/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=SHALLOWEST --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/loop-acceleration/simple_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:34:12,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:34:12,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:34:12,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:34:12,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:34:12,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:34:12,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:34:12,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:34:12,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:34:12,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:34:12,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:34:12,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:34:12,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:34:12,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:34:12,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:34:12,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:34:12,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:34:12,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:34:12,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:34:12,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:34:12,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:34:12,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:34:12,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:34:12,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:34:12,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:34:12,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:34:12,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:34:12,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:34:12,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:34:12,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:34:12,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:34:12,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:34:12,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:34:12,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:34:12,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:34:12,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:34:12,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:34:12,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:34:12,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:34:12,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:34:12,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:34:12,408 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 [2020-10-27 01:34:12,436 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:34:12,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:34:12,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:34:12,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:34:12,438 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:34:12,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:34:12,439 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:34:12,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:34:12,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:34:12,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:34:12,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:34:12,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:34:12,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:34:12,441 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:34:12,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:34:12,441 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:34:12,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:34:12,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:34:12,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:34:12,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:34:12,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:34:12,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:34:12,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:34:12,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:34:12,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:34:12,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:34:12,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:34:12,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:34:12,445 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:34:12,445 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:34:12,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:34:12,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:34:12,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:34:12,979 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:34:12,980 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:34:12,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-10-27 01:34:13,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84bf7eb88/0d991734b2c244978b299377bb402008/FLAG36261fb03 [2020-10-27 01:34:13,648 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:34:13,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-10-27 01:34:13,656 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84bf7eb88/0d991734b2c244978b299377bb402008/FLAG36261fb03 [2020-10-27 01:34:14,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84bf7eb88/0d991734b2c244978b299377bb402008 [2020-10-27 01:34:14,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:34:14,051 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:34:14,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:34:14,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:34:14,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:34:14,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:34:14" (1/1) ... [2020-10-27 01:34:14,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f2bce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:14, skipping insertion in model container [2020-10-27 01:34:14,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:34:14" (1/1) ... [2020-10-27 01:34:14,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:34:14,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:34:14,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:34:14,263 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:34:14,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:34:14,299 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:34:14,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:14 WrapperNode [2020-10-27 01:34:14,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:34:14,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:34:14,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:34:14,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:34:14,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:14" (1/1) ... [2020-10-27 01:34:14,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:14" (1/1) ... [2020-10-27 01:34:14,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:14" (1/1) ... [2020-10-27 01:34:14,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:14" (1/1) ... [2020-10-27 01:34:14,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:14" (1/1) ... [2020-10-27 01:34:14,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:14" (1/1) ... [2020-10-27 01:34:14,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:14" (1/1) ... [2020-10-27 01:34:14,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:34:14,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:34:14,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:34:14,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:34:14,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:14" (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 [2020-10-27 01:34:14,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:34:14,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:34:14,421 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:34:14,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:34:14,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:34:14,422 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:34:14,422 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:34:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:34:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:34:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:34:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:34:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:34:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:34:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:34:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:34:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:34:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:34:14,647 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:34:14,648 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:34:14,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:34:14 BoogieIcfgContainer [2020-10-27 01:34:14,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:34:14,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:34:14,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:34:14,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:34:14,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:34:14" (1/3) ... [2020-10-27 01:34:14,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a1ba7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:34:14, skipping insertion in model container [2020-10-27 01:34:14,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:14" (2/3) ... [2020-10-27 01:34:14,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a1ba7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:34:14, skipping insertion in model container [2020-10-27 01:34:14,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:34:14" (3/3) ... [2020-10-27 01:34:14,659 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2020-10-27 01:34:14,672 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:34:14,677 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:34:14,692 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:34:14,724 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:34:14,724 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:34:14,724 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:34:14,725 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:34:14,725 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:34:14,725 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:34:14,725 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:34:14,725 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:34:14,751 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 01:34:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:34:14,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:14,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:14,767 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:14,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:14,781 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-27 