/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:17:36,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:17:36,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:17:36,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 00:17:36,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 00:17:36,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 00:17:36,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 00:17:36,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 00:17:36,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 00:17:36,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 00:17:36,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 00:17:36,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 00:17:36,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:17:36,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:17:36,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:17:36,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:17:36,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:17:36,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:17:36,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:17:36,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:17:36,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:17:36,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:17:36,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:17:36,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:17:36,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-24 00:17:36,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-24 00:17:36,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-24 00:17:36,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-24 00:17:36,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-24 00:17:36,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-24 00:17:36,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-24 00:17:36,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-24 00:17:36,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-24 00:17:36,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-24 00:17:36,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-24 00:17:36,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-24 00:17:36,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-24 00:17:36,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-24 00:17:36,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 00:17:36,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 00:17:36,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 00:17:36,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:17:36,806 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:17:36,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:17:36,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:17:36,809 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:17:36,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:17:36,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:17:36,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:17:36,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:17:36,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:17:36,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:17:36,810 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:17:36,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:17:36,811 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:17:36,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:17:36,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:17:36,811 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:17:36,812 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:17:36,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:17:36,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:17:36,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:17:36,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:17:36,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:17:36,813 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:17:37,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:17:37,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:17:37,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:17:37,236 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:17:37,237 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:17:37,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2021-02-24 00:17:37,334 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e74c3fa75/8a9570a3246a463c870f2c66316d2a0a/FLAGb65e977ba [2021-02-24 00:17:38,007 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:17:38,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2021-02-24 00:17:38,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e74c3fa75/8a9570a3246a463c870f2c66316d2a0a/FLAGb65e977ba [2021-02-24 00:17:38,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e74c3fa75/8a9570a3246a463c870f2c66316d2a0a [2021-02-24 00:17:38,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:17:38,394 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:17:38,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:17:38,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:17:38,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:17:38,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:38" (1/1) ... [2021-02-24 00:17:38,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c79002a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:38, skipping insertion in model container [2021-02-24 00:17:38,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:38" (1/1) ... [2021-02-24 00:17:38,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:17:38,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:17:38,581 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c[327,340] [2021-02-24 00:17:38,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:38,607 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:17:38,621 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c[327,340] [2021-02-24 00:17:38,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:38,640 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:17:38,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:38 WrapperNode [2021-02-24 00:17:38,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:17:38,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:17:38,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:17:38,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:17:38,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:38" (1/1) ... [2021-02-24 00:17:38,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:38" (1/1) ... [2021-02-24 00:17:38,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:38" (1/1) ... [2021-02-24 00:17:38,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:38" (1/1) ... [2021-02-24 00:17:38,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:38" (1/1) ... [2021-02-24 00:17:38,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:38" (1/1) ... [2021-02-24 00:17:38,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:38" (1/1) ... [2021-02-24 00:17:38,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:17:38,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:17:38,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:17:38,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:17:38,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-02-24 00:17:38,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:17:38,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:17:38,784 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:17:38,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:17:38,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:17:38,784 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:17:38,784 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:17:38,785 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:17:38,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:17:38,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:17:38,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:17:38,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:17:38,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:17:38,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:17:38,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:17:38,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:17:38,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:17:39,046 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:17:39,047 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:17:39,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:39 BoogieIcfgContainer [2021-02-24 00:17:39,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:17:39,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:17:39,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:17:39,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:17:39,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:17:38" (1/3) ... [2021-02-24 00:17:39,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2356c228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:39, skipping insertion in model container [2021-02-24 00:17:39,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:38" (2/3) ... [2021-02-24 00:17:39,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2356c228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:39, skipping insertion in model container [2021-02-24 00:17:39,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:39" (3/3) ... [2021-02-24 00:17:39,076 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2021-02-24 00:17:39,095 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:17:39,103 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:17:39,155 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:17:39,207 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:17:39,208 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:17:39,208 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:17:39,208 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:17:39,208 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:17:39,209 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:17:39,209 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:17:39,209 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:17:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2021-02-24 00:17:39,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-24 00:17:39,238 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:39,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:17:39,239 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:39,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:39,300 INFO L82 PathProgramCache]: Analyzing trace with hash 645207053, now seen corresponding path program 1 times [2021-02-24 00:17:39,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:39,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708572746] [2021-02-24 00:17:39,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:39,660 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:39,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:39,667 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:39,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:39,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:39,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:39,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:39,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:39,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:39,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708572746] [2021-02-24 