/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:20:53,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:20:53,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:20:53,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:20:53,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:20:53,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:20:53,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:20:53,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:20:53,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:20:53,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:20:53,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:20:53,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:20:53,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:20:53,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:20:53,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:20:53,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:20:53,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:20:53,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:20:53,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:20:53,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:20:53,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:20:53,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:20:53,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:20:53,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:20:53,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:20:53,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:20:53,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:20:53,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:20:53,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:20:53,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:20:53,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:20:53,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:20:53,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:20:53,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:20:53,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:20:53,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:20:53,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:20:53,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:20:53,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:20:53,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:20:53,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:20:53,481 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 17:20:53,545 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:20:53,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:20:53,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:20:53,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:20:53,547 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:20:53,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:20:53,548 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:20:53,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:20:53,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:20:53,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:20:53,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:20:53,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:20:53,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:20:53,550 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:20:53,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:20:53,550 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:20:53,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:20:53,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:20:53,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:20:53,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:20:53,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:20:53,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:20:53,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:20:53,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:20:53,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:20:53,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:20:53,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:20:53,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:20:53,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:20:53,554 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;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;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;log-additional-information=true; [2020-09-24 17:20:54,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:20:54,085 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:20:54,092 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:20:54,093 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:20:54,094 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:20:54,096 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-24 17:20:54,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76f2fcf6b/40178b7eed9c446eb30bd6d8a05ef0bd/FLAG09811273d [2020-09-24 17:20:54,740 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:20:54,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-24 17:20:54,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76f2fcf6b/40178b7eed9c446eb30bd6d8a05ef0bd/FLAG09811273d [2020-09-24 17:20:55,089 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76f2fcf6b/40178b7eed9c446eb30bd6d8a05ef0bd [2020-09-24 17:20:55,103 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:20:55,112 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:20:55,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:20:55,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:20:55,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:20:55,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:20:55" (1/1) ... [2020-09-24 17:20:55,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dbfc66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:55, skipping insertion in model container [2020-09-24 17:20:55,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:20:55" (1/1) ... [2020-09-24 17:20:55,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:20:55,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:20:55,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:20:55,381 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:20:55,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:20:55,428 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:20:55,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:55 WrapperNode [2020-09-24 17:20:55,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:20:55,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:20:55,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:20:55,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:20:55,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:55" (1/1) ... [2020-09-24 17:20:55,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:55" (1/1) ... [2020-09-24 17:20:55,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:55" (1/1) ... [2020-09-24 17:20:55,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:55" (1/1) ... [2020-09-24 17:20:55,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:55" (1/1) ... [2020-09-24 17:20:55,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:55" (1/1) ... [2020-09-24 17:20:55,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:55" (1/1) ... [2020-09-24 17:20:55,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:20:55,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:20:55,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:20:55,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:20:55,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:55" (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 17:20:55,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:20:55,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:20:55,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 17:20:55,644 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:20:55,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:20:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:20:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 17:20:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:20:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 17:20:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 17:20:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 17:20:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 17:20:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:20:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:20:55,914 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:20:55,915 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 17:20:55,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:20:55 BoogieIcfgContainer [2020-09-24 17:20:55,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:20:55,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:20:55,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:20:55,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:20:55,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:20:55" (1/3) ... [2020-09-24 17:20:55,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@176c787a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:20:55, skipping insertion in model container [2020-09-24 17:20:55,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:55" (2/3) ... [2020-09-24 17:20:55,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@176c787a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:20:55, skipping insertion in model container [2020-09-24 17:20:55,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:20:55" (3/3) ... [2020-09-24 17:20:55,948 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-09-24 17:20:55,961 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:20:55,971 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:20:55,993 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:20:56,023 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:20:56,023 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:20:56,023 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:20:56,023 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:20:56,023 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:20:56,024 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:20:56,024 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:20:56,024 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:20:56,046 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-09-24 