/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:19:08,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:19:08,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:19:08,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:19:08,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:19:08,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:19:08,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:19:08,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:19:08,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:19:08,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:19:08,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:19:08,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:19:08,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:19:08,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:19:08,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:19:08,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:19:08,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:19:08,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:19:08,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:19:08,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:19:08,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:19:08,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:19:08,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:19:08,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:19:08,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:19:08,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:19:08,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:19:08,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:19:08,243 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:19:08,256 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:19:08,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:19:08,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:19:08,258 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:19:08,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:19:08,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:19:08,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:19:08,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:19:08,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:19:08,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:19:08,260 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:19:08,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:19:08,260 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:19:08,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:19:08,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:19:08,261 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:19:08,261 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:19:08,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:19:08,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:19:08,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:19:08,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:19:08,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:19:08,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:19:08,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:19:08,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:19:08,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:19:08,707 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:19:08,711 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:19:08,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2021-02-21 21:19:08,805 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4397fd48/c9c8fac767d647b19788bfed155a5e2d/FLAG3b3307336 [2021-02-21 21:19:09,510 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:19:09,511 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2021-02-21 21:19:09,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4397fd48/c9c8fac767d647b19788bfed155a5e2d/FLAG3b3307336 [2021-02-21 21:19:09,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4397fd48/c9c8fac767d647b19788bfed155a5e2d [2021-02-21 21:19:09,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:19:09,909 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:19:09,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:19:09,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:19:09,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:19:09,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:19:09" (1/1) ... [2021-02-21 21:19:09,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be695c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:09, skipping insertion in model container [2021-02-21 21:19:09,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:19:09" (1/1) ... [2021-02-21 21:19:09,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:19:09,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:19:10,149 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_2-2.c[327,340] [2021-02-21 21:19:10,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:19:10,185 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:19:10,197 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_2-2.c[327,340] [2021-02-21 21:19:10,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:19:10,215 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:19:10,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:10 WrapperNode [2021-02-21 21:19:10,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:19:10,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:19:10,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:19:10,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:19:10,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:10" (1/1) ... [2021-02-21 21:19:10,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:10" (1/1) ... [2021-02-21 21:19:10,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:10" (1/1) ... [2021-02-21 21:19:10,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:10" (1/1) ... [2021-02-21 21:19:10,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:10" (1/1) ... [2021-02-21 21:19:10,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:10" (1/1) ... [2021-02-21 21:19:10,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:10" (1/1) ... [2021-02-21 21:19:10,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:19:10,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:19:10,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:19:10,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:19:10,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:10" (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 [2021-02-21 21:19:10,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:19:10,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:19:10,375 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:19:10,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:19:10,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:19:10,376 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:19:10,376 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:19:10,376 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:19:10,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:19:10,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:19:10,377 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:19:10,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:19:10,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:19:10,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:19:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:19:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:19:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:19:10,606 