/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/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:57:08,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:57:08,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:57:08,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 01:57:08,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:57:08,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:57:08,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:57:08,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:57:08,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:57:08,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:57:08,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:57:08,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:57:08,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:57:08,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:57:08,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:57:08,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:57:08,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 01:57:08,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:57:08,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:57:08,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:57:08,579 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 01:57:08,606 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:57:08,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:57:08,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:57:08,612 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:57:08,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:57:08,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:57:08,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:57:08,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:57:08,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:57:08,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:57:08,614 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:57:08,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:57:08,614 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:57:08,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:57:08,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:57:08,615 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:57:08,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:57:08,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:57:08,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:57:08,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:57:08,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:57:08,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:57:08,616 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:57:09,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:57:09,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:57:09,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:57:09,031 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:57:09,032 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:57:09,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2020-11-07 01:57:09,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fea108dc/b97c6c2b81b0432cafaeff093be21139/FLAG5bb1892db [2020-11-07 01:57:09,766 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:57:09,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2020-11-07 01:57:09,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fea108dc/b97c6c2b81b0432cafaeff093be21139/FLAG5bb1892db [2020-11-07 01:57:10,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fea108dc/b97c6c2b81b0432cafaeff093be21139 [2020-11-07 01:57:10,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:57:10,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:57:10,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:57:10,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:57:10,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:57:10,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:10" (1/1) ... [2020-11-07 01:57:10,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a2a0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:10, skipping insertion in model container [2020-11-07 01:57:10,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:10" (1/1) ... [2020-11-07 01:57:10,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:57:10,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:57:10,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:57:10,549 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:57:10,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:57:10,629 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:57:10,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:10 WrapperNode [2020-11-07 01:57:10,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:57:10,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:57:10,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:57:10,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:57:10,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:10" (1/1) ... [2020-11-07 01:57:10,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:10" (1/1) ... [2020-11-07 01:57:10,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:10" (1/1) ... [2020-11-07 01:57:10,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:10" (1/1) ... [2020-11-07 01:57:10,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:10" (1/1) ... [2020-11-07 01:57:10,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:10" (1/1) ... [2020-11-07 01:57:10,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:10" (1/1) ... [2020-11-07 01:57:10,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:57:10,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:57:10,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:57:10,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:57:10,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:57:10,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:57:10,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:57:10,804 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:57:10,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:57:10,804 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:57:10,804 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:57:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:57:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:57:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:57:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:57:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:57:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:57:10,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:57:10,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-11-07 01:57:10,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:57:10,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:57:11,234 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:57:11,234 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-07 01:57:11,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:11 BoogieIcfgContainer [2020-11-07 01:57:11,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:57:11,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:57:11,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:57:11,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:57:11,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:57:10" (1/3) ... [2020-11-07 01:57:11,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2480352a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:11, skipping insertion in model container [2020-11-07 01:57:11,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:10" (2/3) ... [2020-11-07 01:57:11,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2480352a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:11, skipping insertion in model container [2020-11-07 01:57:11,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:11" (3/3) ... [2020-11-07 01:57:11,256 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2020-11-07 01:57:11,275 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:57:11,280 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:57:11,295 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:57:11,333 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:57:11,333 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:57:11,333 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:57:11,335 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:57:11,336 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:57:11,336 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:57:11,336 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:57:11,336 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:57:11,366 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-11-07 01:57:11,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-07 01:57:11,390 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:11,391 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] [2020-11-07 01:57:11,391 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:11,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:11,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1977025665, now seen corresponding path program 1 times [2020-11-07 01:57:11,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:11,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483711418] [2020-11-07 01:57:11,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:11,525 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:11,826 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-11-07 01:57:11,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:11,867 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 01:57:11,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483711418] [2020-11-07 01:57:11,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:11,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 01:57:11,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361062534] [2020-11-07 01:57:11,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 01:57:11,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:11,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 01:57:11,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:57:11,895 