/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/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:58:44,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:58:44,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:58:44,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 01:58:44,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 01:58:44,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 01:58:44,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 01:58:44,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 01:58:44,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 01:58:44,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 01:58:44,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 01:58:44,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 01:58:44,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:58:44,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:58:44,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:58:44,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:58:44,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:58:44,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:58:44,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:58:44,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:58:44,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:58:44,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:58:44,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:58:44,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:58:44,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 01:58:45,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:58:45,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:58:45,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:58:45,004 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 01:58:45,017 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:58:45,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:58:45,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:58:45,020 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:58:45,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:58:45,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:58:45,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:58:45,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:58:45,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:58:45,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:58:45,022 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:58:45,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:58:45,023 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:58:45,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:58:45,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:58:45,024 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:58:45,024 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:58:45,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:58:45,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:58:45,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:58:45,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:58:45,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:58:45,025 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:58:45,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:58:45,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:58:45,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:58:45,441 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:58:45,441 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:58:45,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-11-07 01:58:45,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca3dbb6ff/2621ce128fdd4f6982d1e94a5fc48960/FLAG32e82faa6 [2020-11-07 01:58:46,225 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:58:46,226 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-11-07 01:58:46,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca3dbb6ff/2621ce128fdd4f6982d1e94a5fc48960/FLAG32e82faa6 [2020-11-07 01:58:46,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca3dbb6ff/2621ce128fdd4f6982d1e94a5fc48960 [2020-11-07 01:58:46,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:58:46,602 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:58:46,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:58:46,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:58:46,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:58:46,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:46" (1/1) ... [2020-11-07 01:58:46,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f468e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:46, skipping insertion in model container [2020-11-07 01:58:46,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:46" (1/1) ... [2020-11-07 01:58:46,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:58:46,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:58:46,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:58:46,867 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:58:46,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:58:46,903 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:58:46,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:46 WrapperNode [2020-11-07 01:58:46,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:58:46,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:58:46,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:58:46,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:58:46,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:46" (1/1) ... [2020-11-07 01:58:46,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:46" (1/1) ... [2020-11-07 01:58:46,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:46" (1/1) ... [2020-11-07 01:58:46,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:46" (1/1) ... [2020-11-07 01:58:46,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:46" (1/1) ... [2020-11-07 01:58:46,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:46" (1/1) ... [2020-11-07 01:58:46,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:46" (1/1) ... [2020-11-07 01:58:46,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:58:46,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:58:46,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:58:46,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:58:46,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:58:47,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:58:47,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:58:47,030 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:58:47,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 01:58:47,030 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:58:47,030 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:58:47,030 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:58:47,031 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:58:47,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:58:47,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 01:58:47,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:58:47,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:58:47,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:58:47,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:58:47,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:58:47,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:58:47,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:58:47,482 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:58:47,483 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 01:58:47,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:47 BoogieIcfgContainer [2020-11-07 01:58:47,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:58:47,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:58:47,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:58:47,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:58:47,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:58:46" (1/3) ... [2020-11-07 01:58:47,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@502e05a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:47, skipping insertion in model container [2020-11-07 01:58:47,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:46" (2/3) ... [2020-11-07 01:58:47,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@502e05a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:47, skipping insertion in model container [2020-11-07 01:58:47,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:47" (3/3) ... [2020-11-07 01:58:47,504 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-11-07 01:58:47,521 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:58:47,525 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:58:47,540 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:58:47,592 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:58:47,592 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:58:47,592 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:58:47,592 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:58:47,593 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:58:47,593 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:58:47,593 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:58:47,593 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:58:47,615 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-11-07 01:58:47,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-07 01:58:47,625 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:47,626 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] [2020-11-07 01:58:47,627 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:47,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:47,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1359326843, now seen corresponding path program 1 times [2020-11-07 01:58:47,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:47,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398408264] [2020-11-07 01:58:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:47,742 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:48,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:48,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398408264] [2020-11-07 01:58:48,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:48,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 01:58:48,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375750431] [2020-11-07 01:58:48,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 01:58:48,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:48,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 01:58:48,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:58:48,125 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-11-07 01:58:48,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:48,269 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-11-07 01:58:48,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 01:58:48,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-11-07 01:58:48,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:48,280 INFO L225 Difference]: With dead ends: 55 [2020-11-07 01:58:48,280 INFO L226 Difference]: Without dead ends: 27 [2020-11-07 01:58:48,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:58:48,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-07 01:58:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-07 01:58:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-07 01:58:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-11-07 01:58:48,326 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2020-11-07 01:58:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:48,327 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-11-07 01:58:48,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 01:58:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-11-07 01:58:48,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-07 01:58:48,328 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:48,328 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] [2020-11-07 01:58:48,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:58:48,329 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:48,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:48,330 INFO L82 PathProgramCache]: Analyzing trace with hash -756925380, now seen corresponding path program 1 times [2020-11-07 01:58:48,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:48,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194883297] [2020-11-07 01:58:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:48,334 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:48,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:48,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194883297] [2020-11-07 01:58:48,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:48,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 01:58:48,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779474762] [2020-11-07 01:58:48,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 01:58:48,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:48,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 01:58:48,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 01:58:48,471 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 4 states. [2020-11-07 01:58:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:48,627 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-11-07 01:58:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 01:58:48,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-07 01:58:48,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:48,629 INFO L225 Difference]: With dead ends: 38 [2020-11-07 01:58:48,629 INFO L226 Difference]: Without dead ends: 31 [2020-11-07 01:58:48,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 01:58:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-07 01:58:48,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-11-07 01:58:48,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-07 01:58:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-11-07 01:58:48,641 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-11-07 01:58:48,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:48,642 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-11-07 01:58:48,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 01:58:48,642 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-11-07 01:58:48,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-07 01:58:48,643 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:48,643 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] [2020-11-07 01:58:48,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:58:48,643 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:48,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:48,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1456501324, now seen corresponding path program 1 times [2020-11-07 01:58:48,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:48,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721291061] [2020-11-07 01:58:48,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:48,721 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:48,723 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:48,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:48,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721291061] [2020-11-07 01:58:48,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:48,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 01:58:48,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529280417] [2020-11-07 01:58:48,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 01:58:48,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:48,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 01:58:48,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:58:48,898 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 6 states. [2020-11-07 