/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_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:18:55,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:18:55,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:18:56,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:18:56,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:18:56,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:18:56,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:18:56,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:18:56,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:18:56,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:18:56,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:18:56,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:18:56,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:18:56,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:18:56,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:18:56,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:18:56,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:18:56,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:18:56,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:18:56,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:18:56,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:18:56,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:18:56,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:18:56,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:18:56,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:18:56,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:18:56,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:18:56,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:18:56,103 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 21:18:56,131 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:18:56,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:18:56,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:18:56,136 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:18:56,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:18:56,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:18:56,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:18:56,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:18:56,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:18:56,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:18:56,140 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:18:56,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:18:56,141 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:18:56,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:18:56,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:18:56,142 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:18:56,142 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:18:56,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:18:56,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:18:56,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:18:56,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:18:56,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:18:56,144 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:18:56,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:18:56,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:18:56,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:18:56,654 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:18:56,655 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:18:56,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2021-02-21 21:18:56,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c8744714/6c1e8d9025a4418790e870fd6f5eb12e/FLAGd315f33c7 [2021-02-21 21:18:57,443 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:18:57,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2021-02-21 21:18:57,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c8744714/6c1e8d9025a4418790e870fd6f5eb12e/FLAGd315f33c7 [2021-02-21 21:18:57,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c8744714/6c1e8d9025a4418790e870fd6f5eb12e [2021-02-21 21:18:57,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:18:57,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:18:57,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:18:57,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:18:57,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:18:57,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:18:57" (1/1) ... [2021-02-21 21:18:57,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40be00ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:57, skipping insertion in model container [2021-02-21 21:18:57,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:18:57" (1/1) ... [2021-02-21 21:18:57,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:18:57,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:18:58,127 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] [2021-02-21 21:18:58,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:18:58,173 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:18:58,190 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] [2021-02-21 21:18:58,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:18:58,214 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:18:58,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:58 WrapperNode [2021-02-21 21:18:58,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:18:58,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:18:58,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:18:58,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:18:58,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:58" (1/1) ... [2021-02-21 21:18:58,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:58" (1/1) ... [2021-02-21 21:18:58,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:58" (1/1) ... [2021-02-21 21:18:58,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:58" (1/1) ... [2021-02-21 21:18:58,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:58" (1/1) ... [2021-02-21 21:18:58,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:58" (1/1) ... [2021-02-21 21:18:58,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:58" (1/1) ... [2021-02-21 21:18:58,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:18:58,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:18:58,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:18:58,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:18:58,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:58" (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 21:18:58,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:18:58,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:18:58,404 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:18:58,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:18:58,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:18:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:18:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:18:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:18:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:18:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:18:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:18:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:18:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:18:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:18:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:18:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:18:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:18:58,663 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:18:58,663 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:18:58,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:18:58 BoogieIcfgContainer [2021-02-21 21:18:58,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:18:58,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:18:58,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:18:58,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:18:58,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:18:57" (1/3) ... [2021-02-21 21:18:58,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e507c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:18:58, skipping insertion in model container [2021-02-21 21:18:58,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:58" (2/3) ... [2021-02-21 21:18:58,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e507c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:18:58, skipping insertion in model container [2021-02-21 21:18:58,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:18:58" (3/3) ... [2021-02-21 21:18:58,677 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2021-02-21 21:18:58,687 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:18:58,695 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:18:58,724 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:18:58,758 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:18:58,759 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:18:58,759 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:18:58,759 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:18:58,760 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:18:58,760 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:18:58,760 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:18:58,760 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:18:58,782 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2021-02-21 21:18:58,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 21:18:58,804 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:58,805 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 21:18:58,805 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:58,825 INFO L82 PathProgramCache]: Analyzing trace with hash 645207053, now seen corresponding path program 1 times [2021-02-21 21:18:58,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:58,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336873317] [2021-02-21 21:18:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:59,020 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:59,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:59,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:59,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:59,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:59,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:59,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:59,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:59,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:59,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:59,518 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 21:18:59,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336873317] [2021-02-21 21:18:59,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:59,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:18:59,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512451797] [2021-02-21 21:18:59,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:18:59,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:59,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:18:59,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:18:59,548 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2021-02-21 21:18:59,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:59,729 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-02-21 21:18:59,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:18:59,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-21 21:18:59,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:59,740 INFO L225 Difference]: With dead ends: 45 [2021-02-21 21:18:59,741 INFO L226 Difference]: Without dead ends: 27 [2021-02-21 21:18:59,745 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 [2021-02-21 21:18:59,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-21 21:18:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-02-21 21:18:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-21 21:18:59,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-02-21 21:18:59,798 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 19 [2021-02-21 21:18:59,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:59,798 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-02-21 21:18:59,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:18:59,799 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-02-21 21:18:59,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 21:18:59,800 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:59,800 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 21:18:59,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:18:59,801 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:59,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:59,802 INFO L82 PathProgramCache]: Analyzing trace with hash -567626551, now seen corresponding path program 1 times [2021-02-21 21:18:59,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:59,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733749691] [2021-02-21 21:18:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:59,937 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:18:59,940 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:00,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:00,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:00,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:00,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:00,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:00,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:00,029 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:19:00,031 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:19:00,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:00,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:00,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:00,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:00,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:00,103 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 21:19:00,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733749691] [2021-02-21 21:19:00,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:00,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:19:00,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722756095] [2021-02-21 21:19:00,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:19:00,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:00,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:19:00,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:19:00,108 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 6 states. [2021-02-21 21:19:00,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:00,330 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-02-21 21:19:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 21:19:00,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-21 21:19:00,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:00,333 INFO L225 Difference]: With dead ends: 37 [2021-02-21 21:19:00,333 INFO L226 Difference]: Without dead ends: 32 [2021-02-21 21:19:00,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 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 21:19:00,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-02-21 21:19:00,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-02-21 21:19:00,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-02-21 21:19:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-02-21 21:19:00,348 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 24 [2021-02-21 21:19:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:00,348 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-02-21 21:19:00,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:19:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-02-21 21:19:00,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 21:19:00,350 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:00,350 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 21:19:00,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:19:00,351 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:00,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:00,352 INFO L82 PathProgramCache]: Analyzing trace with hash -137877107, now seen corresponding path program 2 times [2021-02-21 21:19:00,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:00,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281099258] [2021-02-21 21:19:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:00,559 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:19:00,563 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:00,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:00,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:00,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:00,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:00,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:00,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:00,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:00,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:00,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:00,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:00,740 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:19:00,743 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:19:00,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:00,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:00,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:00,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:00,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:00,843 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 21:19:00,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281099258] [2021-02-21 21:19:00,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:00,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 21:19:00,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466596655] [2021-02-21 21:19:00,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 21:19:00,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:00,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 21:19:00,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-21 21:19:00,849 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 8 states. [2021-02-21 21:19:01,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:01,190 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-02-21 21:19:01,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 21:19:01,191 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2021-02-21 21:19:01,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:01,195 INFO L225 Difference]: With dead ends: 42 [2021-02-21 21:19:01,196 INFO L226 Difference]: Without dead ends: 37 [2021-02-21 21:19:01,198 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 [2021-02-21 21:19:01,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-21 21:19:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-02-21 21:19:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-21 21:19:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-02-21 21:19:01,244 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 29 [2021-02-21 21:19:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:01,245 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-02-21 21:19:01,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 21:19:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-02-21 21:19:01,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-21 21:19:01,248 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:01,248 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 21:19:01,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:19:01,249 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:01,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:01,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1729556663, now seen corresponding path program 3 times [2021-02-21 21:19:01,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:01,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772434786] [2021-02-21 21:19:01,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:01,431 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:19:01,435 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:01,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:01,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:01,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:01,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:01,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:01,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:01,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:01,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:01,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:01,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:01,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:01,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:01,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:01,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:01,623 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:19:01,624 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:19:01,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:01,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:01,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:01,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:01,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:01,704 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 21:19:01,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772434786] [2021-02-21 21:19:01,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:01,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 21:19:01,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943500040] [2021-02-21 21:19:01,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 21:19:01,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:01,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 21:19:01,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:19:01,707 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 10 states. [2021-02-21 21:19:02,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:02,202 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-02-21 21:19:02,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 21:19:02,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2021-02-21 21:19:02,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:02,204 INFO L225 Difference]: With dead ends: 47 [2021-02-21 21:19:02,205 INFO L226 Difference]: Without dead ends: 42 [2021-02-21 21:19:02,205 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 [2021-02-21 21:19:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-02-21 21:19:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-02-21 21:19:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-21 21:19:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-02-21 21:19:02,217 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 34 [2021-02-21 21:19:02,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:02,218 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-02-21 21:19:02,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 21:19:02,218 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-02-21 21:19:02,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-21 21:19:02,219 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:02,220 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 21:19:02,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:19:02,220 