17:20:56,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 17:20:56,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:56,055 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 17:20:56,056 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:56,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:56,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2145994368, now seen corresponding path program 1 times [2020-09-24 17:20:56,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:56,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848608558] [2020-09-24 17:20:56,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:56,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:56,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:56,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:56,458 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:56,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 17:20:56,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:20:56,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-09-24 17:20:56,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:56,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:20:56,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 17:20:56,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:20:56,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 17:20:56,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:56,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:56,599 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:56,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:20:56,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:56,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 17:20:56,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:56,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:56,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:56,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:56,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:56,612 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 17:20:56,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848608558] [2020-09-24 17:20:56,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:20:56,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 17:20:56,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471024719] [2020-09-24 17:20:56,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:20:56,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:56,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:20:56,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:20:56,647 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 6 states. [2020-09-24 17:20:56,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:56,904 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2020-09-24 17:20:56,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:20:56,907 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-09-24 17:20:56,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:56,918 INFO L225 Difference]: With dead ends: 83 [2020-09-24 17:20:56,918 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 17:20:56,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:20:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 17:20:56,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-09-24 17:20:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 17:20:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-24 17:20:56,979 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 17 [2020-09-24 17:20:56,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:56,980 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-24 17:20:56,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:20:56,980 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-24 17:20:56,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 17:20:56,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:56,982 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:56,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:20:56,983 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:56,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:56,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1756759471, now seen corresponding path program 1 times [2020-09-24 17:20:56,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:56,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270908173] [2020-09-24 17:20:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:57,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:57,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:57,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:57,606 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:57,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 17:20:57,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:20:57,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-09-24 17:20:57,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:57,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:20:57,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:20:57,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:20:57,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:57,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:57,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:57,689 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:57,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:20:57,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:57,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:20:57,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:57,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:57,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:57,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:57,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 17:20:57,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270908173] [2020-09-24 17:20:57,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:57,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 17:20:57,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437043427] [2020-09-24 17:20:57,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:20:57,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:57,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:20:57,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:20:57,701 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 6 states. [2020-09-24 17:20:57,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:57,818 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-09-24 17:20:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:20:57,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-24 17:20:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:57,820 INFO L225 Difference]: With dead ends: 68 [2020-09-24 17:20:57,820 INFO L226 Difference]: Without dead ends: 50 [2020-09-24 17:20:57,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:20:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-24 17:20:57,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-09-24 17:20:57,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-24 17:20:57,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-09-24 17:20:57,830 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 33 [2020-09-24 17:20:57,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:57,830 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-09-24 17:20:57,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:20:57,831 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-09-24 17:20:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 17:20:57,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:57,832 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:57,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:20:57,833 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:57,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1548421952, now seen corresponding path program 2 times [2020-09-24 17:20:57,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:57,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461286312] [2020-09-24 17:20:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:57,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:57,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:58,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:58,571 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:58,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 17:20:58,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:20:58,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-09-24 17:20:58,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:20:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:20:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 17:20:58,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:58,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:58,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:58,669 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:58,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:20:58,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:58,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:20:58,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:58,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:58,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:58,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:58,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 17:20:58,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461286312] [2020-09-24 17:20:58,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:58,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 17:20:58,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695595245] [2020-09-24 17:20:58,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:20:58,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:58,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:20:58,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:20:58,685 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 8 states. [2020-09-24 17:20:58,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:58,864 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-09-24 17:20:58,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 17:20:58,864 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-09-24 17:20:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:58,866 INFO L225 Difference]: With dead ends: 75 [2020-09-24 17:20:58,866 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 