01:58:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:49,073 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-11-07 01:58:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 01:58:49,074 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-11-07 01:58:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:49,075 INFO L225 Difference]: With dead ends: 43 [2020-11-07 01:58:49,075 INFO L226 Difference]: Without dead ends: 36 [2020-11-07 01:58:49,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-07 01:58:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-07 01:58:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-11-07 01:58:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-07 01:58:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-11-07 01:58:49,086 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2020-11-07 01:58:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:49,086 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-11-07 01:58:49,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 01:58:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-11-07 01:58:49,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 01:58:49,088 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:49,088 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 01:58:49,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 01:58:49,089 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:49,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:49,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1068341444, now seen corresponding path program 2 times [2020-11-07 01:58:49,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:49,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071507487] [2020-11-07 01:58:49,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:49,159 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:49,161 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:49,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:49,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071507487] [2020-11-07 01:58:49,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:49,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 01:58:49,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590030011] [2020-11-07 01:58:49,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 01:58:49,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:49,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 01:58:49,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 01:58:49,365 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 8 states. [2020-11-07 01:58:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:49,583 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-11-07 01:58:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 01:58:49,584 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-11-07 01:58:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:49,585 INFO L225 Difference]: With dead ends: 48 [2020-11-07 01:58:49,585 INFO L226 Difference]: Without dead ends: 41 [2020-11-07 01:58:49,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:58:49,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-07 01:58:49,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-11-07 01:58:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-07 01:58:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-11-07 01:58:49,596 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2020-11-07 01:58:49,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:49,596 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-11-07 01:58:49,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 01:58:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-11-07 01:58:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 01:58:49,603 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:49,604 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:49,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 01:58:49,604 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:49,605 INFO L82 PathProgramCache]: Analyzing trace with hash 35799732, now seen corresponding path program 3 times [2020-11-07 01:58:49,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:49,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898438793] [2020-11-07 01:58:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:49,688 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:49,689 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:49,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:49,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898438793] [2020-11-07 01:58:49,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:49,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 01:58:49,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474747080] [2020-11-07 01:58:49,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 01:58:49,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:49,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 01:58:49,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-07 01:58:49,926 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 10 states. [2020-11-07 01:58:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:50,254 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-11-07 01:58:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 01:58:50,255 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-11-07 01:58:50,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:50,256 INFO L225 Difference]: With dead ends: 53 [2020-11-07 01:58:50,257 INFO L226 Difference]: Without dead ends: 46 [2020-11-07 01:58:50,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-11-07 01:58:50,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-07 01:58:50,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-11-07 01:58:50,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-07 01:58:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-11-07 01:58:50,267 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2020-11-07 01:58:50,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:50,267 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-11-07 01:58:50,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 01:58:50,267 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-11-07 01:58:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 01:58:50,269 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:50,269 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:50,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 01:58:50,269 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:50,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:50,270 INFO L82 PathProgramCache]: Analyzing trace with hash 197710396, now seen corresponding path program 4 times [2020-11-07 01:58:50,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:50,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301039010] [2020-11-07 01:58:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:50,330 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:50,332 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:50,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:50,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301039010] [2020-11-07 01:58:50,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:50,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 01:58:50,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539216102] [2020-11-07 01:58:50,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 01:58:50,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:50,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 01:58:50,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:58:50,529 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 12 states. [2020-11-07 01:58:50,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:50,798 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-11-07 01:58:50,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 01:58:50,799 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-11-07 01:58:50,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:50,800 INFO L225 Difference]: With dead ends: 58 [2020-11-07 01:58:50,800 INFO L226 Difference]: Without dead ends: 51 [2020-11-07 01:58:50,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-11-07 01:58:50,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-07 01:58:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-11-07 01:58:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-07 01:58:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-11-07 01:58:50,810 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2020-11-07 01:58:50,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:50,811 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-11-07 01:58:50,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 01:58:50,811 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-11-07 01:58:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 01:58:50,812 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:50,812 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:50,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 01:58:50,813 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:50,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:50,813 INFO L82 PathProgramCache]: Analyzing trace with hash 116832180, now seen corresponding path program 5 times [2020-11-07 01:58:50,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:50,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642684392] [2020-11-07 01:58:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:50,866 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:50,868 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:51,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:51,101 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 01:58:51,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642684392] [2020-11-07 01:58:51,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:51,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 01:58:51,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729004998] [2020-11-07 01:58:51,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 01:58:51,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:51,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 01:58:51,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-07 01:58:51,105 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 14 states. [2020-11-07 01:58:51,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:51,448 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-11-07 01:58:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 01:58:51,449 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-11-07 01:58:51,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:51,450 INFO L225 Difference]: With dead ends: 63 [2020-11-07 01:58:51,450 INFO L226 Difference]: Without dead ends: 56 [2020-11-07 01:58:51,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-11-07 01:58:51,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-07 01:58:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-11-07 01:58:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-07 01:58:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-11-07 01:58:51,461 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2020-11-07 01:58:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:51,461 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-11-07 01:58:51,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 01:58:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-11-07 01:58:51,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-07 01:58:51,463 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:51,464 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:51,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 01:58:51,464 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:51,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1837793988, now seen corresponding path program 6 times [2020-11-07 01:58:51,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:51,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250722414] [2020-11-07 01:58:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:51,516 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:51,520 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:51,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:51,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250722414] [2020-11-07 01:58:51,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:51,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 01:58:51,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838984939] [2020-11-07 01:58:51,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 01:58:51,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:51,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 01:58:51,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-07 01:58:51,786 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 16 states. [2020-11-07 01:58:52,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:52,142 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-11-07 01:58:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 01:58:52,144 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-11-07 01:58:52,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:52,145 INFO L225 Difference]: With dead ends: 68 [2020-11-07 01:58:52,145 INFO L226 Difference]: Without dead ends: 61 [2020-11-07 01:58:52,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-11-07 01:58:52,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-07 01:58:52,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-11-07 01:58:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-07 01:58:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-11-07 01:58:52,156 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2020-11-07 01:58:52,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:52,156 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-11-07 01:58:52,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 01:58:52,157 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-11-07 01:58:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-07 01:58:52,158 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:52,158 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:52,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 01:58:52,158 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:52,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:52,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1736643404, now seen corresponding path program 7 times [2020-11-07 01:58:52,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:52,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954505496] [2020-11-07 01:58:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:52,214 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:52,215 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:52,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:52,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954505496] [2020-11-07 01:58:52,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:52,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 01:58:52,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211994032] [2020-11-07 01:58:52,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 01:58:52,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:52,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 01:58:52,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-07 01:58:52,510 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 18 states. [2020-11-07 01:58:52,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:52,986 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-11-07 01:58:52,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 01:58:52,993 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-11-07 01:58:52,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:52,994 