/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:33:17,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:33:17,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:33:17,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:33:17,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:33:17,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:33:17,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:33:17,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:33:17,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:33:17,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:33:17,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:33:17,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:33:17,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:33:17,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:33:17,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:33:17,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:33:17,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:33:17,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:33:17,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:33:17,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:33:17,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:33:17,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:33:17,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:33:17,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:33:17,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:33:17,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:33:17,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:33:17,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:33:17,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:33:17,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:33:17,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:33:17,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:33:17,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:33:17,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:33:17,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:33:17,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:33:17,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:33:17,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:33:17,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:33:17,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:33:17,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:33:17,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:33:17,555 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:33:17,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:33:17,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:33:17,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:33:17,560 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:33:17,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:33:17,560 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:33:17,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:33:17,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:33:17,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:33:17,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:33:17,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:33:17,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:33:17,563 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:33:17,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:33:17,563 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:33:17,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:33:17,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:33:17,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:33:17,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:33:17,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:33:17,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:33:17,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:33:17,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:33:17,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:33:17,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:33:17,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:33:17,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:33:17,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:33:17,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:33:18,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:33:18,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:33:18,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:33:18,035 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:33:18,036 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:33:18,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-10-29 09:33:18,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0da7d18e4/0ec6d19329e444fcaa0cbda101452c45/FLAG523466dd1 [2020-10-29 09:33:18,702 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:33:18,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-10-29 09:33:18,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0da7d18e4/0ec6d19329e444fcaa0cbda101452c45/FLAG523466dd1 [2020-10-29 09:33:19,051 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0da7d18e4/0ec6d19329e444fcaa0cbda101452c45 [2020-10-29 09:33:19,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:33:19,065 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:33:19,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:33:19,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:33:19,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:33:19,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:33:19" (1/1) ... [2020-10-29 09:33:19,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f33d0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:19, skipping insertion in model container [2020-10-29 09:33:19,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:33:19" (1/1) ... [2020-10-29 09:33:19,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:33:19,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:33:19,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:33:19,268 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:33:19,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:33:19,306 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:33:19,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:19 WrapperNode [2020-10-29 09:33:19,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:33:19,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:33:19,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:33:19,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:33:19,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:19" (1/1) ... [2020-10-29 09:33:19,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:19" (1/1) ... [2020-10-29 09:33:19,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:19" (1/1) ... [2020-10-29 09:33:19,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:19" (1/1) ... [2020-10-29 09:33:19,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:19" (1/1) ... [2020-10-29 09:33:19,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:19" (1/1) ... [2020-10-29 09:33:19,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:19" (1/1) ... [2020-10-29 09:33:19,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:33:19,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:33:19,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:33:19,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:33:19,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:33:19,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:33:19,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:33:19,452 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:33:19,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:33:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:33:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:33:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:33:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:33:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:33:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:33:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:33:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:33:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:33:19,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:33:19,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:33:19,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:33:19,847 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:33:19,847 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:33:19,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:33:19 BoogieIcfgContainer [2020-10-29 09:33:19,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:33:19,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:33:19,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:33:19,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:33:19,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:33:19" (1/3) ... [2020-10-29 09:33:19,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290b3f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:33:19, skipping insertion in model container [2020-10-29 09:33:19,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:19" (2/3) ... [2020-10-29 09:33:19,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290b3f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:33:19, skipping insertion in model container [2020-10-29 09:33:19,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:33:19" (3/3) ... [2020-10-29 09:33:19,859 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-10-29 09:33:19,874 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:33:19,879 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:33:19,895 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:33:19,926 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:33:19,926 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:33:19,926 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:33:19,927 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:33:19,927 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:33:19,927 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:33:19,927 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:33:19,927 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:33:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-29 