17:20:58,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:20:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 17:20:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2020-09-24 17:20:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 17:20:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-09-24 17:20:58,875 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 40 [2020-09-24 17:20:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:58,876 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-09-24 17:20:58,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:20:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-09-24 17:20:58,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 17:20:58,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:58,878 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:58,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:20:58,879 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:58,879 INFO L82 PathProgramCache]: Analyzing trace with hash -842063729, now seen corresponding path program 3 times [2020-09-24 17:20:58,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:58,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705344416] [2020-09-24 17:20:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:58,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:58,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:59,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:00,227 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:00,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-24 17:21:00,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:21:00,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1332 [2020-09-24 17:21:00,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:00,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:21:00,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:21:00,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 17:21:00,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:21:00,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:21:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:00,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:00,309 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:00,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:21:00,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:00,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:21:00,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:00,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:21:00,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:00,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:21:00,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:21:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 17:21:00,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705344416] [2020-09-24 17:21:00,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:21:00,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 17:21:00,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450626769] [2020-09-24 17:21:00,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 17:21:00,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:21:00,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 17:21:00,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:21:00,320 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 10 states. [2020-09-24 17:21:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:21:00,503 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2020-09-24 17:21:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 17:21:00,504 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-09-24 17:21:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:21:00,505 INFO L225 Difference]: With dead ends: 82 [2020-09-24 17:21:00,505 INFO L226 Difference]: Without dead ends: 64 [2020-09-24 17:21:00,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:21:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-24 17:21:00,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-09-24 17:21:00,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 17:21:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-09-24 17:21:00,514 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 47 [2020-09-24 17:21:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:21:00,514 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-09-24 17:21:00,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 17:21:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-09-24 17:21:00,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-24 17:21:00,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:21:00,516 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:21:00,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:21:00,516 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:21:00,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:21:00,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1005462048, now seen corresponding path program 4 times [2020-09-24 17:21:00,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:21:00,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977787300] [2020-09-24 17:21:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:21:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:00,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:00,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:00,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:02,439 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:02,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 17:21:02,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:21:02,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1907 [2020-09-24 17:21:02,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:02,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:21:02,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 17:21:02,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 17:21:02,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:21:02,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:21:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:02,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:02,526 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:02,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:21:02,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:02,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:21:02,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:02,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:21:02,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:02,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:21:02,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:21:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-24 17:21:02,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977787300] [2020-09-24 17:21:02,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:21:02,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 17:21:02,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894412971] [2020-09-24 17:21:02,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:21:02,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:21:02,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:21:02,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:21:02,539 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 8 states. [2020-09-24 17:21:02,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:21:02,699 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-09-24 17:21:02,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 17:21:02,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-09-24 17:21:02,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:21:02,701 INFO L225 Difference]: With dead ends: 70 [2020-09-24 17:21:02,701 INFO L226 Difference]: Without dead ends: 64 [2020-09-24 17:21:02,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:21:02,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-24 17:21:02,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-09-24 17:21:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 17:21:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-24 17:21:02,709 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 54 [2020-09-24 17:21:02,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:21:02,710 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-24 17:21:02,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:21:02,710 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-24 17:21:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 17:21:02,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:21:02,712 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:21:02,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:21:02,712 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:21:02,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:21:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1143766212, now seen corresponding path program 5 times [2020-09-24 17:21:02,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:21:02,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727910886] [2020-09-24 17:21:02,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:21:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:02,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:02,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:03,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:03,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:05,115 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:05,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 17:21:05,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:21:05,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2388 [2020-09-24 17:21:05,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:05,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 17:21:05,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:21:05,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 17:21:05,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:21:05,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:21:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:05,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:05,243 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:05,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:21:05,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:05,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:21:05,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:05,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:21:05,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:05,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:21:05,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:21:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 