13,342 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.24 ms. Allocated memory is still 141.0 MB. Free memory was 104.3 MB in the beginning and 95.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 22:57:13,347 INFO L168 Benchmark]: Boogie Preprocessor took 151.05 ms. Allocated memory was 141.0 MB in the beginning and 206.0 MB in the end (delta: 65.0 MB). Free memory was 95.0 MB in the beginning and 185.3 MB in the end (delta: -90.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-24 22:57:13,347 INFO L168 Benchmark]: RCFGBuilder took 372.73 ms. Allocated memory is still 206.0 MB. Free memory was 184.6 MB in the beginning and 172.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-24 22:57:13,349 INFO L168 Benchmark]: TraceAbstraction took 19492.70 ms. Allocated memory was 206.0 MB in the beginning and 356.5 MB in the end (delta: 150.5 MB). Free memory was 171.5 MB in the beginning and 288.9 MB in the end (delta: -117.4 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. [2020-09-24 22:57:13,355 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 322.24 ms. Allocated memory is still 141.0 MB. Free memory was 104.3 MB in the beginning and 95.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 151.05 ms. Allocated memory was 141.0 MB in the beginning and 206.0 MB in the end (delta: 65.0 MB). Free memory was 95.0 MB in the beginning and 185.3 MB in the end (delta: -90.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 372.73 ms. Allocated memory is still 206.0 MB. Free memory was 184.6 MB in the beginning and 172.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19492.70 ms. Allocated memory was 206.0 MB in the beginning and 356.5 MB in the end (delta: 150.5 MB). Free memory was 171.5 MB in the beginning and 288.9 MB in the end (delta: -117.4 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: ((0 < y + 1 && 3 * y <= x + 2) && 1 <= x + y) || (2 * y <= x + 2 && 2 <= y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19.1s, OverallIterations: 17, TraceHistogramMax: 8, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 452 SDtfs, 786 SDslu, 2419 SDs, 0 SdLazy, 973 SolverSat, 141 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 272 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 102 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 23 PreInvPairs, 38 NumberOfFragments, 38 HoareAnnotationTreeSize, 23 FomulaSimplifications, 165 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 144 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 16.1s InterpolantComputationTime, 771 NumberOfCodeBlocks, 771 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 754 ConstructedInterpolants, 0 QuantifiedInterpolants, 161964 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 27/1232 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...