09:33:19,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:33:19,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:19,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:19,955 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:19,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:19,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1452995030, now seen corresponding path program 1 times [2020-10-29 09:33:19,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:19,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662564956] [2020-10-29 09:33:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:20,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:20,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:20,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:33:20,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:20,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-29 09:33:20,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:20,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:33:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:33:20,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:33:20,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:20,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:20,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:20,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:20,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:20,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 09:33:20,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:20,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:20,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:20,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:20,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:20,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:20,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662564956] [2020-10-29 09:33:20,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:20,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:20,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71231645] [2020-10-29 09:33:20,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:20,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:20,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:20,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:20,622 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-10-29 09:33:20,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:20,870 INFO L93 Difference]: Finished difference Result 62 states and 97 transitions. [2020-10-29 09:33:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:20,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-29 09:33:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:20,883 INFO L225 Difference]: With dead ends: 62 [2020-10-29 09:33:20,884 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:33:20,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:20,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:33:20,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2020-10-29 09:33:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:33:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 51 transitions. [2020-10-29 09:33:20,937 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 51 transitions. Word has length 17 [2020-10-29 09:33:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:20,937 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 51 transitions. [2020-10-29 09:33:20,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 51 transitions. [2020-10-29 09:33:20,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:33:20,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:20,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:20,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:33:20,940 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:20,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:20,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2133053400, now seen corresponding path program 1 times [2020-10-29 09:33:20,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:20,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163605584] [2020-10-29 09:33:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:20,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:21,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:21,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:33:21,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:21,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-29 09:33:21,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:21,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:21,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:21,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:33:21,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:33:21,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:21,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:21,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:21,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:21,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:21,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:21,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 09:33:21,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:21,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:21,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:21,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163605584] [2020-10-29 09:33:21,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:21,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:21,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929670961] [2020-10-29 09:33:21,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:21,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:21,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:21,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:21,131 INFO L87 Difference]: Start difference. First operand 32 states and 51 transitions. Second operand 4 states. [2020-10-29 09:33:21,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:21,341 INFO L93 Difference]: Finished difference Result 69 states and 115 transitions. [2020-10-29 09:33:21,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:21,342 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-29 09:33:21,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:21,344 INFO L225 Difference]: With dead ends: 69 [2020-10-29 09:33:21,344 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:33:21,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:21,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:33:21,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-29 09:33:21,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:33:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 67 transitions. [2020-10-29 09:33:21,366 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 67 transitions. Word has length 17 [2020-10-29 09:33:21,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:21,367 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 67 transitions. [2020-10-29 09:33:21,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:21,369 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 67 transitions. [2020-10-29 09:33:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:33:21,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:21,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:21,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:33:21,371 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:21,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2099831584, now seen corresponding path program 1 times [2020-10-29 09:33:21,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:21,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021790439] [2020-10-29 09:33:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:21,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:21,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:21,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:21,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:33:21,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:21,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-29 09:33:21,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:21,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:21,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:21,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:33:21,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:33:21,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:21,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:21,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:21,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:21,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:21,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:21,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:33:21,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:21,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:21,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:21,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:21,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:21,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:21,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021790439] [2020-10-29 09:33:21,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:21,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:21,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677827745] [2020-10-29 09:33:21,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:21,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:21,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:21,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:21,702 INFO L87 Difference]: Start difference. First operand 42 states and 67 transitions. Second operand 4 states. [2020-10-29 09:33:21,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:21,827 INFO L93 Difference]: Finished difference Result 65 states and 102 transitions. [2020-10-29 09:33:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:21,827 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-29 09:33:21,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:21,828 INFO L225 Difference]: With dead ends: 65 [2020-10-29 09:33:21,829 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 09:33:21,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:21,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 