17:21:05,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727910886] [2020-09-24 17:21:05,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:21:05,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 17:21:05,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079508157] [2020-09-24 17:21:05,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 17:21:05,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:21:05,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 17:21:05,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:21:05,260 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 12 states. [2020-09-24 17:21:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:21:05,513 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2020-09-24 17:21:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 17:21:05,514 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-09-24 17:21:05,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:21:05,515 INFO L225 Difference]: With dead ends: 101 [2020-09-24 17:21:05,515 INFO L226 Difference]: Without dead ends: 76 [2020-09-24 17:21:05,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 17:21:05,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-24 17:21:05,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2020-09-24 17:21:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-24 17:21:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-09-24 17:21:05,524 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 61 [2020-09-24 17:21:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:21:05,525 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-09-24 17:21:05,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 17:21:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-09-24 17:21:05,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-24 17:21:05,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:21:05,526 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:21:05,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:21:05,527 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:21:05,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:21:05,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1966270379, now seen corresponding path program 6 times [2020-09-24 17:21:05,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:21:05,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009844900] [2020-09-24 17:21:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:21:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:05,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:05,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:05,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:05,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:08,228 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:08,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-24 17:21:08,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:21:08,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2684 [2020-09-24 17:21:08,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:08,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 17:21:08,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:21:08,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 17:21:08,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:21:08,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:21:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:08,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:08,386 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:08,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:21:08,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:08,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:21:08,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:08,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:21:08,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:08,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:21:08,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:21:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 17:21:08,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009844900] [2020-09-24 17:21:08,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:21:08,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 17:21:08,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497803741] [2020-09-24 17:21:08,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 17:21:08,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:21:08,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 17:21:08,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-24 17:21:08,401 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 14 states. [2020-09-24 17:21:08,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:21:08,682 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-09-24 17:21:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 17:21:08,683 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-09-24 17:21:08,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:21:08,684 INFO L225 Difference]: With dead ends: 108 [2020-09-24 17:21:08,684 INFO L226 Difference]: Without dead ends: 83 [2020-09-24 17:21:08,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-24 17:21:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-24 17:21:08,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-09-24 17:21:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-24 17:21:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-09-24 17:21:08,702 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2020-09-24 17:21:08,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:21:08,702 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-09-24 17:21:08,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 17:21:08,702 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-09-24 17:21:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-24 17:21:08,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:21:08,704 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:21:08,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 17:21:08,704 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:21:08,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:21:08,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1126004828, now seen corresponding path program 7 times [2020-09-24 17:21:08,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:21:08,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783291414] [2020-09-24 17:21:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:21:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:08,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:08,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:09,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:09,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:11,578 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:11,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 17:21:11,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:21:11,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2858 [2020-09-24 17:21:11,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:11,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 17:21:11,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:21:11,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 17:21:11,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:21:11,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:21:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:11,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:11,821 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:11,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:21:11,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:11,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:21:11,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:11,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:21:11,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:11,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:21:11,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:21:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 17:21:11,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783291414] [2020-09-24 17:21:11,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:21:11,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 17:21:11,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500588594] [2020-09-24 17:21:11,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 17:21:11,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:21:11,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 17:21:11,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:21:11,834 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 16 states. [2020-09-24 17:21:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:21:12,307 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2020-09-24 17:21:12,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 17:21:12,308 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-09-24 17:21:12,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:21:12,311 INFO L225 Difference]: With dead ends: 115 [2020-09-24 17:21:12,311 INFO L226 Difference]: Without dead ends: 90 [2020-09-24 17:21:12,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-24 17:21:12,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-24 17:21:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-09-24 17:21:12,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 17:21:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-09-24 17:21:12,330 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 75 [2020-09-24 17:21:12,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:21:12,330 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-09-24 17:21:12,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 17:21:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-09-24 17:21:12,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-24 17:21:12,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:21:12,332 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:21:12,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 17:21:12,336 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:21:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:21:12,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1440804491, now