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-11-07 01:57:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:12,170 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2020-11-07 01:57:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 01:57:12,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-11-07 01:57:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:12,184 INFO L225 Difference]: With dead ends: 107 [2020-11-07 01:57:12,184 INFO L226 Difference]: Without dead ends: 61 [2020-11-07 01:57:12,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:57:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-07 01:57:12,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2020-11-07 01:57:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-07 01:57:12,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-11-07 01:57:12,246 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 26 [2020-11-07 01:57:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:12,247 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-11-07 01:57:12,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 01:57:12,247 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-11-07 01:57:12,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-07 01:57:12,248 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:12,249 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] [2020-11-07 01:57:12,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:57:12,249 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:12,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:12,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1975744652, now seen corresponding path program 1 times [2020-11-07 01:57:12,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:12,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509813154] [2020-11-07 01:57:12,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:12,255 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:12,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:12,431 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 01:57:12,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509813154] [2020-11-07 01:57:12,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:12,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 01:57:12,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747045775] [2020-11-07 01:57:12,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 01:57:12,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:12,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 01:57:12,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 01:57:12,436 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 4 states. [2020-11-07 01:57:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:12,691 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2020-11-07 01:57:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 01:57:12,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-07 01:57:12,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:12,694 INFO L225 Difference]: With dead ends: 94 [2020-11-07 01:57:12,695 INFO L226 Difference]: Without dead ends: 90 [2020-11-07 01:57:12,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 01:57:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-07 01:57:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2020-11-07 01:57:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-07 01:57:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-11-07 01:57:12,711 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 26 [2020-11-07 01:57:12,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:12,711 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-11-07 01:57:12,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 01:57:12,712 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-11-07 01:57:12,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 01:57:12,713 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:12,713 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] [2020-11-07 01:57:12,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:57:12,714 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:12,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:12,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1044572084, now seen corresponding path program 1 times [2020-11-07 01:57:12,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:12,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965276601] [2020-11-07 01:57:12,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:12,738 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:12,741 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:12,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:12,855 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 01:57:12,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965276601] [2020-11-07 01:57:12,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:12,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 01:57:12,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603450317] [2020-11-07 01:57:12,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 01:57:12,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 01:57:12,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 01:57:12,859 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 4 states. [2020-11-07 01:57:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:13,080 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2020-11-07 01:57:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 01:57:13,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-11-07 01:57:13,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:13,082 INFO L225 Difference]: With dead ends: 106 [2020-11-07 01:57:13,082 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 01:57:13,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 01:57:13,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 01:57:13,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 47. [2020-11-07 01:57:13,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-07 01:57:13,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-11-07 01:57:13,095 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 32 [2020-11-07 01:57:13,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:13,095 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-11-07 01:57:13,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 01:57:13,096 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-11-07 01:57:13,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-07 01:57:13,097 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:13,097 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] [2020-11-07 01:57:13,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 01:57:13,098 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:13,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2007761789, now seen corresponding path program 1 times [2020-11-07 01:57:13,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:13,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395738089] [2020-11-07 01:57:13,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:13,106 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:13,113 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:13,115 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:13,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:13,235 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 01:57:13,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395738089] [2020-11-07 01:57:13,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:13,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 01:57:13,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528461481] [2020-11-07 01:57:13,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 01:57:13,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:13,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 01:57:13,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 01:57:13,239 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 4 states. [2020-11-07 01:57:13,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:13,402 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-11-07 01:57:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 01:57:13,403 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-11-07 01:57:13,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:13,404 INFO L225 Difference]: With dead ends: 86 [2020-11-07 01:57:13,404 INFO L226 Difference]: Without dead ends: 62 [2020-11-07 01:57:13,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 01:57:13,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-07 01:57:13,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2020-11-07 01:57:13,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-07 01:57:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-11-07 01:57:13,415 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 38 [2020-11-07 01:57:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:13,415 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-11-07 01:57:13,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 01:57:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-11-07 01:57:13,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 01:57:13,417 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:13,417 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] [2020-11-07 01:57:13,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 01:57:13,418 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1905643360, now seen corresponding path program 1 times [2020-11-07 01:57:13,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:13,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672525062] [2020-11-07 01:57:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:13,494 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 2, 2, 1] term [2020-11-07 01:57:13,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-07 01:57:13,499 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 2, 2, 1] term [2020-11-07 01:57:13,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-07 01:57:27,121 WARN L194 SmtUtils]: Spent 13.61 s on a formula simplification. DAG size of input: 153 DAG size of output: 91