09:33:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-29 09:33:21,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:33:21,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 69 transitions. [2020-10-29 09:33:21,841 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 69 transitions. Word has length 18 [2020-10-29 09:33:21,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:21,842 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 69 transitions. [2020-10-29 09:33:21,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:21,842 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2020-10-29 09:33:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:33:21,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:21,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:21,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:33:21,844 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:21,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:21,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1706804574, now seen corresponding path program 1 times [2020-10-29 09:33:21,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:21,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503225749] [2020-10-29 09:33:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:21,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:21,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:21,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:33:21,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:21,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 09:33:21,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:21,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:21,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:21,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:33:21,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:33:21,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:21,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:21,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:21,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:21,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:21,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:21,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:33:21,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:21,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:21,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:21,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:21,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:21,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:21,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503225749] [2020-10-29 09:33:21,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:21,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:21,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249229586] [2020-10-29 09:33:21,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:21,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:21,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:21,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:21,957 INFO L87 Difference]: Start difference. First operand 45 states and 69 transitions. Second operand 4 states. [2020-10-29 09:33:22,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:22,114 INFO L93 Difference]: Finished difference Result 113 states and 182 transitions. [2020-10-29 09:33:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:22,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-29 09:33:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:22,116 INFO L225 Difference]: With dead ends: 113 [2020-10-29 09:33:22,117 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 09:33:22,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:22,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 09:33:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-29 09:33:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 09:33:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 118 transitions. [2020-10-29 09:33:22,130 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 118 transitions. Word has length 18 [2020-10-29 09:33:22,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:22,131 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 118 transitions. [2020-10-29 09:33:22,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 118 transitions. [2020-10-29 09:33:22,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:33:22,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:22,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:22,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:33:22,133 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:22,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:22,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1026746204, now seen corresponding path program 1 times [2020-10-29 09:33:22,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:22,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867664476] [2020-10-29 09:33:22,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:22,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:22,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:22,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:33:22,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:22,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-29 09:33:22,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:22,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:22,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:22,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:33:22,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:33:22,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:22,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:22,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:22,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:22,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:22,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:22,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:33:22,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:22,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:22,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:22,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:22,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:22,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:22,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867664476] [2020-10-29 09:33:22,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:22,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:22,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851856850] [2020-10-29 09:33:22,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:22,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:22,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:22,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:22,252 INFO L87 Difference]: Start difference. First operand 76 states and 118 transitions. Second operand 4 states. [2020-10-29 09:33:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:22,374 INFO L93 Difference]: Finished difference Result 96 states and 149 transitions. [2020-10-29 09:33:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:22,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-29 09:33:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:22,376 INFO L225 Difference]: With dead ends: 96 [2020-10-29 09:33:22,376 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 09:33:22,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 09:33:22,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-10-29 09:33:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 09:33:22,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 116 transitions. [2020-10-29 09:33:22,387 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 116 transitions. Word has length 18 [2020-10-29 09:33:22,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:22,387 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 116 transitions. [2020-10-29 09:33:22,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:22,388 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 116 transitions. [2020-10-29 09:33:22,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:33:22,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:22,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:22,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:33:22,389 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:22,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:22,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1378003427, now seen corresponding path program 1 times [2020-10-29 09:33:22,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:22,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223797023] [2020-10-29 09:33:22,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:22,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:22,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:22,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:33:22,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:22,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 09:33:22,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:22,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:22,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:22,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:33:22,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:33:22,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:22,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:22,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:22,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:22,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:22,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:22,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:22,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:22,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:22,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:22,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:22,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:22,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:22,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223797023] [2020-10-29 