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:19:10,607 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:19:10,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:19:10 BoogieIcfgContainer [2021-02-21 21:19:10,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:19:10,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:19:10,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:19:10,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:19:10,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:19:09" (1/3) ... [2021-02-21 21:19:10,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b45f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:19:10, skipping insertion in model container [2021-02-21 21:19:10,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:10" (2/3) ... [2021-02-21 21:19:10,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b45f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:19:10, skipping insertion in model container [2021-02-21 21:19:10,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:19:10" (3/3) ... [2021-02-21 21:19:10,625 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2021-02-21 21:19:10,635 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:19:10,642 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:19:10,668 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:19:10,700 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:19:10,700 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:19:10,700 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:19:10,701 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:19:10,701 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:19:10,701 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:19:10,701 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:19:10,701 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:19:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2021-02-21 21:19:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 21:19:10,730 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:10,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:19:10,731 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash 645207053, now seen corresponding path program 1 times [2021-02-21 21:19:10,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:10,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845579088] [2021-02-21 21:19:10,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:10,876 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:11,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:11,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:11,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:11,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:11,099 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-02-21 21:19:11,103 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size 38 [2021-02-21 21:19:11,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:11,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:11,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:11,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:11,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:19:11,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845579088] [2021-02-21 21:19:11,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:11,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:19:11,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457169667] [2021-02-21 21:19:11,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:19:11,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:11,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:19:11,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:19:11,275 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2021-02-21 21:19:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:11,454 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-02-21 21:19:11,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:19:11,456 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-21 21:19:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:11,466 INFO L225 Difference]: With dead ends: 45 [2021-02-21 21:19:11,466 INFO L226 Difference]: Without dead ends: 27 [2021-02-21 21:19:11,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:19:11,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-21 21:19:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-02-21 21:19:11,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-21 21:19:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-02-21 21:19:11,534 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 19 [2021-02-21 21:19:11,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:11,534 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-02-21 21:19:11,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:19:11,535 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-02-21 21:19:11,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 21:19:11,536 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:11,537 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] [2021-02-21 21:19:11,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:19:11,537 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:11,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:11,539 INFO L82 PathProgramCache]: Analyzing trace with hash -567626551, now seen corresponding path program 1 times [2021-02-21 21:19:11,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:11,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150990147] [2021-02-21 21:19:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:11,668 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-21 21:19:11,690 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:19:11,693 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:11,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:11,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:11,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:11,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:11,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:11,820 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:11,831 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:19:11,833 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:19:11,858 WARN L141 QuantifierPusher]: treesize reduction 21, result has 4.5 percent of original size [2021-02-21 21:19:11,860 WARN L147 QuantifierPusher]: treesize reduction 21, result has 4.5 percent of original size 1 [2021-02-21 21:19:11,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:11,861 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:11,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:11,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:11,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:19:11,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150990147] [2021-02-21 21:19:11,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:11,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:19:11,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997623177] [2021-02-21 21:19:11,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:19:11,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:11,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:19:11,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:19:11,920 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 6 states. [2021-02-21 21:19:12,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:12,206 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-02-21 21:19:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 21:19:12,207 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-21 