INFO L225 Difference]: With dead ends: 73 [2020-11-07 01:58:52,994 INFO L226 Difference]: Without dead ends: 66 [2020-11-07 01:58:52,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-11-07 01:58:52,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-07 01:58:53,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-11-07 01:58:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-07 01:58:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-11-07 01:58:53,013 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 57 [2020-11-07 01:58:53,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:53,014 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-11-07 01:58:53,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 01:58:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-11-07 01:58:53,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-07 01:58:53,019 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:53,019 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:53,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 01:58:53,020 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:53,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:53,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1971873852, now seen corresponding path program 8 times [2020-11-07 01:58:53,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:53,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842782886] [2020-11-07 01:58:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:53,070 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:53,072 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:53,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:53,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842782886] [2020-11-07 01:58:53,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:53,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 01:58:53,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507793284] [2020-11-07 01:58:53,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 01:58:53,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:53,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 01:58:53,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-11-07 01:58:53,411 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 20 states. [2020-11-07 01:58:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:53,962 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-11-07 01:58:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 01:58:53,962 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-11-07 01:58:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:53,964 INFO L225 Difference]: With dead ends: 78 [2020-11-07 01:58:53,964 INFO L226 Difference]: Without dead ends: 71 [2020-11-07 01:58:53,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 01:58:53,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-07 01:58:53,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-11-07 01:58:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-07 01:58:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-11-07 01:58:53,992 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 62 [2020-11-07 01:58:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:53,996 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-11-07 01:58:53,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 01:58:53,996 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-11-07 01:58:53,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 01:58:53,998 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:53,998 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:53,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 01:58:53,999 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:54,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:54,001 INFO L82 PathProgramCache]: Analyzing trace with hash -746266188, now seen corresponding path program 9 times [2020-11-07 01:58:54,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:54,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648149952] [2020-11-07 01:58:54,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:54,050 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:54,052 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:54,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:54,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648149952] [2020-11-07 01:58:54,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:54,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 01:58:54,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554433481] [2020-11-07 01:58:54,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 01:58:54,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:54,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 01:58:54,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-11-07 01:58:54,477 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 22 states. [2020-11-07 01:58:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:55,047 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-11-07 01:58:55,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-07 01:58:55,048 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-11-07 01:58:55,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:55,050 INFO L225 Difference]: With dead ends: 83 [2020-11-07 01:58:55,050 INFO L226 Difference]: Without dead ends: 76 [2020-11-07 01:58:55,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 01:58:55,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-07 01:58:55,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-11-07 01:58:55,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-07 01:58:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-11-07 01:58:55,063 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 67 [2020-11-07 01:58:55,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:55,064 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-11-07 01:58:55,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 01:58:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-11-07 01:58:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-11-07 01:58:55,065 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:55,065 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:55,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 01:58:55,066 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:55,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:55,066 INFO L82 PathProgramCache]: Analyzing trace with hash 439456572, now seen corresponding path program 10 times [2020-11-07 01:58:55,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:55,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181011742] [2020-11-07 01:58:55,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:55,108 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:55,110 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:55,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:55,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181011742] [2020-11-07 01:58:55,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:55,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 01:58:55,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990785573] [2020-11-07 01:58:55,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 01:58:55,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:55,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 01:58:55,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-11-07 01:58:55,508 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 24 states. [2020-11-07 01:58:56,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:56,164 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-11-07 01:58:56,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 01:58:56,165 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 72 [2020-11-07 01:58:56,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:56,166 INFO L225 Difference]: With dead ends: 88 [2020-11-07 01:58:56,166 INFO L226 Difference]: Without dead ends: 81 [2020-11-07 01:58:56,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 01:58:56,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-07 01:58:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-11-07 01:58:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 01:58:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-11-07 01:58:56,186 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 72 [2020-11-07 01:58:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:56,187 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-11-07 01:58:56,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 01:58:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-11-07 01:58:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-07 01:58:56,188 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:56,188 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:56,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 01:58:56,189 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:56,189 INFO L82 PathProgramCache]: Analyzing trace with hash 283023028, now seen corresponding path program 11 times [2020-11-07 01:58:56,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:56,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808364347] [2020-11-07 01:58:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:56,232 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:56,234 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:56,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:56,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808364347] [2020-11-07 01:58:56,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:56,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-11-07 01:58:56,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276995760] [2020-11-07 01:58:56,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 01:58:56,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:56,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 01:58:56,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-11-07 01:58:56,698 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 26 states. [2020-11-07 01:58:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:57,434 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2020-11-07 01:58:57,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-07 01:58:57,435 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 77 [2020-11-07 01:58:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:57,436 INFO L225 Difference]: With dead ends: 93 [2020-11-07 01:58:57,436 INFO L226 Difference]: Without dead ends: 86 [2020-11-07 01:58:57,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 01:58:57,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-07 01:58:57,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-11-07 01:58:57,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 01:58:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-11-07 01:58:57,448 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 77 [2020-11-07 01:58:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:57,449 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-11-07 01:58:57,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 01:58:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-11-07 01:58:57,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-07 01:58:57,450 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:57,450 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:57,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 01:58:57,451 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:57,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:57,451 INFO L82 PathProgramCache]: Analyzing trace with hash 698416700, now seen corresponding path program 12 times [2020-11-07 01:58:57,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:57,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090904543] [2020-11-07 01:58:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:57,505 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:57,506 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:57,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:57,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090904543] [2020-11-07 01:58:57,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:57,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-11-07 01:58:57,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557018202] [2020-11-07 01:58:57,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 01:58:57,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:57,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 01:58:57,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-11-07 01:58:57,958 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 28 states. [2020-11-07 01:58:58,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:58,724 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-11-07 01:58:58,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-07 01:58:58,724 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2020-11-07 01:58:58,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:58,725 INFO L225 Difference]: With dead ends: 98 [2020-11-07 01:58:58,725 INFO L226 Difference]: Without dead ends: 91 [2020-11-07 01:58:58,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 01:58:58,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-07 01:58:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-11-07 01:58:58,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 01:58:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-11-07 01:58:58,738 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 82 [2020-11-07 01:58:58,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:58,738 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-11-07 01:58:58,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 01:58:58,738 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-11-07 01:58:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-07 01:58:58,740 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:58,740 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:58,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 01:58:58,741 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:58,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:58,741 INFO L82 PathProgramCache]: Analyzing trace with hash -447083596, now seen corresponding path program 13 times [2020-11-07 01:58:58,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:58,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951009792] [2020-11-07 01:58:58,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:58,795 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:58,797 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:59,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:59,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951009792] [2020-11-07 01:58:59,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:59,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-11-07 01:58:59,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361668320] [2020-11-07 01:58:59,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-07 01:58:59,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:59,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-07 01:58:59,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-11-07 01:58:59,337 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 30 states. [2020-11-07 01:59:00,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:00,217 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-11-07 01:59:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-07 01:59:00,218 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 87 [2020-11-07 01:59:00,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:00,219 INFO L225 Difference]: With dead ends: 103 [2020-11-07 01:59:00,220 INFO L226 Difference]: Without dead ends: 96 [2020-11-07 