/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/array-fpi/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:44:42,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:44:42,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:44:42,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 21:44:42,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 21:44:42,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 21:44:42,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 21:44:42,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 21:44:42,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 21:44:42,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 21:44:42,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 21:44:42,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 21:44:42,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:44:42,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:44:42,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:44:42,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:44:42,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:44:42,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:44:42,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:44:42,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:44:42,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:44:42,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:44:42,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:44:42,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:44:42,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:44:42,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 21:44:42,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 21:44:42,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 21:44:42,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 21:44:42,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 21:44:42,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 21:44:42,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 21:44:42,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 21:44:42,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:44:42,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:44:42,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:44:42,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:44:43,011 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:44:43,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:44:43,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:44:43,018 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:44:43,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:44:43,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:44:43,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:44:43,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:44:43,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:44:43,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:44:43,021 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:44:43,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:44:43,021 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:44:43,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:44:43,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:44:43,022 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:44:43,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:44:43,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:44:43,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:44:43,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:44:43,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:44:43,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:44:43,024 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:44:43,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:44:43,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:44:43,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:44:43,425 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:44:43,425 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:44:43,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-10-23 21:44:43,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfafd7534/fa8960e317e54173a675d513e92df932/FLAG5a70eb3ab [2020-10-23 21:44:44,179 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:44:44,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs3f.c [2020-10-23 21:44:44,189 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfafd7534/fa8960e317e54173a675d513e92df932/FLAG5a70eb3ab [2020-10-23 21:44:44,532 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfafd7534/fa8960e317e54173a675d513e92df932 [2020-10-23 21:44:44,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:44:44,545 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:44:44,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:44:44,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:44:44,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:44:44,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29916ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44, skipping insertion in model container [2020-10-23 21:44:44,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:44:44,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:44:44,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:44:44,779 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:44:44,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:44:44,826 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:44:44,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44 WrapperNode [2020-10-23 21:44:44,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:44:44,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:44:44,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:44:44,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:44:44,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:44:44,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:44:44,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:44:44,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:44:44,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (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 [2020-10-23 21:44:44,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:44:44,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:44:44,968 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:44:44,968 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 21:44:44,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:44:44,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:44:44,969 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:44:44,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:44:44,969 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:44:44,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:44:44,970 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 21:44:44,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:44:44,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 21:44:44,970 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 21:44:44,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:44:44,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 21:44:44,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:44:44,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:44:44,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:44:44,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:44:44,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:44:44,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:44:45,585 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:44:45,586 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 21:44:45,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:44:45 BoogieIcfgContainer [2020-10-23 21:44:45,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:44:45,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:44:45,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:44:45,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:44:45,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:44:44" (1/3) ... [2020-10-23 21:44:45,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a0455e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:44:45, skipping insertion in model container [2020-10-23 21:44:45,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (2/3) ... [2020-10-23 21:44:45,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a0455e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:44:45, skipping insertion in model container [2020-10-23 21:44:45,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:44:45" (3/3) ... [2020-10-23 21:44:45,602 INFO L111 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-10-23 21:44:45,616 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:44:45,622 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:44:45,642 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:44:45,679 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:44:45,680 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:44:45,680 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:44:45,680 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:44:45,680 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:44:45,680 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:44:45,681 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:44:45,681 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:44:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-10-23 21:44:45,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 21:44:45,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:45,720 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:44:45,721 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:45,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:45,731 INFO L82 PathProgramCache]: Analyzing trace with hash -341341850, now seen corresponding path program 1 times [2020-10-23 21:44:45,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:45,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569615323] [2020-10-23 21:44:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:45,846 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:46,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:46,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 21:44:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:46,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569615323] [2020-10-23 21:44:46,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:46,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:44:46,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525720190] [2020-10-23 21:44:46,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:44:46,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:46,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:44:46,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:44:46,200 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-10-23 21:44:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:46,396 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2020-10-23 21:44:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:44:46,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-10-23 21:44:46,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:46,407 INFO L225 Difference]: With dead ends: 111 [2020-10-23 21:44:46,407 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 21:44:46,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:44:46,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 21:44:46,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-23 21:44:46,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 21:44:46,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-23 21:44:46,465 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 36 [2020-10-23 21:44:46,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:46,466 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-23 21:44:46,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:44:46,467 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-23 21:44:46,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 21:44:46,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:46,468 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:44:46,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:44:46,469 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:46,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:46,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1000671319, now seen corresponding path program 1 times [2020-10-23 21:44:46,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:46,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437705815] [2020-10-23 21:44:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:46,474 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:46,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:46,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 