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:02,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:02,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1302438131, now seen corresponding path program 4 times [2021-02-21 21:19:02,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:02,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882688494] [2021-02-21 21:19:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:02,423 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:19:02,424 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:02,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:02,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:02,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:02,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:02,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:02,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:02,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:02,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:02,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:02,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:02,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:02,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:02,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:02,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:02,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:02,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:02,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:02,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:02,554 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:19:02,555 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:19:02,587 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:02,588 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:02,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:02,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:02,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:02,643 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 21:19:02,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882688494] [2021-02-21 21:19:02,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:02,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 21:19:02,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615804738] [2021-02-21 21:19:02,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 21:19:02,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:02,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 21:19:02,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-02-21 21:19:02,646 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 12 states. [2021-02-21 21:19:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:03,397 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-02-21 21:19:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-21 21:19:03,398 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2021-02-21 21:19:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:03,399 INFO L225 Difference]: With dead ends: 52 [2021-02-21 21:19:03,400 INFO L226 Difference]: Without dead ends: 47 [2021-02-21 21:19:03,401 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 [2021-02-21 21:19:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-21 21:19:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-02-21 21:19:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-21 21:19:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-02-21 21:19:03,415 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 39 [2021-02-21 21:19:03,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:03,416 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-02-21 21:19:03,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 21:19:03,416 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-02-21 21:19:03,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-21 21:19:03,417 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:03,417 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 21:19:03,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:19:03,418 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1465403849, now seen corresponding path program 5 times [2021-02-21 21:19:03,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:03,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058718429] [2021-02-21 21:19:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:03,616 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-21 21:19:03,619 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:19:03,620 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:03,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:03,670 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:03,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:03,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:03,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:03,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:03,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:03,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:03,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:03,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:03,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:03,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:03,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:03,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:03,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:03,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:03,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:03,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:03,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:03,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:03,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:03,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:03,814 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:19:03,815 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:19:03,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:03,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:03,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:03,909 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:03,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:03,915 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 21:19:03,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058718429] [2021-02-21 21:19:03,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:03,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-21 21:19:03,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854545631] [2021-02-21 21:19:03,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-21 21:19:03,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:03,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-21 21:19:03,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-02-21 21:19:03,918 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 14 states. [2021-02-21 21:19:04,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:04,883 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-02-21 21:19:04,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-21 21:19:04,883 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2021-02-21 21:19:04,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:04,885 INFO L225 Difference]: With dead ends: 57 [2021-02-21 21:19:04,885 INFO L226 Difference]: Without dead ends: 52 [2021-02-21 21:19:04,886 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 [2021-02-21 21:19:04,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-21 21:19:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-21 21:19:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-21 21:19:04,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-02-21 21:19:04,905 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 44 [2021-02-21 21:19:04,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:04,905 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-02-21 21:19:04,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-21 21:19:04,906 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-02-21 21:19:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-21 21:19:04,907 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:04,907 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 21:19:04,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:19:04,908 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:04,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1959769229, now seen corresponding path program 6 times [2021-02-21 21:19:04,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:04,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776939264] [2021-02-21 21:19:04,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:05,075 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:19:05,076 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:19:05,102 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:19:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:19:05,124 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:19:05,161 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 21:19:05,161 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 21:19:05,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:19:05,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:19:05 BoogieIcfgContainer [2021-02-21 21:19:05,181 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:19:05,182 INFO L168 Benchmark]: Toolchain (without parser) took 7363.86 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 130.4 MB in the beginning and 94.9 MB in the end (delta: 35.4 MB). Peak memory consumption was 106.2 MB. Max. memory is 8.0 GB. [2021-02-21 21:19:05,183 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 155.2 MB. Free memory is still 129.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:19:05,184 INFO L168 Benchmark]: CACSL2BoogieTranslator took 375.85 ms. Allocated memory is still 155.2 MB. Free memory was 129.3 MB in the beginning and 119.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:19:05,184 INFO L168 Benchmark]: Boogie Preprocessor took 61.18 ms. Allocated memory is still 155.2 MB. Free memory was 119.9 MB in the beginning and 118.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:19:05,185 INFO L168 Benchmark]: RCFGBuilder took 383.32 ms. Allocated memory is still 155.2 MB. Free memory was 118.5 MB in the beginning and 105.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:19:05,186 INFO L168 Benchmark]: TraceAbstraction took 6513.16 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 105.1 MB in the beginning and 94.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 81.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:19:05,189 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 155.2 MB. Free memory is still 129.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 375.85 ms. Allocated memory is still 155.2 MB. Free memory was 129.3 MB in the beginning and 119.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.18 ms. Allocated memory is still 155.2 MB. Free memory was 119.9 MB in the beginning and 118.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 383.32 ms. Allocated memory is still 155.2 MB. Free memory was 118.5 MB in the beginning and 105.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6513.16 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 105.1 MB in the beginning and 94.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 81.0 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; [L14] unsigned int y = 1; [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND FALSE !(x < 6) [L21] CALL __VERIFIER_assert(y != 64) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.4s, 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: 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 incorrect! Received shutdown request...