01:59:00,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 01:59:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-07 01:59:00,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-11-07 01:59:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 01:59:00,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-11-07 01:59:00,239 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 87 [2020-11-07 01:59:00,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:00,240 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-11-07 01:59:00,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-07 01:59:00,242 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-11-07 01:59:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-07 01:59:00,245 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:00,245 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:00,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 01:59:00,246 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:00,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1861834436, now seen corresponding path program 14 times [2020-11-07 01:59:00,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:00,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116410034] [2020-11-07 01:59:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:00,293 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:00,297 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:00,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:00,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116410034] [2020-11-07 01:59:00,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:00,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-11-07 01:59:00,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532202022] [2020-11-07 01:59:00,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 01:59:00,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:00,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 01:59:00,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-11-07 01:59:00,949 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 32 states. [2020-11-07 01:59:01,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:01,998 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-11-07 01:59:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-07 01:59:02,000 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2020-11-07 01:59:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:02,001 INFO L225 Difference]: With dead ends: 108 [2020-11-07 01:59:02,001 INFO L226 Difference]: Without dead ends: 101 [2020-11-07 01:59:02,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 01:59:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-07 01:59:02,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-11-07 01:59:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 01:59:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2020-11-07 01:59:02,013 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 92 [2020-11-07 01:59:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:02,013 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2020-11-07 01:59:02,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 01:59:02,013 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2020-11-07 01:59:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-07 01:59:02,014 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:02,015 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:02,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 01:59:02,015 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:02,016 INFO L82 PathProgramCache]: Analyzing trace with hash 566706356, now seen corresponding path program 15 times [2020-11-07 01:59:02,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:02,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690069491] [2020-11-07 01:59:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:02,075 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:02,077 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:02,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:02,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690069491] [2020-11-07 01:59:02,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:02,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-11-07 01:59:02,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284660886] [2020-11-07 01:59:02,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-07 01:59:02,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:02,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-07 01:59:02,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 01:59:02,815 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 34 states. [2020-11-07 01:59:03,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:03,913 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2020-11-07 01:59:03,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-07 01:59:03,914 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2020-11-07 01:59:03,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:03,915 INFO L225 Difference]: With dead ends: 113 [2020-11-07 01:59:03,915 INFO L226 Difference]: Without dead ends: 106 [2020-11-07 01:59:03,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 01:59:03,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-07 01:59:03,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-11-07 01:59:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 01:59:03,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-11-07 01:59:03,924 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 97 [2020-11-07 01:59:03,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:03,924 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-11-07 01:59:03,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-07 01:59:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-11-07 01:59:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-07 01:59:03,926 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:03,926 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:03,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 01:59:03,927 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:03,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:03,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2121100228, now seen corresponding path program 16 times [2020-11-07 01:59:03,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:03,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559732189] [2020-11-07 01:59:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:03,967 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:03,968 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:04,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:04,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559732189] [2020-11-07 01:59:04,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:04,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-11-07 01:59:04,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922673296] [2020-11-07 01:59:04,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 01:59:04,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:04,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 01:59:04,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 01:59:04,727 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 36 states. [2020-11-07 01:59:05,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:05,880 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-11-07 01:59:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-07 01:59:05,880 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 102 [2020-11-07 01:59:05,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:05,882 INFO L225 Difference]: With dead ends: 118 [2020-11-07 01:59:05,882 INFO L226 Difference]: Without dead ends: 111 [2020-11-07 01:59:05,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 01:59:05,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-07 01:59:05,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-11-07 01:59:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-07 01:59:05,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-11-07 01:59:05,892 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 102 [2020-11-07 01:59:05,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:05,892 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-11-07 01:59:05,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 01:59:05,892 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-11-07 01:59:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-07 01:59:05,893 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:05,894 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:05,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 01:59:05,894 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:05,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:05,894 INFO L82 PathProgramCache]: Analyzing trace with hash -755616332, now seen corresponding path program 17 times [2020-11-07 01:59:05,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:05,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630379243] [2020-11-07 01:59:05,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:05,943 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:05,945 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:06,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:06,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630379243] [2020-11-07 01:59:06,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:06,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-11-07 01:59:06,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197750941] [2020-11-07 01:59:06,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-07 01:59:06,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:06,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-07 01:59:06,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 01:59:06,673 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 38 states. [2020-11-07 01:59:08,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:08,030 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2020-11-07 01:59:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-07 01:59:08,031 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2020-11-07 01:59:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:08,032 INFO L225 Difference]: With dead ends: 123 [2020-11-07 01:59:08,032 INFO L226 Difference]: Without dead ends: 116 [2020-11-07 01:59:08,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 01:59:08,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-07 01:59:08,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2020-11-07 01:59:08,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-07 01:59:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-11-07 01:59:08,041 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 107 [2020-11-07 01:59:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:08,041 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-11-07 01:59:08,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-07 01:59:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-11-07 01:59:08,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-07 01:59:08,043 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:08,043 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:08,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 01:59:08,043 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:08,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:08,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1886699324, now seen corresponding path program 18 times [2020-11-07 01:59:08,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:08,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893859892] [2020-11-07 01:59:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:08,097 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:08,099 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:09,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:09,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893859892] [2020-11-07 01:59:09,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:09,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-11-07 01:59:09,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81813131] [2020-11-07 01:59:09,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 01:59:09,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:09,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 01:59:09,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 01:59:09,040 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 40 states. [2020-11-07 01:59:10,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:10,523 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-11-07 01:59:10,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-07 01:59:10,524 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 112 [2020-11-07 01:59:10,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:10,525 INFO L225 Difference]: With dead ends: 128 [2020-11-07 01:59:10,525 INFO L226 Difference]: Without dead ends: 121 [2020-11-07 01:59:10,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 01:59:10,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-11-07 01:59:10,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2020-11-07 01:59:10,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-11-07 01:59:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2020-11-07 01:59:10,534 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 112 [2020-11-07 01:59:10,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:10,535 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2020-11-07 01:59:10,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 01:59:10,535 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2020-11-07 01:59:10,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-11-07 01:59:10,535 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:10,536 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:10,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 01:59:10,536 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:10,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:10,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1102506676, now seen corresponding path program 19 times [2020-11-07 01:59:10,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:10,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217004023] [2020-11-07 01:59:10,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:10,587 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:10,589 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:11,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:11,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217004023] [2020-11-07 01:59:11,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:11,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-11-07 01:59:11,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607422030] [2020-11-07 01:59:11,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-07 01:59:11,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:11,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-07 01:59:11,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 01:59:11,532 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 42 states. [2020-11-07 01:59:13,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:13,009 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2020-11-07 01:59:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-11-07 01:59:13,010 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 117 [2020-11-07 01:59:13,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:13,011 INFO L225 Difference]: With dead ends: 133 [2020-11-07 01:59:13,012 INFO L226 Difference]: Without dead ends: 126 [2020-11-07 01:59:13,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 01:59:13,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-07 