/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-crafted-1/sumt9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:13:14,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:13:14,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:13:14,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 02:13:14,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:13:14,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:13:14,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:13:14,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:13:14,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:13:14,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:13:14,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:13:14,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:13:14,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:13:14,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:13:14,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:13:14,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:13:14,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 02:13:14,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:13:14,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:13:14,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:13:14,576 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 02:13:14,598 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:13:14,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:13:14,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:13:14,603 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:13:14,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:13:14,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:13:14,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:13:14,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:13:14,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:13:14,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:13:14,606 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:13:14,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:13:14,606 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:13:14,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:13:14,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:13:14,607 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:13:14,607 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:13:14,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:13:14,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:13:14,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:13:14,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:13:14,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:13:14,609 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:13:15,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:13:15,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:13:15,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:13:15,079 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:13:15,080 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:13:15,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-11-07 02:13:15,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0a7d3b31/6106e352365642729b0ab80250e44692/FLAG0290e1d8b [2020-11-07 02:13:15,777 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:13:15,778 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-11-07 02:13:15,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0a7d3b31/6106e352365642729b0ab80250e44692/FLAG0290e1d8b [2020-11-07 02:13:16,160 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0a7d3b31/6106e352365642729b0ab80250e44692 [2020-11-07 02:13:16,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:13:16,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:13:16,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:13:16,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:13:16,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:13:16,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:16" (1/1) ... [2020-11-07 02:13:16,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4769f613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:16, skipping insertion in model container [2020-11-07 02:13:16,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:16" (1/1) ... [2020-11-07 02:13:16,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:13:16,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:13:16,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:13:16,449 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:13:16,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:13:16,493 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:13:16,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:16 WrapperNode [2020-11-07 02:13:16,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:13:16,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:13:16,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:13:16,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:13:16,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:16" (1/1) ... [2020-11-07 02:13:16,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:16" (1/1) ... [2020-11-07 02:13:16,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:16" (1/1) ... [2020-11-07 02:13:16,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:16" (1/1) ... [2020-11-07 02:13:16,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:16" (1/1) ... [2020-11-07 02:13:16,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:16" (1/1) ... [2020-11-07 02:13:16,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:16" (1/1) ... [2020-11-07 02:13:16,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:13:16,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:13:16,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:13:16,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:13:16,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:16" (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 02:13:16,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:13:16,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:13:16,627 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:13:16,627 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:13:16,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 02:13:16,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:13:16,628 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:13:16,628 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:13:16,628 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:13:16,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:13:16,629 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:13:16,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:13:16,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 02:13:16,629 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:13:16,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:13:16,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:13:16,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:13:16,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:13:16,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:13:16,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:13:17,193 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:13:17,193 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 02:13:17,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:13:17 BoogieIcfgContainer [2020-11-07 02:13:17,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:13:17,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:13:17,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:13:17,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:13:17,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:13:16" (1/3) ... [2020-11-07 02:13:17,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6341b705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:13:17, skipping insertion in model container [2020-11-07 02:13:17,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:16" (2/3) ... [2020-11-07 02:13:17,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6341b705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:13:17, skipping insertion in model container [2020-11-07 02:13:17,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:13:17" (3/3) ... [2020-11-07 02:13:17,209 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt9.c [2020-11-07 02:13:17,222 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:13:17,225 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:13:17,235 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:13:17,257 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:13:17,257 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:13:17,257 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:13:17,258 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:13:17,258 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:13:17,258 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:13:17,258 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:13:17,258 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:13:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-11-07 02:13:17,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 02:13:17,284 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:17,285 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] [2020-11-07 02:13:17,285 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:17,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:17,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1798983212, now seen corresponding path program 1 times [2020-11-07 02:13:17,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:17,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861714655] [2020-11-07 02:13:17,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:17,377 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:18,787 WARN L194 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-11-07 02:13:18,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:19,027 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 02:13:19,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861714655] [2020-11-07 02:13:19,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:19,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 02:13:19,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806740206] [2020-11-07 02:13:19,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 