/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 0.2.0-7d8eed3 [2020-11-07 01:55:57,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:55:57,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:55:57,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 01:55:57,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 01:55:57,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 01:55:57,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 01:55:57,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 01:55:57,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 01:55:57,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 01:55:57,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 01:55:57,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 01:55:57,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:55:57,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:55:57,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:55:57,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:55:57,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:55:57,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:55:57,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:55:57,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:55:57,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:55:57,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:55:57,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:55:57,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:55:57,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 01:55:57,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 01:55:57,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 01:55:57,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 01:55:57,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 01:55:57,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 01:55:57,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 01:55:57,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 01:55:57,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 01:55:57,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 01:55:57,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 01:55:57,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 01:55:57,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 01:55:57,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 01:55:57,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:55:57,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:55:57,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:55:57,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 01:55:57,625 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:55:57,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:55:57,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:55:57,636 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:55:57,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:55:57,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:55:57,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:55:57,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:55:57,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:55:57,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:55:57,638 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:55:57,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:55:57,639 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:55:57,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:55:57,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:55:57,640 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:55:57,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:55:57,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:55:57,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:55:57,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:55:57,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:55:57,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:55:57,642 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:55:58,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:55:58,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:55:58,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:55:58,079 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:55:58,080 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:55:58,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-11-07 01:55:58,169 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eee18061/649830ac4a464c378d67c4df1ae177a6/FLAGd6ac80271 [2020-11-07 01:55:58,805 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:55:58,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs3f.c [2020-11-07 01:55:58,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eee18061/649830ac4a464c378d67c4df1ae177a6/FLAGd6ac80271 [2020-11-07 01:55:59,190 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eee18061/649830ac4a464c378d67c4df1ae177a6 [2020-11-07 01:55:59,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:55:59,206 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:55:59,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:55:59,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:55:59,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:55:59,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:59" (1/1) ... [2020-11-07 01:55:59,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74df7157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:59, skipping insertion in model container [2020-11-07 01:55:59,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:59" (1/1) ... [2020-11-07 01:55:59,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:55:59,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:55:59,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:55:59,427 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:55:59,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:55:59,468 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:55:59,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:59 WrapperNode [2020-11-07 01:55:59,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:55:59,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:55:59,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:55:59,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:55:59,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:59" (1/1) ... [2020-11-07 01:55:59,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:59" (1/1) ... [2020-11-07 01:55:59,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:59" (1/1) ... [2020-11-07 01:55:59,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:59" (1/1) ... [2020-11-07 01:55:59,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:59" (1/1) ... [2020-11-07 01:55:59,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:59" (1/1) ... [2020-11-07 01:55:59,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:59" (1/1) ... [2020-11-07 01:55:59,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:55:59,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:55:59,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:55:59,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:55:59,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:59" (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 [2020-11-07 01:55:59,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:55:59,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:55:59,596 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:55:59,597 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 01:55:59,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 01:55:59,597 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:55:59,597 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:55:59,597 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:55:59,598 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:55:59,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:55:59,598 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 01:55:59,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 01:55:59,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 01:55:59,599 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 01:55:59,599 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:55:59,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 01:55:59,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:55:59,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:55:59,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:55:59,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:55:59,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:55:59,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:56:00,133 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:56:00,134 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 01:56:00,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:56:00 BoogieIcfgContainer [2020-11-07 01:56:00,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:56:00,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:56:00,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:56:00,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:56:00,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:55:59" (1/3) ... [2020-11-07 01:56:00,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18534bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:56:00, skipping