seen corresponding path program 8 times [2020-09-24 17:21:12,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:21:12,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910215015] [2020-09-24 17:21:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:21:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:12,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:12,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:12,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:13,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:15,962 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:15,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-24 17:21:15,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:21:15,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3609 [2020-09-24 17:21:15,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:15,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:21:15,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-09-24 17:21:15,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 17:21:15,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 17:21:16,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:21:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:16,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:16,072 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:16,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:21:16,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:16,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:21:16,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:16,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:21:16,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:16,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:21:16,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:21:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-09-24 17:21:16,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910215015] [2020-09-24 17:21:16,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:21:16,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 17:21:16,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368784821] [2020-09-24 17:21:16,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:21:16,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:21:16,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:21:16,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:21:16,088 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 8 states. [2020-09-24 17:21:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:21:16,205 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-09-24 17:21:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 17:21:16,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2020-09-24 17:21:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:21:16,206 INFO L225 Difference]: With dead ends: 85 [2020-09-24 17:21:16,206 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 17:21:16,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:21:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 17:21:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 17:21:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 17:21:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 17:21:16,208 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 82 [2020-09-24 17:21:16,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:21:16,208 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 17:21:16,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:21:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 17:21:16,210 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 17:21:16,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 17:21:16,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 17:21:16,310 INFO L268 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-09-24 17:21:16,310 INFO L268 CegarLoopResult]: For program point L-1-1(line -1) no Hoare annotation was computed. [2020-09-24 17:21:16,310 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-24 17:21:16,310 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-24 17:21:16,311 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 17:21:16,311 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 17:21:16,311 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 17:21:16,311 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 17:21:16,311 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 17:21:16,311 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 23) no Hoare annotation was computed. [2020-09-24 17:21:16,311 INFO L268 CegarLoopResult]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2020-09-24 17:21:16,312 INFO L268 CegarLoopResult]: For program point L17-2(line 17) no Hoare annotation was computed. [2020-09-24 17:21:16,312 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-09-24 17:21:16,312 INFO L268 CegarLoopResult]: For program point L17-4(line 17) no Hoare annotation was computed. [2020-09-24 17:21:16,312 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 23) no Hoare annotation was computed. [2020-09-24 17:21:16,312 INFO L268 CegarLoopResult]: For program point L17-5(lines 17 21) no Hoare annotation was computed. [2020-09-24 17:21:16,312 INFO L268 CegarLoopResult]: For program point L17-6(line 17) no Hoare annotation was computed. [2020-09-24 17:21:16,312 INFO L268 CegarLoopResult]: For program point L13-3(lines 13 15) no Hoare annotation was computed. [2020-09-24 17:21:16,312 INFO L268 CegarLoopResult]: For program point L17-7(line 17) no Hoare annotation was computed. [2020-09-24 17:21:16,313 INFO L268 CegarLoopResult]: For program point L13-4(line 13) no Hoare annotation was computed. [2020-09-24 17:21:16,313 INFO L264 CegarLoopResult]: At program point L17-8(lines 17 21) the Hoare annotation is: (<= main_~i~0 1024) [2020-09-24 17:21:16,313 INFO L268 CegarLoopResult]: For program point L13-5(line 13) no Hoare annotation was computed. [2020-09-24 17:21:16,313 INFO L264 CegarLoopResult]: At program point L17-9(lines 17 21) the Hoare annotation is: (<= main_~i~0 1024) [2020-09-24 17:21:16,313 INFO L271 CegarLoopResult]: At program point L13-6(lines 13 15) the Hoare annotation is: true [2020-09-24 17:21:16,313 INFO L268 CegarLoopResult]: For program point L13-7(lines 13 15) no Hoare annotation was computed. [2020-09-24 17:21:16,313 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 9 23) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-24 17:21:16,314 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-24 17:21:16,314 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-09-24 17:21:16,314 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-24 17:21:16,314 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-09-24 17:21:16,314 INFO L268 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-09-24 17:21:16,314 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-09-24 17:21:16,314 INFO L268 CegarLoopResult]: For program point L10-1(line 10) no Hoare annotation was computed. [2020-09-24 17:21:16,315 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-24 17:21:16,315 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-24 17:21:16,315 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-24 17:21:16,315 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-24 17:21:16,315 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-24 17:21:16,315 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-24 17:21:16,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 05:21:16 BoogieIcfgContainer [2020-09-24 17:21:16,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 17:21:16,342 INFO L168 Benchmark]: Toolchain (without parser) took 21235.98 ms. Allocated memory was 140.0 MB in the beginning and 375.9 MB in the end (delta: 235.9 MB). Free memory was 102.4 MB in the beginning and 132.5 MB in the end (delta: -30.2 MB). Peak memory consumption was 205.8 MB. Max. memory is 7.1 GB. [2020-09-24 17:21:16,343 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 17:21:16,344 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.80 ms. Allocated memory is still 140.0 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-24 17:21:16,345 INFO L168 Benchmark]: Boogie Preprocessor took 141.20 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 91.9 MB in the beginning and 180.4 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-24 17:21:16,346 INFO L168 Benchmark]: RCFGBuilder took 349.14 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 165.0 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-09-24 17:21:16,347 INFO L168 Benchmark]: TraceAbstraction took 20403.39 ms. Allocated memory was 202.4 MB in the beginning and 375.9 MB in the end (delta: 173.5 MB). Free memory was 165.0 MB in the beginning and 132.5 MB in the end (delta: 32.4 MB). Peak memory consumption was 206.0 MB. Max. memory is 7.1 GB. [2020-09-24 17:21:16,350 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 316.80 ms. Allocated memory is still 140.0 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.20 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 91.9 MB in the beginning and 180.4 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 349.14 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 165.0 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20403.39 ms. Allocated memory was 202.4 MB in the beginning and 375.9 MB in the end (delta: 173.5 MB). Free memory was 165.0 MB in the beginning and 132.5 MB in the end (delta: 32.4 MB). Peak memory consumption was 206.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: i <= 1024 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.1s, OverallIterations: 9, TraceHistogramMax: 7, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 226 SDtfs, 254 SDslu, 1158 SDs, 0 SdLazy, 1106 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 149 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=8, 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, 9 MinimizatonAttempts, 43 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 17 PreInvPairs, 28 NumberOfFragments, 23 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 58 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 17.5s InterpolantComputationTime, 477 NumberOfCodeBlocks, 477 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 468 ConstructedInterpolants, 0 QuantifiedInterpolants, 53670 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 250/518 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...