/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/sumt7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:11:52,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:11:52,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:11:52,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 02:11:52,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:11:52,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:11:52,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:11:52,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:11:52,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:11:52,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:11:52,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:11:52,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:11:52,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:11:52,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:11:52,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:11:52,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:11:52,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 02:11:52,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:11:52,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:11:52,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:11:52,174 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 02:11:52,196 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:11:52,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:11:52,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:11:52,201 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:11:52,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:11:52,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:11:52,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:11:52,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:11:52,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:11:52,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:11:52,203 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:11:52,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:11:52,204 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:11:52,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:11:52,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:11:52,205 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:11:52,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:11:52,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:11:52,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:11:52,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:11:52,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:11:52,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:11:52,207 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:11:52,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:11:52,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:11:52,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:11:52,651 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:11:52,651 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:11:52,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-11-07 02:11:52,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce5eede68/fbc1948e96a54bb1adb546225589ba3a/FLAGcbf216398 [2020-11-07 02:11:53,358 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:11:53,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-11-07 02:11:53,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce5eede68/fbc1948e96a54bb1adb546225589ba3a/FLAGcbf216398 [2020-11-07 02:11:53,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce5eede68/fbc1948e96a54bb1adb546225589ba3a [2020-11-07 02:11:53,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:11:53,732 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:11:53,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:11:53,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:11:53,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:11:53,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dca2923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53, skipping insertion in model container [2020-11-07 02:11:53,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:11:53,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:11:53,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:11:53,951 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:11:53,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:11:53,998 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:11:53,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53 WrapperNode [2020-11-07 02:11:53,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:11:54,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:11:54,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:11:54,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:11:54,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:54,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:54,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:54,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:54,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:54,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:54,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:54,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:11:54,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:11:54,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:11:54,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:11:54,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (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 02:11:54,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:11:54,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:11:54,136 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:11:54,137 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:11:54,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 02:11:54,137 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:11:54,137 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:11:54,138 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:11:54,138 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:11:54,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:11:54,139 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:11:54,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:11:54,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 02:11:54,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:11:54,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:11:54,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:11:54,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:11:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:11:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:11:54,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:11:54,850 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:11:54,850 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 02:11:54,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:54 BoogieIcfgContainer [2020-11-07 02:11:54,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:11:54,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:11:54,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:11:54,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:11:54,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:11:53" (1/3) ... [2020-11-07 02:11:54,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225c8af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:54, skipping insertion in model container [2020-11-07 02:11:54,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (2/3) ... [2020-11-07 02:11:54,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225c8af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:54, skipping insertion in model container [2020-11-07 02:11:54,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:54" (3/3) ... [2020-11-07 02:11:54,869 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt7.c [2020-11-07 02:11:54,886 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:11:54,891 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:11:54,906 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:11:54,939 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:11:54,939 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:11:54,939 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:11:54,940 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:11:54,940 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:11:54,940 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:11:54,940 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:11:54,940 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:11:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-11-07 02:11:54,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-07 02:11:54,967 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:54,968 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] [2020-11-07 02:11:54,969 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:54,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:54,976 INFO L82 PathProgramCache]: Analyzing trace with hash -77608749, now seen corresponding path program 1 times [2020-11-07 02:11:54,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:54,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485592792] [2020-11-07 02:11:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:55,069 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:55,806 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-11-07 02:11:55,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:55,935 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 02:11:55,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485592792] [2020-11-07 02:11:55,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:55,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 02:11:55,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564979070] [2020-11-07 02:11:55,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 02:11:55,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:55,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 02:11:55,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-11-07 02:11:55,966 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 15 states. [2020-11-07 02:11:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:59,415 INFO L93 Difference]: Finished difference Result 124 states and 162 transitions. [2020-11-07 02:11:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 02:11:59,417 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-11-07 02:11:59,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:59,429 INFO L225 Difference]: With dead ends: 124 [2020-11-07 02:11:59,429 INFO L226 Difference]: Without dead ends: 78 [2020-11-07 02:11:59,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2020-11-07 02:11:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-07 02:11:59,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-11-07 02:11:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-07 02:11:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-11-07 02:11:59,501 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 35 [2020-11-07 02:11:59,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:59,502 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-11-07 02:11:59,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 02:11:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-11-07 02:11:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-07 02:11:59,504 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:59,505 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] [2020-11-07 02:11:59,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:11:59,505 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:59,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:59,507 INFO L82 PathProgramCache]: Analyzing trace with hash -447719508, now seen corresponding path program 1 times [2020-11-07 02:11:59,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:59,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991808560] [2020-11-07 02:11:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:20,245 WARN L194 SmtUtils]: Spent 20.73 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-07 02:13:28,639 WARN L194 SmtUtils]: Spent 1.14 m on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 02:13:49,008 WARN L194 SmtUtils]: Spent 20.24 s on a formula simplification. DAG size of input: 12634 DAG size of output: 278 [2020-11-07 02:13:49,029 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:49,032 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:49,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:49,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-07 02:13:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:49,302 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 