insertion in model container [2020-11-07 01:56:00,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:59" (2/3) ... [2020-11-07 01:56:00,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18534bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:56:00, skipping insertion in model container [2020-11-07 01:56:00,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:56:00" (3/3) ... [2020-11-07 01:56:00,146 INFO L111 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-11-07 01:56:00,163 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:56:00,166 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:56:00,180 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:56:00,205 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:56:00,205 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:56:00,205 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:56:00,206 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:56:00,206 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:56:00,206 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:56:00,206 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:56:00,206 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:56:00,223 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-11-07 01:56:00,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 01:56:00,233 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:00,234 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] [2020-11-07 01:56:00,234 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:00,241 INFO L82 PathProgramCache]: Analyzing trace with hash -341341850, now seen corresponding path program 1 times [2020-11-07 01:56:00,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:00,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809145682] [2020-11-07 01:56:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:00,332 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:00,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:00,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 01:56:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:00,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809145682] [2020-11-07 01:56:00,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:00,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 01:56:00,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456913558] [2020-11-07 01:56:00,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 01:56:00,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:00,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 01:56:00,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:56:00,638 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-11-07 01:56:00,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:00,809 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2020-11-07 01:56:00,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 01:56:00,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-11-07 01:56:00,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:00,820 INFO L225 Difference]: With dead ends: 111 [2020-11-07 01:56:00,820 INFO L226 Difference]: Without dead ends: 53 [2020-11-07 01:56:00,824 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 [2020-11-07 01:56:00,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-07 01:56:00,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-07 01:56:00,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-07 01:56:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-11-07 01:56:00,885 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 36 [2020-11-07 01:56:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:00,886 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-11-07 01:56:00,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 01:56:00,886 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-11-07 01:56:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 01:56:00,888 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:00,888 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] [2020-11-07 01:56:00,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:56:00,889 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1000671319, now seen corresponding path program 1 times [2020-11-07 01:56:00,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:00,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000798950] [2020-11-07 01:56:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:00,893 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:00,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:01,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 01:56:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:01,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000798950] [2020-11-07 01:56:01,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:01,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 01:56:01,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038211631] [2020-11-07 01:56:01,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 01:56:01,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:01,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 01:56:01,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 01:56:01,024 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 5 states. [2020-11-07 01:56:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:01,219 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-11-07 01:56:01,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 01:56:01,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-11-07 01:56:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:01,222 INFO L225 Difference]: With dead ends: 88 [2020-11-07 01:56:01,222 INFO L226 Difference]: Without dead ends: 62 [2020-11-07 01:56:01,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:56:01,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-07 01:56:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-11-07 01:56:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-07 01:56:01,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-11-07 01:56:01,238 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 36 [2020-11-07 01:56:01,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:01,238 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-11-07 01:56:01,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 01:56:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-11-07 01:56:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-07 01:56:01,240 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:01,240 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] [2020-11-07 01:56:01,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:56:01,241 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:01,242 INFO L82 PathProgramCache]: Analyzing trace with hash -546938271, now seen corresponding path program 1 times [2020-11-07 01:56:01,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:01,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184327550] [2020-11-07 01:56:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:02,794 WARN L194 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 27 [2020-11-07 01:56:02,802 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:02,804 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:02,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:03,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 01:56:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:03,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184327550] [2020-11-07 01:56:03,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:03,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 01:56:03,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414392652] [2020-11-07 01:56:03,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 01:56:03,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:03,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 01:56:03,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 01:56:03,022 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 8 states. [2020-11-07 01:56:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:03,328 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-11-07 01:56:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 01:56:03,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-11-07 01:56:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:03,331 INFO L225 Difference]: With dead ends: 73 [2020-11-07 01:56:03,331 INFO L226 Difference]: Without dead ends: 66 [2020-11-07 01:56:03,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:56:03,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-07 01:56:03,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-11-07 01:56:03,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-07 01:56:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-11-07 01:56:03,345 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 48 [2020-11-07 01:56:03,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:03,345 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-11-07 01:56:03,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 01:56:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-11-07 01:56:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-07 