21:19:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:12,212 INFO L225 Difference]: With dead ends: 37 [2021-02-21 21:19:12,212 INFO L226 Difference]: Without dead ends: 32 [2021-02-21 21:19:12,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:19:12,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-02-21 21:19:12,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-02-21 21:19:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-02-21 21:19:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-02-21 21:19:12,244 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 24 [2021-02-21 21:19:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:12,245 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-02-21 21:19:12,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:19:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-02-21 21:19:12,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 21:19:12,253 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:12,254 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] [2021-02-21 21:19:12,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:19:12,255 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:12,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:12,256 INFO L82 PathProgramCache]: Analyzing trace with hash -137877107, now seen corresponding path program 2 times [2021-02-21 21:19:12,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:12,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409088041] [2021-02-21 21:19:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:12,479 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:19:12,484 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:12,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:12,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:12,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:12,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:12,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:12,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:12,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:12,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:12,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:12,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:12,649 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:19:12,651 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:19:12,680 WARN L141 QuantifierPusher]: treesize reduction 21, result has 4.5 percent of original size [2021-02-21 21:19:12,681 WARN L147 QuantifierPusher]: treesize reduction 21, result has 4.5 percent of original size 1 [2021-02-21 21:19:12,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:12,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:12,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:12,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:12,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:19:12,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409088041] [2021-02-21 21:19:12,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:12,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 21:19:12,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797412147] [2021-02-21 21:19:12,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 21:19:12,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:12,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 21:19:12,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-21 21:19:12,749 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 8 states. [2021-02-21 21:19:13,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:13,100 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-02-21 21:19:13,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 21:19:13,101 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2021-02-21 21:19:13,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:13,102 INFO L225 Difference]: With dead ends: 42 [2021-02-21 21:19:13,102 INFO L226 Difference]: Without dead ends: 37 [2021-02-21 21:19:13,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-02-21 21:19:13,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-21 21:19:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-02-21 21:19:13,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-21 21:19:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-02-21 21:19:13,116 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 29 [2021-02-21 21:19:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:13,116 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-02-21 21:19:13,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 21:19:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-02-21 21:19:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-21 21:19:13,118 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:13,118 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] [2021-02-21 21:19:13,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:19:13,119 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:13,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1729556663, now seen corresponding path program 3 times [2021-02-21 21:19:13,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:13,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466782800] [2021-02-21 21:19:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:13,300 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:19:13,302 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:13,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:13,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:13,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:13,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:13,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:13,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:13,367 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:13,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:13,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:13,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:13,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:13,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:13,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:13,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:13,425 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:19:13,427 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:19:13,456 WARN L141 QuantifierPusher]: treesize reduction 21, result has 4.5 percent of original size [2021-02-21 21:19:13,457 WARN L147 QuantifierPusher]: treesize reduction 21, result has 4.5 percent of original size 1 [2021-02-21 21:19:13,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:13,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:13,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:13,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:13,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:19:13,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466782800] [2021-02-21 21:19:13,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:13,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 21:19:13,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675205765] [2021-02-21 21:19:13,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 21:19:13,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:13,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 21:19:13,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:19:13,507 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 10 states. [2021-02-21 21:19:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:13,937 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-02-21 