01:59:13,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2020-11-07 01:59:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-11-07 01:59:13,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-11-07 01:59:13,020 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 117 [2020-11-07 01:59:13,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:13,021 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-11-07 01:59:13,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-07 01:59:13,021 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-11-07 01:59:13,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-11-07 01:59:13,022 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:13,022 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:13,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 01:59:13,022 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:13,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:13,023 INFO L82 PathProgramCache]: Analyzing trace with hash 383593020, now seen corresponding path program 20 times [2020-11-07 01:59:13,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:13,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442065512] [2020-11-07 01:59:13,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:13,091 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:13,092 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:14,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:14,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442065512] [2020-11-07 01:59:14,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:14,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-11-07 01:59:14,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525792527] [2020-11-07 01:59:14,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-07 01:59:14,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:14,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-07 01:59:14,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 01:59:14,165 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 44 states. [2020-11-07 01:59:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:15,858 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-11-07 01:59:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-07 01:59:15,863 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 122 [2020-11-07 01:59:15,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:15,864 INFO L225 Difference]: With dead ends: 138 [2020-11-07 01:59:15,864 INFO L226 Difference]: Without dead ends: 131 [2020-11-07 01:59:15,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 01:59:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-07 01:59:15,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2020-11-07 01:59:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-11-07 01:59:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2020-11-07 01:59:15,873 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 122 [2020-11-07 01:59:15,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:15,874 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2020-11-07 01:59:15,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-07 01:59:15,874 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2020-11-07 01:59:15,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-07 01:59:15,875 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:15,875 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:15,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 01:59:15,875 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash -220635212, now seen corresponding path program 21 times [2020-11-07 01:59:15,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:15,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99739859] [2020-11-07 01:59:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:15,917 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:15,918 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:17,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:17,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99739859] [2020-11-07 01:59:17,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:17,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-11-07 01:59:17,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225052681] [2020-11-07 01:59:17,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-07 01:59:17,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:17,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-07 01:59:17,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 01:59:17,106 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 46 states. [2020-11-07 01:59:19,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:19,061 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2020-11-07 01:59:19,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-07 01:59:19,063 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 127 [2020-11-07 01:59:19,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:19,064 INFO L225 Difference]: With dead ends: 143 [2020-11-07 01:59:19,064 INFO L226 Difference]: Without dead ends: 136 [2020-11-07 01:59:19,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-11-07 01:59:19,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-07 01:59:19,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2020-11-07 01:59:19,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-07 01:59:19,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-11-07 01:59:19,072 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 127 [2020-11-07 01:59:19,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:19,073 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-11-07 01:59:19,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-07 01:59:19,073 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-11-07 01:59:19,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-11-07 01:59:19,074 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:19,074 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:19,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 01:59:19,074 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:19,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:19,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1912329532, now seen corresponding path program 22 times [2020-11-07 01:59:19,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:19,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978755800] [2020-11-07 01:59:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:19,121 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:19,122 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:20,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:20,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978755800] [2020-11-07 01:59:20,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:20,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-11-07 01:59:20,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236688357] [2020-11-07 01:59:20,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-07 01:59:20,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:20,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-07 01:59:20,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 01:59:20,416 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 48 states. [2020-11-07 01:59:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:22,466 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2020-11-07 01:59:22,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-11-07 01:59:22,466 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 132 [2020-11-07 01:59:22,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:22,468 INFO L225 Difference]: With dead ends: 148 [2020-11-07 01:59:22,468 INFO L226 Difference]: Without dead ends: 141 [2020-11-07 01:59:22,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-11-07 01:59:22,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-07 01:59:22,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2020-11-07 01:59:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-11-07 01:59:22,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2020-11-07 01:59:22,477 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 132 [2020-11-07 01:59:22,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:22,477 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2020-11-07 01:59:22,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-07 01:59:22,477 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2020-11-07 01:59:22,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-11-07 01:59:22,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:22,478 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:22,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 01:59:22,479 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:22,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1490185036, now seen corresponding path program 23 times [2020-11-07 01:59:22,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:22,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946816997] [2020-11-07 01:59:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:22,524 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:22,526 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:23,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:23,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946816997] [2020-11-07 01:59:23,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:23,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-11-07 01:59:23,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791755727] [2020-11-07 01:59:23,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-07 01:59:23,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:23,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-07 01:59:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 01:59:23,927 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 50 states. [2020-11-07 01:59:26,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:26,225 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2020-11-07 01:59:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-11-07 01:59:26,226 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 137 [2020-11-07 01:59:26,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:26,227 INFO L225 Difference]: With dead ends: 153 [2020-11-07 01:59:26,228 INFO L226 Difference]: Without dead ends: 146 [2020-11-07 01:59:26,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-11-07 01:59:26,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-07 01:59:26,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-11-07 01:59:26,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-11-07 01:59:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-11-07 01:59:26,235 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 137 [2020-11-07 01:59:26,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:26,235 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-11-07 01:59:26,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-07 01:59:26,236 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-11-07 01:59:26,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-11-07 01:59:26,236 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:26,237 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:26,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 01:59:26,237 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:26,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:26,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1023360964, now seen corresponding path program 24 times [2020-11-07 01:59:26,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:26,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105546905] [2020-11-07 01:59:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:26,288 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:26,289 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:27,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:27,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105546905] [2020-11-07 01:59:27,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:27,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-11-07 01:59:27,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213747372] [2020-11-07 01:59:27,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-07 01:59:27,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:27,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-07 01:59:27,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 01:59:27,798 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 52 states. [2020-11-07 01:59:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:30,259 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-11-07 01:59:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-07 01:59:30,259 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 142 [2020-11-07 01:59:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:30,261 INFO L225 Difference]: With dead ends: 158 [2020-11-07 01:59:30,261 INFO L226 Difference]: Without dead ends: 151 [2020-11-07 01:59:30,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-11-07 01:59:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-11-07 01:59:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2020-11-07 01:59:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-07 01:59:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2020-11-07 01:59:30,269 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 142 [2020-11-07 01:59:30,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:30,270 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2020-11-07 01:59:30,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-07 01:59:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2020-11-07 01:59:30,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-11-07 01:59:30,271 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:30,271 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:30,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 01:59:30,271 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:30,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:30,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1535347124, now seen corresponding path program 25 times [2020-11-07 01:59:30,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:30,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464592355] [2020-11-07 01:59:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:30,314 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:30,315 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:31,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:31,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464592355] [2020-11-07 01:59:31,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:31,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-11-07 01:59:31,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182304384] [2020-11-07 01:59:31,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-07 01:59:31,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:31,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-07 01:59:31,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 01:59:31,946 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 54 states. [2020-11-07 01:59:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:34,659 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2020-11-07 01:59:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-07 01:59:34,660 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 147 [2020-11-07 01:59:34,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:34,662 INFO L225 Difference]: With dead ends: 163 [2020-11-07 01:59:34,662 INFO L226 Difference]: Without dead ends: 156 [2020-11-07 01:59:34,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-11-07 01:59:34,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-11-07 