09:33:22,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:22,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:22,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290512721] [2020-10-29 09:33:22,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:22,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:22,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:22,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:22,500 INFO L87 Difference]: Start difference. First operand 76 states and 116 transitions. Second operand 4 states. [2020-10-29 09:33:22,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:22,626 INFO L93 Difference]: Finished difference Result 132 states and 205 transitions. [2020-10-29 09:33:22,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:22,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-29 09:33:22,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:22,628 INFO L225 Difference]: With dead ends: 132 [2020-10-29 09:33:22,628 INFO L226 Difference]: Without dead ends: 129 [2020-10-29 09:33:22,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:22,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-29 09:33:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 104. [2020-10-29 09:33:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 09:33:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 158 transitions. [2020-10-29 09:33:22,641 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 158 transitions. Word has length 19 [2020-10-29 09:33:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:22,641 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 158 transitions. [2020-10-29 09:33:22,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:22,641 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 158 transitions. [2020-10-29 09:33:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:33:22,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:22,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:22,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:33:22,643 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:22,644 INFO L82 PathProgramCache]: Analyzing trace with hash 2058061797, now seen corresponding path program 1 times [2020-10-29 09:33:22,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:22,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128760044] [2020-10-29 09:33:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:22,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:22,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:22,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:33:22,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:22,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 09:33:22,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:22,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:22,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:22,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:33:22,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:33:22,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:22,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:22,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:22,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:22,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:22,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:22,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:22,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:22,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:22,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:22,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:22,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:22,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:22,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128760044] [2020-10-29 09:33:22,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:22,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:22,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172213629] [2020-10-29 09:33:22,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:22,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:22,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:22,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:22,739 INFO L87 Difference]: Start difference. First operand 104 states and 158 transitions. Second operand 4 states. [2020-10-29 09:33:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:22,890 INFO L93 Difference]: Finished difference Result 232 states and 357 transitions. [2020-10-29 09:33:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:22,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-29 09:33:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:22,891 INFO L225 Difference]: With dead ends: 232 [2020-10-29 09:33:22,892 INFO L226 Difference]: Without dead ends: 137 [2020-10-29 09:33:22,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-29 09:33:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-29 09:33:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-29 09:33:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 200 transitions. [2020-10-29 09:33:22,906 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 200 transitions. Word has length 19 [2020-10-29 09:33:22,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:22,906 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 200 transitions. [2020-10-29 09:33:22,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 200 transitions. [2020-10-29 09:33:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:33:22,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:22,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:22,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:33:22,908 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:22,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:22,909 INFO L82 PathProgramCache]: Analyzing trace with hash -224886967, now seen corresponding path program 1 times [2020-10-29 09:33:22,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:22,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810818867] [2020-10-29 09:33:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:22,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:22,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:22,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:22,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:33:22,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:22,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-29 09:33:22,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:22,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:22,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:22,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:33:22,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:33:22,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:23,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:23,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:23,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:23,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:23,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:23,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:23,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:23,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:23,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:23,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:23,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:23,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:23,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:23,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810818867] [2020-10-29 09:33:23,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:23,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:23,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590175872] [2020-10-29 09:33:23,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:23,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:23,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:23,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:23,054 INFO L87 Difference]: Start difference. First operand 136 states and 200 transitions. Second operand 4 states. [2020-10-29 09:33:23,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:23,168 INFO L93 Difference]: Finished difference Result 232 states and 343 transitions. [2020-10-29 09:33:23,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:23,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-29 09:33:23,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:23,171 INFO L225 Difference]: With dead ends: 232 [2020-10-29 09:33:23,171 INFO L226 Difference]: Without dead ends: 229 [2020-10-29 09:33:23,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:23,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-29 09:33:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 196. [2020-10-29 09:33:23,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-29 09:33:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 284 transitions. [2020-10-29 09:33:23,188 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 284 transitions. Word has length 20 [2020-10-29 09:33:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:23,188 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 284 transitions. [2020-10-29 09:33:23,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 284 transitions. [2020-10-29 09:33:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:33:23,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:23,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:23,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:33:23,190 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:23,191 INFO L82 PathProgramCache]: Analyzing trace with hash 455171403, now seen corresponding path program 1 times [2020-10-29 09:33:23,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:23,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614563671] [2020-10-29 09:33:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:23,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:23,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:23,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:23,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:33:23,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:23,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-29 