00:17:39,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:39,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 00:17:39,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973039631] [2021-02-24 00:17:39,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 00:17:39,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:39,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 00:17:39,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 00:17:39,890 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2021-02-24 00:17:40,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:40,101 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-02-24 00:17:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 00:17:40,103 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-24 00:17:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:40,112 INFO L225 Difference]: With dead ends: 45 [2021-02-24 00:17:40,112 INFO L226 Difference]: Without dead ends: 27 [2021-02-24 00:17:40,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:17:40,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-24 00:17:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-02-24 00:17:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-24 00:17:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-02-24 00:17:40,168 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 19 [2021-02-24 00:17:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:40,169 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-02-24 00:17:40,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 00:17:40,169 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-02-24 00:17:40,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-24 00:17:40,170 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:40,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:17:40,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:17:40,171 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:40,172 INFO L82 PathProgramCache]: Analyzing trace with hash -567626551, now seen corresponding path program 1 times [2021-02-24 00:17:40,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:40,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640826164] [2021-02-24 00:17:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:40,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:40,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:40,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:40,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:40,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:40,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:40,254 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:17:40,256 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:17:40,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:40,292 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:40,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:40,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:40,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:40,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640826164] [2021-02-24 00:17:40,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:17:40,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-02-24 00:17:40,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69101549] [2021-02-24 00:17:40,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:17:40,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:40,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:17:40,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:17:40,347 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 6 states. [2021-02-24 00:17:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:40,622 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-02-24 00:17:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 00:17:40,623 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-24 00:17:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:40,625 INFO L225 Difference]: With dead ends: 37 [2021-02-24 00:17:40,625 INFO L226 Difference]: Without dead ends: 32 [2021-02-24 00:17:40,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:17:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-02-24 00:17:40,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-02-24 00:17:40,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-02-24 00:17:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-02-24 00:17:40,639 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 24 [2021-02-24 00:17:40,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:40,639 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-02-24 00:17:40,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:17:40,640 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-02-24 00:17:40,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-24 00:17:40,641 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:40,641 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:17:40,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:17:40,642 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:40,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:40,643 INFO L82 PathProgramCache]: Analyzing trace with hash -137877107, now seen corresponding path program 2 times [2021-02-24 00:17:40,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:40,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33591891] [2021-02-24 00:17:40,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:40,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:40,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:40,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:40,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:40,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:40,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:40,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:40,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:40,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:40,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:40,733 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:17:40,735 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:17:40,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:40,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:40,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:40,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:40,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:40,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33591891] [2021-02-24 00:17:40,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:17:40,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-02-24 00:17:40,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960432862] [2021-02-24 00:17:40,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 00:17:40,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:40,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 00:17:40,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-24 00:17:40,814 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 8 states. [2021-02-24 00:17:41,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:41,153 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-02-24 00:17:41,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 00:17:41,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2021-02-24 00:17:41,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:41,155 INFO L225 Difference]: With dead ends: 42 [2021-02-24 00:17:41,155 INFO L226 Difference]: Without dead ends: 37 [2021-02-24 00:17:41,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-02-24 00:17:41,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-24 00:17:41,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-02-24 00:17:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-24 00:17:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-02-24 00:17:41,169 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 29 [2021-02-24 00:17:41,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:41,170 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-02-24 00:17:41,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 00:17:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-02-24 00:17:41,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-24 00:17:41,171 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:41,172 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:17:41,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:17:41,172 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:41,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:41,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1729556663, now seen corresponding path program 3 times [2021-02-24 00:17:41,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:41,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277967423] [2021-02-24 00:17:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:41,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:41,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:41,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:41,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:41,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:41,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:41,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:41,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:41,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:41,267 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:41,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:41,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:41,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:41,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:41,316 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:17:41,317 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:17:41,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:41,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:41,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:41,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:41,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:41,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277967423] [2021-02-24 00:17:41,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:17:41,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-24 00:17:41,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625176886] [2021-02-24 00:17:41,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 00:17:41,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:41,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 00:17:41,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:17:41,413 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 10 states. [2021-02-24 00:17:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:41,923 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-02-24 00:17:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-24 00:17:41,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2021-02-24 00:17:41,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:41,925 INFO L225 Difference]: With dead ends: 47 [2021-02-24 00:17:41,926 INFO L226 Difference]: Without dead ends: 42 [2021-02-24 00:17:41,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-02-24 00:17:41,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-02-24 00:17:41,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-02-24 00:17:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-24 00:17:41,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-02-24 00:17:41,940 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 34 [2021-02-24 00:17:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:41,940 