02:13:49,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991808560] [2020-11-07 02:13:49,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:49,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:13:49,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612876768] [2020-11-07 02:13:49,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:13:49,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:49,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:13:49,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:13:49,307 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 5 states. [2020-11-07 02:13:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:49,836 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2020-11-07 02:13:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:13:49,836 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-11-07 02:13:49,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:49,839 INFO L225 Difference]: With dead ends: 95 [2020-11-07 02:13:49,839 INFO L226 Difference]: Without dead ends: 72 [2020-11-07 02:13:49,841 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 02:13:49,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-07 02:13:49,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2020-11-07 02:13:49,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-07 02:13:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-11-07 02:13:49,865 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 44 [2020-11-07 02:13:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:49,866 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-11-07 02:13:49,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:13:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-11-07 02:13:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-07 02:13:49,867 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:49,868 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] [2020-11-07 02:13:49,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:13:49,868 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:49,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:49,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1452038179, now seen corresponding path program 1 times [2020-11-07 02:13:49,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:49,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535489977] [2020-11-07 02:13:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:10,640 WARN L194 SmtUtils]: Spent 20.77 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-07 02:15:00,400 WARN L194 SmtUtils]: Spent 49.76 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 02:15:06,895 WARN L194 SmtUtils]: Spent 6.48 s on a formula simplification. DAG size of input: 542 DAG size of output: 232 [2020-11-07 02:15:06,901 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:15:06,903 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:15:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:07,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:15:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:07,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-07 02:15:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:07,101 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 02:15:07,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535489977] [2020-11-07 02:15:07,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:15:07,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:15:07,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635233984] [2020-11-07 02:15:07,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:15:07,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:15:07,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:15:07,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:15:07,109 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 5 states. [2020-11-07 02:15:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:15:09,626 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-11-07 02:15:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:15:09,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-11-07 02:15:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:15:09,630 INFO L225 Difference]: With dead ends: 85 [2020-11-07 02:15:09,631 INFO L226 Difference]: Without dead ends: 62 [2020-11-07 02:15:09,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:15:09,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-07 02:15:09,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-11-07 02:15:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-07 02:15:09,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2020-11-07 02:15:09,658 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 45 [2020-11-07 02:15:09,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:15:09,659 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2020-11-07 02:15:09,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:15:09,659 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2020-11-07 02:15:09,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-07 02:15:09,661 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:15:09,661 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] [2020-11-07 02:15:09,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:15:09,661 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:15:09,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:15:09,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1245039122, now seen corresponding path program 1 times [2020-11-07 02:15:09,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:15:09,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876935279] [2020-11-07 02:15:09,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:15:34,610 WARN L194 SmtUtils]: Spent 24.94 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-07 02:17:20,237 WARN L194 SmtUtils]: Spent 1.76 m on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 02:20:54,387 WARN L194 SmtUtils]: Spent 3.56 m on a formula simplification. DAG size of input: 44890 DAG size of output: 276 [2020-11-07 02:20:54,395 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:20:54,403 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:20:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:20:54,979 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2020-11-07 02:20:55,156 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2020-11-07 02:20:55,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:20:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:20:55,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-07 02:20:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:20:55,305 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 02:20:55,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876935279] [2020-11-07 02:20:55,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:20:55,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 02:20:55,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142912533] [2020-11-07 02:20:55,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 02:20:55,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:20:55,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 02:20:55,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-07 02:20:55,309 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 9 states. [2020-11-07 02:20:55,772 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-11-07 02:20:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:20:56,375 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2020-11-07 02:20:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 02:20:56,377 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-11-07 02:20:56,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:20:56,378 INFO L225 Difference]: With dead ends: 93 [2020-11-07 02:20:56,378 INFO L226 Difference]: Without dead ends: 70 [2020-11-07 02:20:56,379 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 02:20:56,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-07 02:20:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2020-11-07 02:20:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-07 02:20:56,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-11-07 02:20:56,406 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 46 [2020-11-07 02:20:56,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:20:56,407 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-11-07 02:20:56,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 02:20:56,407 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-11-07 02:20:56,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 02:20:56,409 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:20:56,409 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 02:20:56,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:20:56,409 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:20:56,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:20:56,410 INFO L82 PathProgramCache]: Analyzing trace with hash 153090441, now seen corresponding path program 1 times [2020-11-07 02:20:56,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:20:56,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069920313] [2020-11-07 02:20:56,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:21:23,391 WARN L194 SmtUtils]: Spent 26.98 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-07 02:23:09,296 WARN L194 SmtUtils]: Spent 1.77 m on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 02:23:41,764 WARN L194 SmtUtils]: Spent 32.42 s on a formula simplification. DAG size of input: 12634 DAG size of output: 246 [2020-11-07 02:23:41,769 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:23:41,771 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:23:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:23:41,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:23:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:23:41,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-07 02:23:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:23:41,909 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 02:23:41,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069920313] [2020-11-07 02:23:41,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:23:41,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:23:41,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813788815] [2020-11-07 02:23:41,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:23:41,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:23:41,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:23:41,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:23:41,918 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 5 states. [2020-11-07 02:23:42,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:23:42,292 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-11-07 02:23:42,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:23:42,293 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-11-07 02:23:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:23:42,294 INFO L225 Difference]: With dead ends: 92 [2020-11-07 02:23:42,294 INFO L226 Difference]: Without dead ends: 69 [2020-11-07 02:23:42,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:23:42,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-07 02:23:42,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2020-11-07 02:23:42,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-07 02:23:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-11-07 02:23:42,317 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 47 [2020-11-07 02:23:42,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:23:42,318 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-11-07 02:23:42,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:23:42,318 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-11-07 02:23:42,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-07 02:23:42,319 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:23:42,320 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 02:23:42,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:23:42,320 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:23:42,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:23:42,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1692474488, now seen corresponding path program 1 times [2020-11-07 02:23:42,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:23:42,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407159943] [2020-11-07 02:23:42,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:24:03,092 WARN L194 SmtUtils]: Spent 20.77 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-07 02:25:13,571 WARN L194 SmtUtils]: Spent 1.17 m on a formula simplification. DAG size of input: 41 DAG size of output: 35