09:33:23,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:23,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:23,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:23,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:33:23,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:33:23,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:23,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:23,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:23,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:23,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:23,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:23,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:23,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:23,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:23,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:23,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:23,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:23,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:23,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614563671] [2020-10-29 09:33:23,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:23,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:23,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502373032] [2020-10-29 09:33:23,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:23,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:23,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:23,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:23,336 INFO L87 Difference]: Start difference. First operand 196 states and 284 transitions. Second operand 4 states. [2020-10-29 09:33:23,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:23,619 INFO L93 Difference]: Finished difference Result 440 states and 639 transitions. [2020-10-29 09:33:23,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:23,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-29 09:33:23,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:23,621 INFO L225 Difference]: With dead ends: 440 [2020-10-29 09:33:23,621 INFO L226 Difference]: Without dead ends: 253 [2020-10-29 09:33:23,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:23,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-29 09:33:23,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2020-10-29 09:33:23,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-29 09:33:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 348 transitions. [2020-10-29 09:33:23,639 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 348 transitions. Word has length 20 [2020-10-29 09:33:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:23,639 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 348 transitions. [2020-10-29 09:33:23,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 348 transitions. [2020-10-29 09:33:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:33:23,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:23,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:23,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:33:23,641 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:23,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:23,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1625128942, now seen corresponding path program 1 times [2020-10-29 09:33:23,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:23,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552396453] [2020-10-29 09:33:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:23,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:23,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:23,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:23,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:23,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:33:23,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:23,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-29 09:33:23,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:23,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:23,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:23,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:33:23,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:33:23,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:23,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:23,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:23,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:23,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:23,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:23,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:23,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:23,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:23,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:23,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552396453] [2020-10-29 09:33:23,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:23,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:23,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677249963] [2020-10-29 09:33:23,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:23,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:23,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:23,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:23,847 INFO L87 Difference]: Start difference. First operand 252 states and 348 transitions. Second operand 4 states. [2020-10-29 09:33:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:23,958 INFO L93 Difference]: Finished difference Result 386 states and 535 transitions. [2020-10-29 09:33:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:23,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-29 09:33:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:23,960 INFO L225 Difference]: With dead ends: 386 [2020-10-29 09:33:23,960 INFO L226 Difference]: Without dead ends: 267 [2020-10-29 09:33:23,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-29 09:33:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2020-10-29 09:33:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-29 09:33:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 360 transitions. [2020-10-29 09:33:23,976 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 360 transitions. Word has length 21 [2020-10-29 09:33:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:23,976 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 360 transitions. [2020-10-29 09:33:23,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 360 transitions. [2020-10-29 09:33:23,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:33:23,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:23,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:23,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:33:23,979 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:23,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:23,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1232101932, now seen corresponding path program 1 times [2020-10-29 09:33:23,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:23,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665871962] [2020-10-29 09:33:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:23,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:24,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:24,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:24,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:33:24,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:24,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-29 09:33:24,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:24,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:24,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:24,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:33:24,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:33:24,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:24,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:24,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:24,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:24,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:24,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:24,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 09:33:24,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:24,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:24,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:24,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:24,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:24,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:24,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665871962] [2020-10-29 09:33:24,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:24,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:24,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838616073] [2020-10-29 09:33:24,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:24,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:24,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:24,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:24,141 INFO L87 Difference]: Start difference. First operand 266 states and 360 transitions. Second operand 4 states. [2020-10-29 09:33:24,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:24,270 INFO L93 Difference]: Finished difference Result 429 states and 570 transitions. [2020-10-29 09:33:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:24,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-29 09:33:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:24,273 INFO L225 Difference]: With dead ends: 429 [2020-10-29 09:33:24,274 INFO L226 Difference]: Without dead ends: 426 [2020-10-29 09:33:24,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:24,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-29 09:33:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 394. [2020-10-29 09:33:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-29 09:33:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 520 transitions. [2020-10-29 09:33:24,293 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 520 transitions. Word has length 21 [2020-10-29 09:33:24,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:24,293 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 520 transitions. [2020-10-29 09:33:24,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 520 transitions. [2020-10-29 