01:59:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-11-07 01:59:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-11-07 01:59:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-11-07 01:59:34,675 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 147 [2020-11-07 01:59:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:34,675 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-11-07 01:59:34,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-11-07 01:59:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-11-07 01:59:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-11-07 01:59:34,676 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:34,677 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:34,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 01:59:34,677 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:34,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:34,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1893995716, now seen corresponding path program 26 times [2020-11-07 01:59:34,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:34,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659788993] [2020-11-07 01:59:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:34,725 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:34,726 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:36,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:36,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659788993] [2020-11-07 01:59:36,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:36,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-11-07 01:59:36,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656559266] [2020-11-07 01:59:36,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-07 01:59:36,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:36,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-07 01:59:36,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 01:59:36,468 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 56 states. [2020-11-07 01:59:39,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:39,380 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2020-11-07 01:59:39,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-11-07 01:59:39,381 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 152 [2020-11-07 01:59:39,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:39,382 INFO L225 Difference]: With dead ends: 168 [2020-11-07 01:59:39,382 INFO L226 Difference]: Without dead ends: 161 [2020-11-07 01:59:39,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-11-07 01:59:39,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-11-07 01:59:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2020-11-07 01:59:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-07 01:59:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2020-11-07 01:59:39,390 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 152 [2020-11-07 01:59:39,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:39,391 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2020-11-07 01:59:39,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-07 01:59:39,391 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2020-11-07 01:59:39,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-07 01:59:39,392 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:39,392 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:39,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 01:59:39,392 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:39,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:39,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1219182260, now seen corresponding path program 27 times [2020-11-07 01:59:39,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:39,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916663687] [2020-11-07 01:59:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:39,445 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:39,446 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:41,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:41,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916663687] [2020-11-07 01:59:41,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:41,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2020-11-07 01:59:41,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868377140] [2020-11-07 01:59:41,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-11-07 01:59:41,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:41,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-11-07 01:59:41,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-11-07 01:59:41,316 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 58 states. [2020-11-07 01:59:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:44,375 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2020-11-07 01:59:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-11-07 01:59:44,375 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 157 [2020-11-07 01:59:44,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:44,377 INFO L225 Difference]: With dead ends: 173 [2020-11-07 01:59:44,377 INFO L226 Difference]: Without dead ends: 166 [2020-11-07 01:59:44,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-11-07 01:59:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-11-07 01:59:44,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2020-11-07 01:59:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-11-07 01:59:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-11-07 01:59:44,386 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 157 [2020-11-07 01:59:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:44,387 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-11-07 01:59:44,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-11-07 01:59:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-11-07 01:59:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-11-07 01:59:44,388 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:44,388 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:44,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 01:59:44,388 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:44,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:44,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1619175876, now seen corresponding path program 28 times [2020-11-07 01:59:44,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:44,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755902529] [2020-11-07 01:59:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:44,428 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:44,429 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:46,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:46,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755902529] [2020-11-07 01:59:46,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:46,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-11-07 01:59:46,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784917663] [2020-11-07 01:59:46,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-11-07 01:59:46,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:46,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-11-07 01:59:46,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 01:59:46,477 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 60 states. [2020-11-07 01:59:49,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:49,824 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2020-11-07 01:59:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-11-07 01:59:49,825 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 162 [2020-11-07 01:59:49,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:49,827 INFO L225 Difference]: With dead ends: 178 [2020-11-07 01:59:49,827 INFO L226 Difference]: Without dead ends: 171 [2020-11-07 01:59:49,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-11-07 01:59:49,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-11-07 01:59:49,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2020-11-07 01:59:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-11-07 01:59:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2020-11-07 01:59:49,836 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 162 [2020-11-07 01:59:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:49,837 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2020-11-07 01:59:49,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-11-07 01:59:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2020-11-07 01:59:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-11-07 01:59:49,838 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:49,838 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:49,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 01:59:49,838 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:49,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:49,839 INFO L82 PathProgramCache]: Analyzing trace with hash -478891084, now seen corresponding path program 29 times [2020-11-07 01:59:49,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:49,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148768016] [2020-11-07 01:59:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:49,890 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:49,892 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:52,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:52,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148768016] [2020-11-07 01:59:52,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:52,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2020-11-07 01:59:52,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777252728] [2020-11-07 01:59:52,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-11-07 01:59:52,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:52,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-11-07 01:59:52,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-11-07 01:59:52,081 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 62 states. [2020-11-07 01:59:55,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:55,653 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2020-11-07 01:59:55,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-11-07 01:59:55,654 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 167 [2020-11-07 01:59:55,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:55,656 INFO L225 Difference]: With dead ends: 183 [2020-11-07 01:59:55,656 INFO L226 Difference]: Without dead ends: 176 [2020-11-07 01:59:55,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-11-07 01:59:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-11-07 01:59:55,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2020-11-07 01:59:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-11-07 01:59:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2020-11-07 01:59:55,666 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 167 [2020-11-07 01:59:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:55,666 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2020-11-07 01:59:55,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-11-07 01:59:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2020-11-07 01:59:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-11-07 01:59:55,667 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:55,667 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:55,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 01:59:55,668 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:55,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:55,668 INFO L82 PathProgramCache]: Analyzing trace with hash 22348092, now seen corresponding path program 30 times [2020-11-07 01:59:55,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:55,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343455245] [2020-11-07 01:59:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:55,722 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:55,723 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:58,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:58,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343455245] [2020-11-07 01:59:58,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:58,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-11-07 01:59:58,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292627806] [2020-11-07 01:59:58,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-11-07 01:59:58,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:58,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-11-07 01:59:58,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 01:59:58,053 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 64 states. [2020-11-07 02:00:01,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:01,864 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2020-11-07 02:00:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-11-07 02:00:01,864 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 172 [2020-11-07 02:00:01,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:01,867 INFO L225 Difference]: With dead ends: 188 [2020-11-07 02:00:01,867 INFO L226 Difference]: Without dead ends: 181 [2020-11-07 02:00:01,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-11-07 02:00:01,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-11-07 02:00:01,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2020-11-07 02:00:01,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-11-07 02:00:01,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2020-11-07 02:00:01,877 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 172 [2020-11-07 02:00:01,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:01,877 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2020-11-07 02:00:01,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-11-07 02:00:01,877 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2020-11-07 02:00:01,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-11-07 02:00:01,878 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:01,879 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 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 02:00:01,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 02:00:01,879 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:01,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:01,879 INFO L82 PathProgramCache]: Analyzing trace with hash -592451404, now seen corresponding path program 31 times [2020-11-07 02:00:01,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:01,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458708850] [2020-11-07 02:00:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:01,923 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:01,924 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:04,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:04,405 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 02:00:04,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458708850] [2020-11-07 02:00:04,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:04,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-11-07 02:00:04,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404744329] [2020-11-07 02:00:04,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-11-07 02:00:04,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:04,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-11-07 02:00:04,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-11-07 02:00:04,407 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 66 states. [2020-11-07 02:00:08,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:08,285 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2020-11-07 02:00:08,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-11-07 02:00:08,286 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 177 [2020-11-07 