21:19:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 21:19:13,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2021-02-21 21:19:13,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:13,939 INFO L225 Difference]: With dead ends: 47 [2021-02-21 21:19:13,939 INFO L226 Difference]: Without dead ends: 42 [2021-02-21 21:19:13,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-02-21 21:19:13,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-02-21 21:19:13,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-02-21 21:19:13,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-21 21:19:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-02-21 21:19:13,953 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 34 [2021-02-21 21:19:13,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:13,953 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-02-21 21:19:13,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 21:19:13,954 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-02-21 21:19:13,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-21 21:19:13,955 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:13,955 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] [2021-02-21 21:19:13,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:19:13,955 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:13,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:13,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1302438131, now seen corresponding path program 4 times [2021-02-21 21:19:13,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:13,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378109968] [2021-02-21 21:19:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:14,127 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:19:14,128 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:14,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:14,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:14,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:14,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:14,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:14,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:14,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:14,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:14,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:14,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:14,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:14,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:14,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:14,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:14,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:14,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:14,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:14,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:14,258 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:19:14,259 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:19:14,287 WARN L141 QuantifierPusher]: treesize reduction 21, result has 4.5 percent of original size [2021-02-21 21:19:14,289 WARN L147 QuantifierPusher]: treesize reduction 21, result has 4.5 percent of original size 1 [2021-02-21 21:19:14,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:14,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:14,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:14,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:14,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:19:14,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378109968] [2021-02-21 21:19:14,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:14,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 21:19:14,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470335091] [2021-02-21 21:19:14,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 21:19:14,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:14,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 21:19:14,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-02-21 21:19:14,337 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 12 states. [2021-02-21 21:19:14,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:14,876 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-02-21 21:19:14,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-21 21:19:14,876 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2021-02-21 21:19:14,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:14,877 INFO L225 Difference]: With dead ends: 52 [2021-02-21 21:19:14,878 INFO L226 Difference]: Without dead ends: 47 [2021-02-21 21:19:14,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-02-21 21:19:14,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-21 21:19:14,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-02-21 21:19:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-21 21:19:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-02-21 21:19:14,892 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 39 [2021-02-21 21:19:14,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:14,892 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-02-21 21:19:14,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 21:19:14,892 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-02-21 21:19:14,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-21 21:19:14,894 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:14,894 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] [2021-02-21 21:19:14,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:19:14,895 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:14,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:14,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1465403849, now seen corresponding path program 5 times [2021-02-21 21:19:14,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:14,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125444106] [2021-02-21 21:19:14,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:15,051 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:19:15,052 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:15,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:15,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:15,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:15,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:15,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:15,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:15,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:15,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:15,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:15,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:15,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:15,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:15,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:15,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:15,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:15,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:15,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:15,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:15,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:15,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:15,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:15,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:15,239 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:19:15,240 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:19:15,270 WARN L141 QuantifierPusher]: treesize reduction 21, result has 4.5 percent of original size [2021-02-21 21:19:15,272 