01:34:14,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:14,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724499498] [2020-10-27 01:34:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:14,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:15,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:15,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:15,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:34:15,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:15,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-27 01:34:15,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:15,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:34:15,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:15,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:34:15,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:34:15,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:15,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:15,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:15,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:15,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:15,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:34:15,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:15,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:15,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:15,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:15,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:15,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724499498] [2020-10-27 01:34:15,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:34:15,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:34:15,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827552125] [2020-10-27 01:34:15,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:34:15,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:15,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:34:15,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:34:15,643 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-10-27 01:34:16,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:16,030 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-10-27 01:34:16,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:34:16,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-27 01:34:16,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:16,040 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:34:16,040 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 01:34:16,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:34:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 01:34:16,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 01:34:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 01:34:16,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 01:34:16,087 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 01:34:16,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:16,087 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 01:34:16,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:34:16,087 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 01:34:16,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:34:16,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:16,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:16,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:34:16,089 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:16,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:16,090 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-27 01:34:16,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:16,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45271285] [2020-10-27 01:34:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:16,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:16,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:16,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:16,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:16,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:34:16,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:34:16,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-27 01:34:16,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:16,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:34:16,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:16,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:34:16,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:16,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:16,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:16,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:16,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:16,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:16,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:34:16,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:16,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:16,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:16,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:16,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:16,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45271285] [2020-10-27 01:34:16,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:16,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:34:16,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152379293] [2020-10-27 01:34:16,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:34:16,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:16,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:34:16,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:34:16,559 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-27 01:34:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:16,725 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-27 01:34:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:34:16,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 01:34:16,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:16,726 INFO L225 Difference]: With dead ends: 21 [2020-10-27 01:34:16,727 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 01:34:16,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:34:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 01:34:16,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 01:34:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:34:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 01:34:16,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 01:34:16,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:16,735 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 01:34:16,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:34:16,735 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 01:34:16,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:34:16,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:16,736 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:16,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:34:16,737 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:16,738 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-27 01:34:16,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:16,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752184541] [2020-10-27 01:34:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:16,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:16,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:16,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:17,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:17,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:34:17,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:34:17,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-27 01:34:17,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:17,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:34:17,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:17,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:34:17,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:17,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:17,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:17,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:17,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:17,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:17,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:34:17,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:17,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:17,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:17,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:17,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:17,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752184541] [2020-10-27 01:34:17,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:17,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:34:17,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041602960] [2020-10-27 01:34:17,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:34:17,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:17,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:34:17,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:34:17,186 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-10-27 01:34:17,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:17,417 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 01:34:17,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:34:17,418 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-27 01:34:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:17,419 INFO L225 Difference]: With dead ends: 22 [2020-10-27 01:34:17,419 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 01:34:17,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:34:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 01:34:17,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 01:34:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:34:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 01:34:17,426 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-27 01:34:17,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:17,427 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 01:34:17,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:34:17,427 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 01:34:17,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:34:17,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:17,428 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:17,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:34:17,428 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:17,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:17,429 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-27 01:34:17,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:17,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878622759] [2020-10-27 01:34:17,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:17,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:17,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:17,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:17,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:17,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:34:17,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:34:17,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-27 