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-02-24 00:17:41,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 00:17:41,941 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-02-24 00:17:41,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-24 00:17:41,942 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:41,942 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:17:41,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:17:41,942 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:41,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:41,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1302438131, now seen corresponding path program 4 times [2021-02-24 00:17:41,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:41,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136463076] [2021-02-24 00:17:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:42,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:42,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:42,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:42,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:42,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:42,087 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,088 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:42,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:42,128 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:42,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:42,159 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:17:42,160 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:17:42,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:42,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:42,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:42,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136463076] [2021-02-24 00:17:42,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:17:42,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-24 00:17:42,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723398057] [2021-02-24 00:17:42,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 00:17:42,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:42,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 00:17:42,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-02-24 00:17:42,250 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 12 states. [2021-02-24 00:17:42,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:42,908 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-02-24 00:17:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-24 00:17:42,909 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2021-02-24 00:17:42,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:42,910 INFO L225 Difference]: With dead ends: 52 [2021-02-24 00:17:42,910 INFO L226 Difference]: Without dead ends: 47 [2021-02-24 00:17:42,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-02-24 00:17:42,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-24 00:17:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-02-24 00:17:42,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-24 00:17:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-02-24 00:17:42,925 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 39 [2021-02-24 00:17:42,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:42,926 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-02-24 00:17:42,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 00:17:42,926 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-02-24 00:17:42,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-24 00:17:42,927 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:42,927 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:17:42,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 00:17:42,928 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:42,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:42,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1465403849, now seen corresponding path program 5 times [2021-02-24 00:17:42,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:42,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930907880] [2021-02-24 00:17:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:42,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:43,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:43,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:43,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:43,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:43,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:43,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:43,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:43,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:43,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:43,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:43,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:43,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:43,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:43,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:43,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:43,069 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:43,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:43,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:43,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:43,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:43,119 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:17:43,120 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:17:43,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:43,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:43,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:43,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:43,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:43,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930907880] [2021-02-24 00:17:43,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:17:43,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-02-24 00:17:43,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670564344] [2021-02-24 00:17:43,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-24 00:17:43,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:43,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-24 00:17:43,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-02-24 00:17:43,204 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 14 states. [2021-02-24 00:17:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:44,150 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-02-24 00:17:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-24 00:17:44,151 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2021-02-24 00:17:44,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:44,152 INFO L225 Difference]: With dead ends: 57 [2021-02-24 00:17:44,152 INFO L226 Difference]: Without dead ends: 52 [2021-02-24 00:17:44,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-02-24 00:17:44,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-24 00:17:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-24 00:17:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-24 00:17:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-02-24 00:17:44,169 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 44 [2021-02-24 00:17:44,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:44,169 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-02-24 00:17:44,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-24 00:17:44,169 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-02-24 00:17:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-24 00:17:44,170 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:44,171 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:17:44,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 00:17:44,171 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:44,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1959769229, now seen corresponding path program 6 times [2021-02-24 00:17:44,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:44,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125758645] [2021-02-24 00:17:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:17:44,208 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:17:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:17:44,236 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:17:44,271 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:17:44,273 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:17:44,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-24 00:17:44,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:17:44 BoogieIcfgContainer [2021-02-24 00:17:44,349 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:17:44,350 INFO L168 Benchmark]: Toolchain (without parser) took 5965.13 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 126.7 MB in the beginning and 68.3 MB in the end (delta: 58.4 MB). Peak memory consumption was 94.2 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:44,351 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:17:44,351 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.55 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:44,352 INFO L168 Benchmark]: Boogie Preprocessor took 35.93 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:44,353 INFO L168 Benchmark]: RCFGBuilder took 375.05 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 102.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:44,354 INFO L168 Benchmark]: TraceAbstraction took 5292.82 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 101.6 MB in the beginning and 68.3 MB in the end (delta: 33.3 MB). Peak memory consumption was 69.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:44,357 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 245.55 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.93 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 375.05 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 102.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5292.82 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 101.6 MB in the beginning and 68.3 MB in the end (delta: 33.3 MB). Peak memory consumption was 69.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] unsigned int x = 0; VAL [x=0] [L14] unsigned int y = 1; VAL [x=0, y=1] [L16] COND TRUE x < 6 VAL [x=0, y=1] [L17] x++ VAL [x=1, y=1] [L18] y *= 2 VAL [x=1, y=2] [L16] COND TRUE x < 6 VAL [x=1, y=2] [L17] x++ VAL [x=2, y=2] [L18] y *= 2 VAL [x=2, y=4] [L16] COND TRUE x < 6 VAL [x=2, y=4] [L17] x++ VAL [x=3, y=4] [L18] y *= 2 VAL [x=3, y=8] [L16] COND TRUE x < 6 VAL [x=3, y=8] [L17] x++ VAL [x=4, y=8] [L18] y *= 2 VAL [x=4, y=16] [L16] COND TRUE x < 6 VAL [x=4, y=16] [L17] x++ VAL [x=5, y=16] [L18] y *= 2 VAL [x=5, y=32] [L16] COND TRUE x < 6 VAL [x=5, y=32] [L17] x++ VAL [x=6, y=32] [L18] y *= 2 VAL [x=6, y=64] [L16] COND FALSE !(x < 6) VAL [x=6, y=64] [L21] CALL __VERIFIER_assert(y != 64) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.0s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 148 SDtfs, 201 SDslu, 398 SDs, 0 SdLazy, 728 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=6, 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, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 238 NumberOfCodeBlocks, 238 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 183 ConstructedInterpolants, 0 QuantifiedInterpolants, 29251 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 0/115 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 incorrect! Received shutdown request...