02:00:08,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:08,288 INFO L225 Difference]: With dead ends: 193 [2020-11-07 02:00:08,288 INFO L226 Difference]: Without dead ends: 186 [2020-11-07 02:00:08,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-11-07 02:00:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-07 02:00:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2020-11-07 02:00:08,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-11-07 02:00:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2020-11-07 02:00:08,298 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 177 [2020-11-07 02:00:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:08,298 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2020-11-07 02:00:08,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-11-07 02:00:08,298 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2020-11-07 02:00:08,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-11-07 02:00:08,299 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:08,300 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 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 02:00:08,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 02:00:08,300 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:08,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:08,300 INFO L82 PathProgramCache]: Analyzing trace with hash 97709116, now seen corresponding path program 32 times [2020-11-07 02:00:08,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:08,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141842949] [2020-11-07 02:00:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:08,351 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:08,352 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:10,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:10,945 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 02:00:10,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141842949] [2020-11-07 02:00:10,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:10,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-11-07 02:00:10,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103703062] [2020-11-07 02:00:10,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-11-07 02:00:10,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:10,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-11-07 02:00:10,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 02:00:10,947 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 68 states. [2020-11-07 02:00:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:15,250 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2020-11-07 02:00:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-11-07 02:00:15,251 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 182 [2020-11-07 02:00:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:15,252 INFO L225 Difference]: With dead ends: 198 [2020-11-07 02:00:15,253 INFO L226 Difference]: Without dead ends: 191 [2020-11-07 02:00:15,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-11-07 02:00:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-11-07 02:00:15,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2020-11-07 02:00:15,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-11-07 02:00:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2020-11-07 02:00:15,264 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 182 [2020-11-07 02:00:15,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:15,264 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2020-11-07 02:00:15,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-11-07 02:00:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2020-11-07 02:00:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-11-07 02:00:15,265 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:15,266 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 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 02:00:15,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 02:00:15,266 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:15,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:15,266 INFO L82 PathProgramCache]: Analyzing trace with hash 556588468, now seen corresponding path program 33 times [2020-11-07 02:00:15,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:15,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186403655] [2020-11-07 02:00:15,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:15,325 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:15,326 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:18,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:18,194 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 02:00:18,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186403655] [2020-11-07 02:00:18,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:18,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2020-11-07 02:00:18,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142741114] [2020-11-07 02:00:18,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-11-07 02:00:18,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:18,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-11-07 02:00:18,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 02:00:18,196 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 70 states. [2020-11-07 02:00:22,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:22,667 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2020-11-07 02:00:22,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-11-07 02:00:22,668 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 187 [2020-11-07 02:00:22,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:22,670 INFO L225 Difference]: With dead ends: 203 [2020-11-07 02:00:22,670 INFO L226 Difference]: Without dead ends: 196 [2020-11-07 02:00:22,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-11-07 02:00:22,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-11-07 02:00:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2020-11-07 02:00:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-11-07 02:00:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2020-11-07 02:00:22,686 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 187 [2020-11-07 02:00:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:22,686 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2020-11-07 02:00:22,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-11-07 02:00:22,686 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2020-11-07 02:00:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-11-07 02:00:22,687 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:22,688 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 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 02:00:22,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 02:00:22,688 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:22,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:22,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1109858108, now seen corresponding path program 34 times [2020-11-07 02:00:22,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:22,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113645471] [2020-11-07 02:00:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:22,746 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:22,747 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:25,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:25,766 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 02:00:25,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113645471] [2020-11-07 02:00:25,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:25,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-11-07 02:00:25,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187218057] [2020-11-07 02:00:25,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-11-07 02:00:25,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:25,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-11-07 02:00:25,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 02:00:25,767 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 72 states. [2020-11-07 02:00:30,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:30,413 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2020-11-07 02:00:30,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-11-07 02:00:30,414 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 192 [2020-11-07 02:00:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:30,416 INFO L225 Difference]: With dead ends: 208 [2020-11-07 02:00:30,417 INFO L226 Difference]: Without dead ends: 201 [2020-11-07 02:00:30,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-11-07 02:00:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-07 02:00:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-11-07 02:00:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-11-07 02:00:30,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2020-11-07 02:00:30,426 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 192 [2020-11-07 02:00:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:30,426 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2020-11-07 02:00:30,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-11-07 02:00:30,427 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2020-11-07 02:00:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-11-07 02:00:30,428 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:30,428 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 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 02:00:30,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 02:00:30,428 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:30,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:30,429 INFO L82 PathProgramCache]: Analyzing trace with hash -642018636, now seen corresponding path program 35 times [2020-11-07 02:00:30,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:30,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655106172] [2020-11-07 02:00:30,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:30,481 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:30,482 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:33,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:33,663 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 02:00:33,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655106172] [2020-11-07 02:00:33,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:33,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2020-11-07 02:00:33,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438680217] [2020-11-07 02:00:33,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-11-07 02:00:33,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:33,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-11-07 02:00:33,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-11-07 02:00:33,666 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 74 states. [2020-11-07 02:00:38,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:38,654 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2020-11-07 02:00:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-11-07 02:00:38,655 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 197 [2020-11-07 02:00:38,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:38,656 INFO L225 Difference]: With dead ends: 213 [2020-11-07 02:00:38,657 INFO L226 Difference]: Without dead ends: 206 [2020-11-07 02:00:38,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-11-07 02:00:38,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-11-07 02:00:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2020-11-07 02:00:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-11-07 02:00:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2020-11-07 02:00:38,664 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 197 [2020-11-07 02:00:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:38,665 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2020-11-07 02:00:38,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-11-07 02:00:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2020-11-07 02:00:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-11-07 02:00:38,666 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:38,666 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 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 02:00:38,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 02:00:38,666 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:38,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1887337924, now seen corresponding path program 36 times [2020-11-07 02:00:38,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:38,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389311778] [2020-11-07 02:00:38,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:38,726 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:38,727 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:42,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:42,149 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 02:00:42,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389311778] [2020-11-07 02:00:42,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:42,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2020-11-07 02:00:42,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688384927] [2020-11-07 02:00:42,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-11-07 02:00:42,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:42,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-11-07 02:00:42,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 02:00:42,152 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 76 states. [2020-11-07 02:00:47,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:47,612 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2020-11-07 02:00:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-11-07 02:00:47,613 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 202 [2020-11-07 02:00:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:47,615 INFO L225 Difference]: With dead ends: 218 [2020-11-07 02:00:47,615 INFO L226 Difference]: Without dead ends: 211 [2020-11-07 02:00:47,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-11-07 02:00:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-11-07 02:00:47,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-11-07 02:00:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-11-07 02:00:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2020-11-07 02:00:47,624 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 202 [2020-11-07 02:00:47,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:47,625 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2020-11-07 02:00:47,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-11-07 02:00:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2020-11-07 02:00:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-11-07 02:00:47,626 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:47,626 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 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 02:00:47,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 02:00:47,626 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:47,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1798047668, now seen corresponding path program 37 times [2020-11-07 02:00:47,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:47,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408504316] [2020-11-07 02:00:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:47,682 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:47,683 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:51,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:51,268 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 02:00:51,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408504316] [2020-11-07 