01:56:03,347 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:03,347 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] [2020-11-07 01:56:03,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 01:56:03,348 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:03,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:03,348 INFO L82 PathProgramCache]: Analyzing trace with hash -20855722, now seen corresponding path program 1 times [2020-11-07 01:56:03,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:03,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760376948] [2020-11-07 01:56:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:03,415 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:03,418 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:03,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:03,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 01:56:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:03,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760376948] [2020-11-07 01:56:03,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:03,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 01:56:03,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129090333] [2020-11-07 01:56:03,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 01:56:03,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:03,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 01:56:03,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-07 01:56:03,624 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 10 states. [2020-11-07 01:56:03,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:03,940 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2020-11-07 01:56:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 01:56:03,941 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-11-07 01:56:03,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:03,942 INFO L225 Difference]: With dead ends: 101 [2020-11-07 01:56:03,943 INFO L226 Difference]: Without dead ends: 71 [2020-11-07 01:56:03,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-11-07 01:56:03,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-07 01:56:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-11-07 01:56:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-07 01:56:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-11-07 01:56:03,956 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 58 [2020-11-07 01:56:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:03,956 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-11-07 01:56:03,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 01:56:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-11-07 01:56:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 01:56:03,958 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:03,959 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] [2020-11-07 01:56:03,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 01:56:03,959 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:03,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:03,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1036949453, now seen corresponding path program 2 times [2020-11-07 01:56:03,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:03,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060715992] [2020-11-07 01:56:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:04,122 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:04,124 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:04,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:04,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 01:56:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:04,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060715992] [2020-11-07 01:56:04,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:04,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 01:56:04,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685562883] [2020-11-07 01:56:04,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 01:56:04,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:04,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 01:56:04,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:56:04,321 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 6 states. [2020-11-07 01:56:04,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:04,537 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-11-07 01:56:04,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 01:56:04,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-11-07 01:56:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:04,538 INFO L225 Difference]: With dead ends: 101 [2020-11-07 01:56:04,539 INFO L226 Difference]: Without dead ends: 69 [2020-11-07 01:56:04,539 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 [2020-11-07 01:56:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-07 01:56:04,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-11-07 01:56:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-07 01:56:04,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-11-07 01:56:04,551 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2020-11-07 01:56:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:04,552 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-11-07 01:56:04,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 01:56:04,552 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-11-07 01:56:04,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 01:56:04,553 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:04,553 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] [2020-11-07 01:56:04,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 01:56:04,554 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:04,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:04,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1144764371, now seen corresponding path program 1 times [2020-11-07 01:56:04,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:04,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870801371] [2020-11-07 01:56:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:05,561 WARN L194 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-11-07 01:56:05,565 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:05,566 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 01:56:05,605 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 01:56:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 01:56:05,638 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 01:56:05,695 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 01:56:05,695 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 01:56:05,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 01:56:05,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:56:05 BoogieIcfgContainer [2020-11-07 01:56:05,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 01:56:05,716 INFO L168 Benchmark]: Toolchain (without parser) took 6515.86 ms. Allocated memory is still 163.6 MB. Free memory was 139.8 MB in the beginning and 65.0 MB in the end (delta: 74.9 MB). Peak memory consumption was 76.2 MB. Max. memory is 8.0 GB. [2020-11-07 01:56:05,717 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory was 103.2 MB in the beginning and 103.1 MB in the end (delta: 73.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 01:56:05,718 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.24 ms. Allocated memory is still 163.6 MB. Free memory was 139.1 MB in the beginning and 129.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 01:56:05,718 INFO L168 Benchmark]: Boogie Preprocessor took 37.66 ms. Allocated memory is still 163.6 MB. Free memory was 129.4 MB in the beginning and 127.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 01:56:05,719 INFO L168 Benchmark]: RCFGBuilder took 627.30 ms. Allocated memory is still 163.6 MB. Free memory was 127.8 MB in the beginning and 142.0 MB in the end (delta: -14.2 MB). Peak memory consumption was 16.1 MB. Max. memory is 8.0 GB. [2020-11-07 01:56:05,720 INFO L168 Benchmark]: TraceAbstraction took 5575.89 ms. Allocated memory is still 163.6 MB. Free memory was 141.6 MB in the beginning and 65.0 MB in the end (delta: 76.6 MB). Peak memory consumption was 77.9 MB. Max. memory is 8.0 GB. [2020-11-07 01:56:05,723 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory was 103.2 MB in the beginning and 103.1 MB in the end (delta: 73.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.24 ms. Allocated memory is still 163.6 MB. Free memory was 139.1 MB in the beginning and 129.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.66 ms. Allocated memory is still 163.6 MB. Free memory was 129.4 MB in the beginning and 127.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 627.30 ms. Allocated memory is still 163.6 MB. Free memory was 127.8 MB in the beginning and 142.0 MB in the end (delta: -14.2 MB). Peak memory consumption was 16.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5575.89 ms. Allocated memory is still 163.6 MB. Free memory was 141.6 MB in the beginning and 65.0 MB in the end (delta: 76.6 MB). Peak memory consumption was 77.9 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