02:13:19,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:19,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 02:13:19,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-11-07 02:13:19,064 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 17 states. [2020-11-07 02:13:20,186 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 02:13:20,464 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-11-07 02:13:20,629 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-07 02:13:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:21,873 INFO L93 Difference]: Finished difference Result 198 states and 272 transitions. [2020-11-07 02:13:21,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 02:13:21,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-11-07 02:13:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:21,888 INFO L225 Difference]: With dead ends: 198 [2020-11-07 02:13:21,888 INFO L226 Difference]: Without dead ends: 142 [2020-11-07 02:13:21,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2020-11-07 02:13:21,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-11-07 02:13:21,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 64. [2020-11-07 02:13:21,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-07 02:13:21,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-11-07 02:13:21,970 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 37 [2020-11-07 02:13:21,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:21,971 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-11-07 02:13:21,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 02:13:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-11-07 02:13:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-07 02:13:21,973 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:21,973 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 02:13:21,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:13:21,974 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:21,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:21,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1332374799, now seen corresponding path program 1 times [2020-11-07 02:13:21,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:21,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917603301] [2020-11-07 02:13:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:48,943 WARN L194 SmtUtils]: Spent 26.96 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-07 02:15:03,526 WARN L194 SmtUtils]: Spent 1.24 m on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-11-07 02:16:16,507 WARN L194 SmtUtils]: Spent 1.21 m on a formula simplification. DAG size of input: 44892 DAG size of output: 303 [2020-11-07 02:16:16,524 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:16:16,527 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:16:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:16,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:16:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:16,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 02:16:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:16,809 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 02:16:16,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917603301] [2020-11-07 02:16:16,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:16:16,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:16:16,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311379121] [2020-11-07 02:16:16,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:16:16,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:16:16,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:16:16,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:16:16,812 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 5 states. [2020-11-07 02:16:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:16:17,593 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2020-11-07 02:16:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:16:17,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-11-07 02:16:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:16:17,596 INFO L225 Difference]: With dead ends: 109 [2020-11-07 02:16:17,596 INFO L226 Difference]: Without dead ends: 82 [2020-11-07 02:16:17,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:16:17,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-07 02:16:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2020-11-07 02:16:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-07 02:16:17,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-11-07 02:16:17,626 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 46 [2020-11-07 02:16:17,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:16:17,627 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-11-07 02:16:17,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:16:17,627 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-11-07 02:16:17,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 02:16:17,628 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:16:17,629 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] [2020-11-07 02:16:17,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:16:17,629 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:16:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:16:17,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2032386084, now seen corresponding path program 1 times [2020-11-07 02:16:17,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:16:17,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807525793] [2020-11-07 02:16:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:16:23,893 WARN L194 SmtUtils]: Spent 6.26 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-07 02:17:30,250 WARN L194 SmtUtils]: Spent 1.11 m on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-11-07 02:20:27,828 WARN L194 SmtUtils]: Spent 2.95 m on a formula simplification. DAG size of input: 44892 DAG size of output: 276 [2020-11-07 02:20:27,835 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:20:27,837 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:20:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:20:28,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:20:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:20:28,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 02:20:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:20:28,047 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 02:20:28,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807525793] [2020-11-07 02:20:28,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:20:28,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:20:28,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619007773] [2020-11-07 02:20:28,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:20:28,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:20:28,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:20:28,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:20:28,050 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 5 states. [2020-11-07 02:20:30,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:20:30,776 INFO L93 Difference]: Finished difference Result 108 states and 131 transitions. [2020-11-07 02:20:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:20:30,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-11-07 02:20:30,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:20:30,780 INFO L225 Difference]: With dead ends: 108 [2020-11-07 02:20:30,780 INFO L226 Difference]: Without dead ends: 81 [2020-11-07 02:20:30,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:20:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-07 02:20:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2020-11-07 02:20:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-07 02:20:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-11-07 02:20:30,807 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 47 [2020-11-07 02:20:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:20:30,807 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-11-07 02:20:30,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:20:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-11-07 02:20:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-07 02:20:30,809 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:20:30,809 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] [2020-11-07 02:20:30,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:20:30,810 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:20:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:20:30,811 INFO L82 PathProgramCache]: Analyzing trace with hash -4154153, now seen corresponding path program 1 times [2020-11-07 02:20:30,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:20:30,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808298979] [2020-11-07 02:20:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:20:41,214 WARN L194 SmtUtils]: Spent 10.40 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-07 02:22:14,510 WARN L194 SmtUtils]: Spent 1.55 m on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-11-07 02:22:52,259 WARN L194 SmtUtils]: Spent 37.70 s on a formula simplification. DAG size of input: 12636 DAG size of output: 251 [2020-11-07 02:22:52,263 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:22:52,265 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:22:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:22:52,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:22:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:22:52,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 02:22:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:22:52,582 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 02:22:52,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808298979] [2020-11-07 02:22:52,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:22:52,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:22:52,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861693698] [2020-11-07 02:22:52,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:22:52,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:22:52,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:22:52,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:22:52,585 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 5 states. [2020-11-07 02:22:53,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:22:53,297 