21:44:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:46,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437705815] [2020-10-23 21:44:46,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:46,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 21:44:46,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048127014] [2020-10-23 21:44:46,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 21:44:46,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:46,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 21:44:46,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 21:44:46,669 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 5 states. [2020-10-23 21:44:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:46,929 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-23 21:44:46,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 21:44:46,930 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-10-23 21:44:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:46,932 INFO L225 Difference]: With dead ends: 88 [2020-10-23 21:44:46,932 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 21:44:46,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:44:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 21:44:46,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-10-23 21:44:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-23 21:44:46,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-23 21:44:46,953 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 36 [2020-10-23 21:44:46,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:46,953 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-23 21:44:46,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 21:44:46,953 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-23 21:44:46,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-23 21:44:46,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:46,955 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:44:46,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:44:46,956 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:46,957 INFO L82 PathProgramCache]: Analyzing trace with hash -546938271, now seen corresponding path program 1 times [2020-10-23 21:44:46,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:46,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077437650] [2020-10-23 21:44:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:47,095 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:47,097 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:47,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:47,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 21:44:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:47,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077437650] [2020-10-23 21:44:47,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:47,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:44:47,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402573509] [2020-10-23 21:44:47,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:44:47,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:47,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:44:47,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:44:47,286 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 8 states. [2020-10-23 21:44:47,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:47,736 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-10-23 21:44:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 21:44:47,737 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-10-23 21:44:47,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:47,739 INFO L225 Difference]: With dead ends: 73 [2020-10-23 21:44:47,739 INFO L226 Difference]: Without dead ends: 66 [2020-10-23 21:44:47,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:44:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-23 21:44:47,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-10-23 21:44:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-23 21:44:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-23 21:44:47,774 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 48 [2020-10-23 21:44:47,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:47,775 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-23 21:44:47,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:44:47,775 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-23 21:44:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-23 21:44:47,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:47,781 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:44:47,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:44:47,783 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:47,784 INFO L82 PathProgramCache]: Analyzing trace with hash -20855722, now seen corresponding path program 1 times [2020-10-23 21:44:47,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:47,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99840989] [2020-10-23 21:44:47,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:48,057 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:48,059 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:48,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:48,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 21:44:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:48,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99840989] [2020-10-23 21:44:48,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:48,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 21:44:48,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901207881] [2020-10-23 21:44:48,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 21:44:48,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:48,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 21:44:48,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:44:48,252 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 10 states. [2020-10-23 21:44:48,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:48,661 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2020-10-23 21:44:48,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 21:44:48,662 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-23 21:44:48,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:48,663 INFO L225 Difference]: With dead ends: 101 [2020-10-23 21:44:48,663 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 21:44:48,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-23 21:44:48,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 21:44:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-10-23 21:44:48,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-23 21:44:48,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-23 21:44:48,678 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 58 [2020-10-23 21:44:48,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:48,678 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-23 21:44:48,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 21:44:48,679 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-23 21:44:48,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-23 21:44:48,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:48,680 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:44:48,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 21:44:48,681 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:48,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:48,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1036949453, now seen corresponding path program 2 times [2020-10-23 21:44:48,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:48,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315669828] [2020-10-23 21:44:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:49,350 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:49,352 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:49,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:49,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 21:44:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:49,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315669828] [2020-10-23 21:44:49,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:49,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 21:44:49,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887478641] [2020-10-23 21:44:49,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 21:44:49,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:49,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 21:44:49,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:44:49,639 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 6 states. [2020-10-23 21:44:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:49,880 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-10-23 21:44:49,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 21:44:49,881 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-23 21:44:49,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:49,883 INFO L225 Difference]: With dead ends: 101 [2020-10-23 21:44:49,884 INFO L226 Difference]: Without dead ends: 69 [2020-10-23 21:44:49,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:44:49,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-23 21:44:49,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-23 21:44:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-23 21:44:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-23 21:44:49,897 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2020-10-23 21:44:49,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:49,897 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-23 21:44:49,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 21:44:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-23 21:44:49,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-23 21:44:49,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:49,899 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:44:49,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 21:44:49,900 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:49,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:49,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1144764371, now seen corresponding path program 1 times [2020-10-23 21:44:49,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:49,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683079479] [2020-10-23 21:44:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:50,540 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:50,544 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:44:50,635 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:44:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:44:50,695 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:44:50,744 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 21:44:50,744 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 21:44:50,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 21:44:50,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:44:50 BoogieIcfgContainer [2020-10-23 21:44:50,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 21:44:50,767 INFO L168 Benchmark]: Toolchain (without parser) took 6227.43 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.5 MB in the beginning and 154.1 MB in the end (delta: -26.6 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. [2020-10-23 21:44:50,768 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:44:50,769 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.63 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 116.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 21:44:50,770 INFO L168 Benchmark]: Boogie Preprocessor took 48.45 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 21:44:50,770 INFO L168 Benchmark]: RCFGBuilder took 711.78 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 132.1 MB in the end (delta: -17.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:44:50,772 INFO L168 Benchmark]: TraceAbstraction took 5171.83 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 132.1 MB in the beginning and 154.1 MB in the end (delta: -22.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:44:50,776 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 276.63 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 116.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.45 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 711.78 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 132.1 MB in the end (delta: -17.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5171.83 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 132.1 MB in the beginning and 154.1 MB in the end (delta: -22.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 [L31] COND TRUE i