09:33:24,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:33:24,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:24,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:24,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:33:24,295 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:24,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:24,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1912160302, now seen corresponding path program 1 times [2020-10-29 09:33:24,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:24,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21760311] [2020-10-29 09:33:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:24,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:24,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:24,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:24,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:33:24,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:24,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-29 09:33:24,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:24,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:24,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:24,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:33:24,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:33:24,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:24,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:24,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:24,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:24,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:24,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:24,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:24,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:24,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:24,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:24,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:24,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:24,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:24,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21760311] [2020-10-29 09:33:24,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:24,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:24,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371359456] [2020-10-29 09:33:24,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:24,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:24,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:24,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:24,432 INFO L87 Difference]: Start difference. First operand 394 states and 520 transitions. Second operand 4 states. [2020-10-29 09:33:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:24,539 INFO L93 Difference]: Finished difference Result 858 states and 1112 transitions. [2020-10-29 09:33:24,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:24,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-29 09:33:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:24,540 INFO L225 Difference]: With dead ends: 858 [2020-10-29 09:33:24,540 INFO L226 Difference]: Without dead ends: 0 [2020-10-29 09:33:24,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:24,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-29 09:33:24,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-29 09:33:24,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-29 09:33:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-29 09:33:24,542 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-10-29 09:33:24,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:24,543 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-29 09:33:24,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:24,543 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-29 09:33:24,543 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-29 09:33:24,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:33:24,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-29 09:33:24,877 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 32 [2020-10-29 09:33:24,925 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-29 09:33:24,925 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-29 09:33:24,925 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-29 09:33:24,926 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-29 09:33:24,926 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-29 09:33:24,926 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-29 09:33:24,926 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-29 09:33:24,926 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-29 09:33:24,926 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-29 09:33:24,927 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-29 09:33:24,927 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-29 09:33:24,927 INFO L274 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-10-29 09:33:24,927 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 95) no Hoare annotation was computed. [2020-10-29 09:33:24,927 INFO L277 CegarLoopResult]: At program point L85-1(lines 26 90) the Hoare annotation is: true [2020-10-29 09:33:24,927 INFO L274 CegarLoopResult]: For program point L81(line 81) no Hoare annotation was computed. [2020-10-29 09:33:24,927 INFO L274 CegarLoopResult]: For program point L65-1(lines 26 90) no Hoare annotation was computed. [2020-10-29 09:33:24,927 INFO L274 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-10-29 09:33:24,928 INFO L274 CegarLoopResult]: For program point L86(line 86) no Hoare annotation was computed. [2020-10-29 09:33:24,928 INFO L270 CegarLoopResult]: At program point L86-1(lines 7 95) the Hoare annotation is: false [2020-10-29 09:33:24,928 INFO L274 CegarLoopResult]: For program point L70-1(lines 26 90) no Hoare annotation was computed. [2020-10-29 09:33:24,928 INFO L274 CegarLoopResult]: For program point L66(line 66) no Hoare annotation was computed. [2020-10-29 09:33:24,928 INFO L277 CegarLoopResult]: At program point L91(lines 7 95) the Hoare annotation is: true [2020-10-29 09:33:24,928 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 95) no Hoare annotation was computed. [2020-10-29 09:33:24,928 INFO L274 CegarLoopResult]: For program point L75-1(lines 26 90) no Hoare annotation was computed. [2020-10-29 09:33:24,929 INFO L274 CegarLoopResult]: For program point L71(line 71) no Hoare annotation was computed. [2020-10-29 09:33:24,929 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 95) the Hoare annotation is: true [2020-10-29 09:33:24,929 INFO L274 CegarLoopResult]: For program point L59-1(lines 26 90) no Hoare annotation was computed. [2020-10-29 09:33:24,929 INFO L274 CegarLoopResult]: For program point L55-1(lines 26 90) no Hoare annotation was computed. [2020-10-29 09:33:24,929 INFO L274 CegarLoopResult]: For program point L51-1(lines 26 90) no Hoare annotation was computed. [2020-10-29 09:33:24,929 INFO L274 CegarLoopResult]: For program point L80-1(lines 26 90) no Hoare annotation was computed. [2020-10-29 09:33:24,929 INFO L274 CegarLoopResult]: For program point L47-1(lines 26 90) no Hoare annotation was computed. [2020-10-29 09:33:24,929 INFO L274 CegarLoopResult]: For program point L76(line 76) no Hoare annotation was computed. [2020-10-29 09:33:24,929 INFO L274 CegarLoopResult]: For program point L43(lines 43 45) no Hoare annotation was computed. [2020-10-29 09:33:24,930 INFO L274 CegarLoopResult]: For program point L43-2(lines 26 90) no Hoare annotation was computed. [2020-10-29 09:33:24,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:33:24 BoogieIcfgContainer [2020-10-29 09:33:24,942 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:33:24,944 INFO L168 Benchmark]: Toolchain (without parser) took 5883.80 ms. Allocated memory was 151.0 MB in the beginning and 224.4 MB in the end (delta: 73.4 MB). Free memory was 126.0 MB in the beginning and 168.6 MB in the end (delta: -42.6 MB). Peak memory consumption was 100.2 MB. Max. memory is 8.0 GB. [2020-10-29 09:33:24,945 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:33:24,946 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.82 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 115.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:33:24,946 INFO L168 Benchmark]: Boogie Preprocessor took 41.11 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:33:24,947 INFO L168 Benchmark]: RCFGBuilder took 499.37 ms. Allocated memory is still 151.0 MB. Free memory was 113.9 MB in the beginning and 132.6 MB in the end (delta: -18.7 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. [2020-10-29 09:33:24,948 INFO L168 Benchmark]: TraceAbstraction took 5090.67 ms. Allocated memory was 151.0 MB in the beginning and 224.4 MB in the end (delta: 73.4 MB). Free memory was 132.0 MB in the beginning and 168.6 MB in the end (delta: -36.6 MB). Peak memory consumption was 105.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:33:24,951 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 237.82 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 115.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.11 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 499.37 ms. Allocated memory is still 151.0 MB. Free memory was 113.9 MB in the beginning and 132.6 MB in the end (delta: -18.7 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5090.67 ms. Allocated memory was 151.0 MB in the beginning and 224.4 MB in the end (delta: 73.4 MB). Free memory was 132.0 MB in the beginning and 168.6 MB in the end (delta: -36.6 MB). Peak memory consumption was 105.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 12, TraceHistogramMax: 1, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 577 SDtfs, 754 SDslu, 94 SDs, 0 SdLazy, 420 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=394occurred in iteration=11, 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, 12 MinimizatonAttempts, 124 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 19 PreInvPairs, 54 NumberOfFragments, 38 HoareAnnotationTreeSize, 19 FomulaSimplifications, 52246 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 229 NumberOfCodeBlocks, 229 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 217 ConstructedInterpolants, 0 QuantifiedInterpolants, 12994 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 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...