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2020-11-07 02:22:53,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:22:53,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-11-07 02:22:53,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:22:53,300 INFO L225 Difference]: With dead ends: 107 [2020-11-07 02:22:53,300 INFO L226 Difference]: Without dead ends: 80 [2020-11-07 02:22:53,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:22:53,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-07 02:22:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-11-07 02:22:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-07 02:22:53,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-11-07 02:22:53,329 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 48 [2020-11-07 02:22:53,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:22:53,330 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-11-07 02:22:53,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:22:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-11-07 02:22:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-07 02:22:53,331 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:22:53,332 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] [2020-11-07 02:22:53,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:22:53,332 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:22:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:22:53,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1977304566, now seen corresponding path program 1 times [2020-11-07 02:22:53,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:22:53,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324397175] [2020-11-07 02:22:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:23:09,951 WARN L194 SmtUtils]: Spent 16.62 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-07 02:24:49,458 WARN L194 SmtUtils]: Spent 1.66 m on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-11-07 02:25:19,311 WARN L194 SmtUtils]: Spent 29.81 s on a formula simplification. DAG size of input: 4572 DAG size of output: 247 [2020-11-07 02:25:19,316 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:25:19,318 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:25:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:25:19,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:25:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:25:20,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 02:25:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:25:20,071 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 02:25:20,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324397175] [2020-11-07 02:25:20,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:25:20,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 02:25:20,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554767667] [2020-11-07 02:25:20,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 02:25:20,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:25:20,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 02:25:20,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-07 02:25:20,074 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 9 states. [2020-11-07 02:25:20,426 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-11-07 02:25:20,697 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-11-07 02:25:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:25:21,625 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2020-11-07 02:25:21,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 02:25:21,627 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-11-07 02:25:21,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:25:21,628 INFO L225 Difference]: With dead ends: 106 [2020-11-07 02:25:21,628 INFO L226 Difference]: Without dead ends: 79 [2020-11-07 02:25:21,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-11-07 02:25:21,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-07 02:25:21,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-11-07 02:25:21,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-07 02:25:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-11-07 02:25:21,655 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 49 [2020-11-07 02:25:21,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:25:21,656 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-11-07 02:25:21,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 02:25:21,656 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-11-07 02:25:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-07 02:25:21,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:25:21,658 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] [2020-11-07 02:25:21,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:25:21,658 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:25:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:25:21,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1985370435, now seen corresponding path program 1 times [2020-11-07 02:25:21,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:25:21,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043268260] [2020-11-07 02:25:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:25:46,543 WARN L194 SmtUtils]: Spent 24.88 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-07 02:26:23,882 WARN L194 SmtUtils]: Spent 37.34 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-11-07 02:26:34,072 WARN L194 SmtUtils]: Spent 10.18 s on a formula simplification. DAG size of input: 544 DAG size of output: 252 [2020-11-07 02:26:34,080 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:26:34,081 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:26:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:34,913 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-11-07 02:26:35,063 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-11-07 02:26:35,223 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2020-11-07 02:26:35,404 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-11-07 02:26:35,726 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-11-07 02:26:36,104 WARN L194 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-11-07 02:26:36,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:26:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:36,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 02:26:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:36,518 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 02:26:36,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043268260] [2020-11-07 02:26:36,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:26:36,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 02:26:36,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250139268] [2020-11-07 02:26:36,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 02:26:36,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:26:36,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 02:26:36,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2020-11-07 02:26:36,521 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 20 states. [2020-11-07 02:26:36,861 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-11-07 02:26:37,072 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-11-07 02:26:37,283 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-11-07 02:26:37,508 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-11-07 02:26:37,748 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-11-07 02:26:38,016 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-11-07 02:26:38,288 WARN L194 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-11-07 02:26:38,574 WARN L194 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 02:26:38,886 WARN L194 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-11-07 02:26:39,198 WARN L194 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-11-07 02:26:39,578 WARN L194 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-11-07 02:26:40,009 WARN L194 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-11-07 02:26:40,552 WARN L194 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2020-11-07 02:26:41,091 WARN L194 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-11-07 02:26:41,644 WARN L194 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-11-07 02:26:41,926 WARN L194 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-11-07 02:26:47,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:26:47,044 INFO L93 Difference]: Finished difference Result 168 states and 215 transitions. [2020-11-07 02:26:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 02:26:47,045 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-11-07 02:26:47,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:26:47,047 INFO L225 Difference]: With dead ends: 168 [2020-11-07 02:26:47,048 INFO L226 Difference]: Without dead ends: 141 [2020-11-07 02:26:47,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 02:26:47,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-07 02:26:47,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 70. [2020-11-07 02:26:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-07 02:26:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-11-07 02:26:47,083 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 50 [2020-11-07 02:26:47,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:26:47,084 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-11-07 02:26:47,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 02:26:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-11-07 02:26:47,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-07 02:26:47,085 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:26:47,085 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] [2020-11-07 02:26:47,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 02:26:47,086 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:26:47,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:26:47,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1205357584, now seen corresponding path program 1 times [2020-11-07 02:26:47,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:26:47,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990562610] [2020-11-07 02:26:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:27:14,015 WARN L194 SmtUtils]: Spent 26.93 s on a formula simplification that was a NOOP. DAG size: 39