01:34:17,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:17,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:34:17,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:17,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:34:17,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:17,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:17,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:17,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:17,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:17,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:17,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:34:17,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:17,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:17,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:17,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:17,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:17,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878622759] [2020-10-27 01:34:17,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:17,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:34:17,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466962303] [2020-10-27 01:34:17,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:34:17,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:17,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:34:17,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:34:17,995 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2020-10-27 01:34:18,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:18,317 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-27 01:34:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:34:18,318 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-27 01:34:18,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:18,318 INFO L225 Difference]: With dead ends: 23 [2020-10-27 01:34:18,319 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 01:34:18,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:34:18,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 01:34:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 01:34:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:34:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 01:34:18,326 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-27 01:34:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:18,326 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 01:34:18,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:34:18,326 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 01:34:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:34:18,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:18,327 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:18,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:34:18,328 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:18,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:18,328 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-27 01:34:18,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:18,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428999918] [2020-10-27 01:34:18,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:18,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:18,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:18,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:18,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:18,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:34:18,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:34:18,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-27 01:34:18,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:18,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:34:18,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:18,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:34:18,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:18,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:18,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:18,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:18,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:18,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:18,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:34:18,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:18,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:18,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:18,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:18,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:18,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428999918] [2020-10-27 01:34:18,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:18,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:34:18,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353947518] [2020-10-27 01:34:18,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:34:18,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:18,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:34:18,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:34:18,776 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-27 01:34:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:19,035 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 01:34:19,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:34:19,036 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 01:34:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:19,036 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:34:19,037 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:34:19,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:34:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:34:19,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 01:34:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 01:34:19,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 01:34:19,044 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-27 01:34:19,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:19,044 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 01:34:19,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:34:19,044 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 01:34:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:34:19,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:19,045 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:19,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:34:19,046 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:19,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:19,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-27 01:34:19,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:19,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549502423] [2020-10-27 01:34:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:19,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:19,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:19,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:19,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:19,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:34:19,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:34:19,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-27 01:34:19,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:19,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:34:19,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:19,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:34:19,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:19,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:19,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:19,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:19,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:19,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:19,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:19,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:19,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:19,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:19,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549502423] [2020-10-27 01:34:19,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:19,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:34:19,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771890798] [2020-10-27 01:34:19,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:34:19,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:19,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:34:19,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:34:19,627 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 11 states. [2020-10-27 01:34:20,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:20,060 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-27 01:34:20,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:34:20,061 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-10-27 01:34:20,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:20,065 INFO L225 Difference]: With dead ends: 25 [2020-10-27 01:34:20,065 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:34:20,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:34:20,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:34:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:34:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:34:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 01:34:20,076 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-27 01:34:20,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:20,076 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 01:34:20,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:34:20,077 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 01:34:20,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:34:20,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:20,077 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:20,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:34:20,078 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:20,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:20,078 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-27 01:34:20,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:20,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964413599] [2020-10-27 01:34:20,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:20,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:20,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:20,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:20,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:20,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:34:20,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:34:20,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-27 