WARN L147 QuantifierPusher]: treesize reduction 21, result has 4.5 percent of original size 1 [2021-02-21 21:19:15,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:15,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:15,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:15,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:15,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:19:15,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125444106] [2021-02-21 21:19:15,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:15,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-21 21:19:15,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453196545] [2021-02-21 21:19:15,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-21 21:19:15,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:15,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-21 21:19:15,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-02-21 21:19:15,324 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 14 states. [2021-02-21 21:19:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:16,157 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-02-21 21:19:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-21 21:19:16,158 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2021-02-21 21:19:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:16,159 INFO L225 Difference]: With dead ends: 57 [2021-02-21 21:19:16,159 INFO L226 Difference]: Without dead ends: 52 [2021-02-21 21:19:16,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-02-21 21:19:16,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-21 21:19:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-21 21:19:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-21 21:19:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-02-21 21:19:16,178 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 44 [2021-02-21 21:19:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:16,178 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-02-21 21:19:16,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-21 21:19:16,179 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-02-21 21:19:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-21 21:19:16,180 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:16,180 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] [2021-02-21 21:19:16,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:19:16,180 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:16,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:16,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1959769229, now seen corresponding path program 6 times [2021-02-21 21:19:16,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:16,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164215013] [2021-02-21 21:19:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:16,355 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:19:16,357 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:16,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:16,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:16,417 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:16,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:16,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:16,437 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:16,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:16,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:16,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:16,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:16,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:16,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:16,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:16,554 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.0 percent of original size [2021-02-21 21:19:16,555 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.0 percent of original size 32 [2021-02-21 21:19:16,592 WARN L141 QuantifierPusher]: treesize reduction 19, result has 67.2 percent of original size [2021-02-21 21:19:16,594 WARN L147 QuantifierPusher]: treesize reduction 19, result has 67.2 percent of original size 39 [2021-02-21 21:19:16,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,640 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:19:16,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,655 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:19:16,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:16,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:16,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:16,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:19:16,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164215013] [2021-02-21 21:19:16,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:16,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-21 21:19:16,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921829924] [2021-02-21 21:19:16,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-21 21:19:16,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:16,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-21 21:19:16,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-02-21 21:19:16,734 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 19 states. [2021-02-21 21:19:17,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:17,914 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-02-21 21:19:17,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-21 21:19:17,915 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2021-02-21 21:19:17,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:17,916 INFO L225 Difference]: With dead ends: 58 [2021-02-21 21:19:17,916 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 21:19:17,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-02-21 21:19:17,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 21:19:17,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 21:19:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 21:19:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 21:19:17,918 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2021-02-21 21:19:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:17,919 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 21:19:17,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-21 21:19:17,919 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 21:19:17,919 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 21:19:17,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:19:17,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 21:19:18,202 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2021-02-21 21:19:18,439 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 22 [2021-02-21 21:19:18,623 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-02-21 21:19:18,844 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-02-21 21:19:19,008 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-21 21:19:19,123 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2021-02-21 21:19:19,151 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 21:19:19,151 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 21:19:19,151 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 21:19:19,152 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-21 21:19:19,152 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-21 21:19:19,152 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:19:19,152 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-21 21:19:19,152 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-21 21:19:19,153 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-21 