01:34:20,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:20,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:34:20,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:20,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:34:20,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:20,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:20,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:20,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:20,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:20,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:20,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:20,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:20,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:20,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964413599] [2020-10-27 01:34:20,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:20,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:34:20,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824686275] [2020-10-27 01:34:20,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:34:20,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:20,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:34:20,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:34:20,951 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-27 01:34:21,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:21,333 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-27 01:34:21,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:34:21,333 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-27 01:34:21,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:21,334 INFO L225 Difference]: With dead ends: 26 [2020-10-27 01:34:21,334 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 01:34:21,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:34:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 01:34:21,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 01:34:21,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:34:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-27 01:34:21,343 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-27 01:34:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:21,343 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-27 01:34:21,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:34:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-27 01:34:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:34:21,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:21,345 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:21,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:34:21,345 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:21,346 INFO L82 PathProgramCache]: Analyzing trace with hash 611230302, now seen corresponding path program 7 times [2020-10-27 01:34:21,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:21,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419583353] [2020-10-27 01:34:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:21,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:21,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:21,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:21,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:21,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:34:21,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:34:21,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-10-27 01:34:21,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:21,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:34:21,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:21,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:34:21,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:22,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:22,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:22,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:22,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:22,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:22,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:22,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:22,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:22,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:22,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:22,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:22,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419583353] [2020-10-27 01:34:22,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:22,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:34:22,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168221542] [2020-10-27 01:34:22,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:34:22,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:22,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:34:22,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:34:22,172 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 13 states. [2020-10-27 01:34:22,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:22,780 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-27 01:34:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:34:22,780 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2020-10-27 01:34:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:22,781 INFO L225 Difference]: With dead ends: 20 [2020-10-27 01:34:22,781 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 01:34:22,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:34:22,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 01:34:22,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 01:34:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 01:34:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 01:34:22,785 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-27 01:34:22,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:22,786 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 01:34:22,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:34:22,786 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 01:34:22,786 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 01:34:22,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:34:22,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 01:34:23,089 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-27 01:34:23,090 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-27 01:34:23,090 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-27 01:34:23,090 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-27 01:34:23,090 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:34:23,091 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|)) [2020-10-27 01:34:23,091 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:34:23,091 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:34:23,091 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 01:34:23,091 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 01:34:23,091 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:34:23,091 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 12 20) the Hoare annotation is: true [2020-10-27 01:34:23,091 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 12 20) no Hoare annotation was computed. [2020-10-27 01:34:23,091 INFO L270 CegarLoopResult]: At program point L15-2(lines 15 17) the Hoare annotation is: (= main_~x~0 (* (div main_~x~0 2) 2)) [2020-10-27 01:34:23,092 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 12 20) no Hoare annotation was computed. [2020-10-27 01:34:23,092 INFO L270 CegarLoopResult]: At program point L15-3(lines 15 17) the Hoare annotation is: (= main_~x~0 (* (div main_~x~0 2) 2)) [2020-10-27 01:34:23,092 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-10-27 01:34:23,092 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-10-27 01:34:23,092 INFO L270 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-27 01:34:23,092 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-10-27 01:34:23,092 INFO L274 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-10-27 01:34:23,092 INFO L274 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-10-27 01:34:23,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:34:23 BoogieIcfgContainer [2020-10-27 01:34:23,109 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:34:23,118 INFO L168 Benchmark]: Toolchain (without parser) took 9064.78 ms. Allocated memory was 158.3 MB in the beginning and 229.6 MB in the end (delta: 71.3 MB). Free memory was 134.1 MB in the beginning and 123.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 83.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:23,118 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 125.8 MB. Free memory is still 84.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:34:23,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.56 ms. Allocated memory is still 158.3 MB. Free memory was 133.6 MB in the beginning and 124.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:23,120 INFO L168 Benchmark]: Boogie Preprocessor took 35.00 ms. Allocated memory is still 158.3 MB. Free memory was 124.4 MB in the beginning and 123.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:23,121 INFO L168 Benchmark]: RCFGBuilder took 312.62 ms. Allocated memory is still 158.3 MB. Free memory was 122.9 MB in the beginning and 111.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:23,122 INFO L168 Benchmark]: TraceAbstraction took 8457.85 ms. Allocated memory was 158.3 MB in the beginning and 229.6 MB in the end (delta: 71.3 MB). Free memory was 110.8 MB in the beginning and 123.3 MB in the end (delta: -12.5 MB). Peak memory consumption was 59.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:23,134 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 125.8 MB. Free memory is still 84.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 247.56 ms. Allocated memory is still 158.3 MB. Free memory was 133.6 MB in the beginning and 124.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.00 ms. Allocated memory is still 158.3 MB. Free memory was 124.4 MB in the beginning and 123.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 312.62 ms. Allocated memory is still 158.3 MB. Free memory was 122.9 MB in the beginning and 111.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8457.85 ms. Allocated memory was 158.3 MB in the beginning and 229.6 MB in the end (delta: 71.3 MB). Free memory was 110.8 MB in the beginning and 123.3 MB in the end (delta: -12.5 MB). Peak memory consumption was 59.0 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: 15]: Loop Invariant Derived loop invariant: x == x / 2 * 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.0s, OverallIterations: 8, TraceHistogramMax: 7, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 68 SDslu, 273 SDs, 0 SdLazy, 456 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 32 PreInvPairs, 43 NumberOfFragments, 53 HoareAnnotationTreeSize, 32 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 607 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 9742 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 1 PerfectInterpolantSequences, 0/84 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...