21:19:19,153 INFO L185 CegarLoopUtils]: 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|)) [2021-02-21 21:19:19,153 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-21 21:19:19,153 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-21 21:19:19,154 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:19:19,154 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:19:19,154 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:19:19,154 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 21:19:19,154 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-21 21:19:19,154 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 12 22) the Hoare annotation is: true [2021-02-21 21:19:19,154 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 12 22) the Hoare annotation is: true [2021-02-21 21:19:19,154 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (or (let ((.cse1 (div main_~x~0 4294967296))) (let ((.cse0 (* 4294967296 .cse1))) (and (< (+ .cse0 5) main_~x~0) (< 0 (+ .cse1 1)) (<= main_~x~0 (+ .cse0 6))))) (and (<= 4 main_~x~0) (<= main_~x~0 4)) (and (<= 2 main_~x~0) (<= main_~x~0 2)) (and (<= 1 main_~x~0) (<= main_~x~0 1)) (and (<= main_~x~0 3) (<= 3 main_~x~0)) (and (<= main_~x~0 5) (<= 5 main_~x~0))) [2021-02-21 21:19:19,155 INFO L185 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: (or (and (<= 4 main_~x~0) (<= main_~x~0 4)) (and (<= 2 main_~x~0) (<= main_~x~0 2)) (and (<= 1 main_~x~0) (<= main_~x~0 1)) (and (<= main_~x~0 3) (<= 3 main_~x~0)) (and (<= main_~x~0 5) (<= 5 main_~x~0)) (= main_~x~0 0)) [2021-02-21 21:19:19,155 INFO L185 CegarLoopUtils]: At program point L17-1(line 17) the Hoare annotation is: (or (and (<= |main_#t~post7| 1) (<= 1 main_~x~0) (<= 1 |main_#t~post7|) (<= main_~x~0 1)) (and (<= main_~x~0 5) (<= |main_#t~post7| 5) (<= 5 main_~x~0) (<= 5 |main_#t~post7|)) (and (<= 2 main_~x~0) (<= main_~x~0 2) (<= 2 |main_#t~post7|) (<= |main_#t~post7| 2)) (and (<= |main_#t~post7| 3) (<= main_~x~0 3) (<= 3 |main_#t~post7|) (<= 3 main_~x~0)) (and (<= 4 |main_#t~post7|) (<= 4 main_~x~0) (<= |main_#t~post7| 4) (<= main_~x~0 4)) (and (= |main_#t~post7| 0) (= main_~x~0 0))) [2021-02-21 21:19:19,155 INFO L185 CegarLoopUtils]: At program point L17-2(line 17) the Hoare annotation is: (or (and (<= |main_#t~post7| 1) (<= 2 main_~x~0) (<= 1 |main_#t~post7|) (<= main_~x~0 2)) (and (<= main_~x~0 3) (<= 3 main_~x~0) (<= 2 |main_#t~post7|) (<= |main_#t~post7| 2)) (and (<= 1 main_~x~0) (= |main_#t~post7| 0) (<= main_~x~0 1)) (and (<= 4 main_~x~0) (<= |main_#t~post7| 3) (<= 3 |main_#t~post7|) (<= main_~x~0 4)) (let ((.cse1 (div main_~x~0 4294967296))) (let ((.cse0 (* 4294967296 .cse1))) (and (< (+ .cse0 5) main_~x~0) (< 0 (+ .cse1 1)) (<= |main_#t~post7| 5) (<= main_~x~0 (+ .cse0 6)) (<= 5 |main_#t~post7|)))) (and (<= 4 |main_#t~post7|) (<= |main_#t~post7| 4) (<= main_~x~0 5) (<= 5 main_~x~0))) [2021-02-21 21:19:19,155 INFO L185 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: (= main_~x~0 0) [2021-02-21 21:19:19,155 INFO L185 CegarLoopUtils]: At program point L16-2(lines 16 19) the Hoare annotation is: (let ((.cse2 (div main_~x~0 4294967296))) (let ((.cse1 (< 0 (+ .cse2 1)))) (or (let ((.cse0 (* 4294967296 .cse2))) (and (< (+ .cse0 5) main_~x~0) .cse1 (<= main_~x~0 (+ .cse0 6)))) (and (<= main_~x~0 5) (<= 5 main_~x~0)) (and .cse1 (<= main_~x~0 4))))) [2021-02-21 21:19:19,156 INFO L185 CegarLoopUtils]: At program point L16-3(lines 16 19) the Hoare annotation is: (let ((.cse1 (div main_~x~0 4294967296))) (let ((.cse0 (* 4294967296 .cse1))) (and (< (+ .cse0 5) main_~x~0) (< 0 (+ .cse1 1)) (<= main_~x~0 (+ .cse0 6))))) [2021-02-21 21:19:19,156 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 12 22) the Hoare annotation is: true [2021-02-21 21:19:19,156 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-02-21 21:19:19,156 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2021-02-21 21:19:19,156 INFO L185 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:19:19,156 INFO L185 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-21 21:19:19,156 INFO L185 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:19:19,156 INFO L192 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-02-21 21:19:19,157 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:19:19,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:19:19 BoogieIcfgContainer [2021-02-21 21:19:19,178 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:19:19,180 INFO L168 Benchmark]: Toolchain (without parser) took 9284.19 ms. Allocated memory was 157.3 MB in the beginning and 232.8 MB in the end (delta: 75.5 MB). Free memory was 133.8 MB in the beginning and 99.3 MB in the end (delta: 34.5 MB). Peak memory consumption was 128.8 MB. Max. memory is 8.0 GB. [2021-02-21 21:19:19,180 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 157.3 MB. Free memory was 131.3 MB in the beginning and 131.2 MB in the end (delta: 77.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:19:19,181 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.56 ms. Allocated memory is still 157.3 MB. Free memory was 132.7 MB in the beginning and 123.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:19:19,182 INFO L168 Benchmark]: Boogie Preprocessor took 40.67 ms. Allocated memory is still 157.3 MB. Free memory was 123.5 MB in the beginning and 122.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:19:19,182 INFO L168 Benchmark]: RCFGBuilder took 351.71 ms. Allocated memory is still 157.3 MB. Free memory was 121.9 MB in the beginning and 108.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:19:19,183 INFO L168 Benchmark]: TraceAbstraction took 8564.95 ms. Allocated memory was 157.3 MB in the beginning and 232.8 MB in the end (delta: 75.5 MB). Free memory was 107.9 MB in the beginning and 99.3 MB in the end (delta: 8.5 MB). Peak memory consumption was 102.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:19:19,186 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 157.3 MB. Free memory was 131.3 MB in the beginning and 131.2 MB in the end (delta: 77.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 302.56 ms. Allocated memory is still 157.3 MB. Free memory was 132.7 MB in the beginning and 123.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.67 ms. Allocated memory is still 157.3 MB. Free memory was 123.5 MB in the beginning and 122.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 351.71 ms. Allocated memory is still 157.3 MB. Free memory was 121.9 MB in the beginning and 108.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8564.95 ms. Allocated memory was 157.3 MB in the beginning and 232.8 MB in the end (delta: 75.5 MB). Free memory was 107.9 MB in the beginning and 99.3 MB in the end (delta: 8.5 MB). Peak memory consumption was 102.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (((4294967296 * (x / 4294967296) + 5 < x && 0 < x / 4294967296 + 1) && x <= 4294967296 * (x / 4294967296) + 6) || (x <= 5 && 5 <= x)) || (0 < x / 4294967296 + 1 && x <= 4) - ProcedureContractResult [Line: 12]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.2s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 175 SDtfs, 250 SDslu, 543 SDs, 0 SdLazy, 1214 SolverSat, 79 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 3.2s 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, 7 MinimizatonAttempts, 12 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 80 PreInvPairs, 130 NumberOfFragments, 410 HoareAnnotationTreeSize, 80 FomulaSimplifications, 16638 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 31 FomulaSimplificationsInter, 1349 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...