02:00:51,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:51,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2020-11-07 02:00:51,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459614120] [2020-11-07 02:00:51,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-11-07 02:00:51,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:51,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-11-07 02:00:51,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-11-07 02:00:51,270 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 78 states. [2020-11-07 02:00:57,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:57,129 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2020-11-07 02:00:57,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-11-07 02:00:57,130 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 207 [2020-11-07 02:00:57,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:57,132 INFO L225 Difference]: With dead ends: 223 [2020-11-07 02:00:57,132 INFO L226 Difference]: Without dead ends: 216 [2020-11-07 02:00:57,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-11-07 02:00:57,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-11-07 02:00:57,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2020-11-07 02:00:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-11-07 02:00:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2020-11-07 02:00:57,140 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 207 [2020-11-07 02:00:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:57,141 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2020-11-07 02:00:57,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-11-07 02:00:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2020-11-07 02:00:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-11-07 02:00:57,142 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:57,142 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 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 02:00:57,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 02:00:57,142 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:57,143 INFO L82 PathProgramCache]: Analyzing trace with hash 185740604, now seen corresponding path program 38 times [2020-11-07 02:00:57,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:57,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494206268] [2020-11-07 02:00:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:57,199 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:57,200 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:01,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:01,072 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 02:01:01,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494206268] [2020-11-07 02:01:01,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:01,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2020-11-07 02:01:01,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354630929] [2020-11-07 02:01:01,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-11-07 02:01:01,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:01,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-11-07 02:01:01,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 02:01:01,074 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 80 states. [2020-11-07 02:01:07,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:07,314 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2020-11-07 02:01:07,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-11-07 02:01:07,315 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 212 [2020-11-07 02:01:07,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:07,317 INFO L225 Difference]: With dead ends: 228 [2020-11-07 02:01:07,317 INFO L226 Difference]: Without dead ends: 221 [2020-11-07 02:01:07,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-11-07 02:01:07,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-11-07 02:01:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2020-11-07 02:01:07,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-11-07 02:01:07,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2020-11-07 02:01:07,324 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 212 [2020-11-07 02:01:07,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:07,324 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2020-11-07 02:01:07,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-11-07 02:01:07,324 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2020-11-07 02:01:07,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-11-07 02:01:07,325 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:07,326 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 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 02:01:07,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 02:01:07,326 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:07,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:07,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1984838836, now seen corresponding path program 39 times [2020-11-07 02:01:07,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:07,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587114859] [2020-11-07 02:01:07,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:07,379 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:07,381 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:11,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:11,497 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 02:01:11,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587114859] [2020-11-07 02:01:11,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:11,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2020-11-07 02:01:11,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141980721] [2020-11-07 02:01:11,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-11-07 02:01:11,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:11,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-11-07 02:01:11,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-11-07 02:01:11,499 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 82 states. [2020-11-07 02:01:18,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:18,007 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2020-11-07 02:01:18,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-11-07 02:01:18,008 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 217 [2020-11-07 02:01:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:18,010 INFO L225 Difference]: With dead ends: 233 [2020-11-07 02:01:18,010 INFO L226 Difference]: Without dead ends: 226 [2020-11-07 02:01:18,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-11-07 02:01:18,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-07 02:01:18,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2020-11-07 02:01:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-11-07 02:01:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2020-11-07 02:01:18,018 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 217 [2020-11-07 02:01:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:18,018 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2020-11-07 02:01:18,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-11-07 02:01:18,018 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2020-11-07 02:01:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-11-07 02:01:18,019 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:18,019 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 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 02:01:18,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 02:01:18,019 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:18,020 INFO L82 PathProgramCache]: Analyzing trace with hash 369694780, now seen corresponding path program 40 times [2020-11-07 02:01:18,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:18,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438438380] [2020-11-07 02:01:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:18,078 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:18,080 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:22,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:22,448 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 02:01:22,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438438380] [2020-11-07 02:01:22,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:22,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2020-11-07 02:01:22,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367141443] [2020-11-07 02:01:22,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-11-07 02:01:22,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:22,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-11-07 02:01:22,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 02:01:22,450 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 84 states. [2020-11-07 02:01:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:29,375 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2020-11-07 02:01:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-11-07 02:01:29,376 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 222 [2020-11-07 02:01:29,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:29,378 INFO L225 Difference]: With dead ends: 238 [2020-11-07 02:01:29,378 INFO L226 Difference]: Without dead ends: 231 [2020-11-07 02:01:29,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-11-07 02:01:29,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-11-07 02:01:29,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 228. [2020-11-07 02:01:29,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-11-07 02:01:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2020-11-07 02:01:29,386 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 222 [2020-11-07 02:01:29,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:29,386 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2020-11-07 02:01:29,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-11-07 02:01:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2020-11-07 02:01:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-11-07 02:01:29,387 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:29,387 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 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 02:01:29,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 02:01:29,387 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:29,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:29,388 INFO L82 PathProgramCache]: Analyzing trace with hash -671993420, now seen corresponding path program 41 times [2020-11-07 02:01:29,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:29,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160910001] [2020-11-07 02:01:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:29,443 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:29,444 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:33,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:34,035 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 02:01:34,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160910001] [2020-11-07 02:01:34,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:34,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2020-11-07 02:01:34,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482018997] [2020-11-07 02:01:34,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-11-07 02:01:34,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:34,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-11-07 02:01:34,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-11-07 02:01:34,037 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 86 states. [2020-11-07 02:01:41,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:41,435 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2020-11-07 02:01:41,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-11-07 02:01:41,436 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 227 [2020-11-07 02:01:41,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:41,438 INFO L225 Difference]: With dead ends: 243 [2020-11-07 02:01:41,438 INFO L226 Difference]: Without dead ends: 236 [2020-11-07 02:01:41,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-11-07 02:01:41,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-11-07 02:01:41,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2020-11-07 02:01:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-11-07 02:01:41,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2020-11-07 02:01:41,448 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 227 [2020-11-07 02:01:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:41,448 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2020-11-07 02:01:41,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-11-07 02:01:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2020-11-07 02:01:41,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-11-07 02:01:41,450 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:41,450 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 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 02:01:41,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 02:01:41,450 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:41,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:41,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1435910972, now seen corresponding path program 42 times [2020-11-07 02:01:41,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:41,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181673748] [2020-11-07 02:01:41,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:41,512 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:41,514 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:46,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:46,449 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 02:01:46,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181673748] [2020-11-07 02:01:46,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:46,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2020-11-07 02:01:46,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559342471] [2020-11-07 02:01:46,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-11-07 02:01:46,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:46,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-11-07 02:01:46,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-11-07 02:01:46,451 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 88 states. [2020-11-07 02:01:54,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:54,060 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2020-11-07 02:01:54,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-11-07 02:01:54,061 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 232 [2020-11-07 02:01:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:54,063 INFO L225 Difference]: With dead ends: 248 [2020-11-07 02:01:54,063 INFO L226 Difference]: Without dead ends: 241 [2020-11-07 02:01:54,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-11-07 02:01:54,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-11-07 02:01:54,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 238. [2020-11-07 02:01:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-11-07 02:01:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2020-11-07 02:01:54,074 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 232 [2020-11-07 02:01:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:54,074 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2020-11-07 02:01:54,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-11-07 02:01:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2020-11-07 02:01:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-11-07 02:01:54,076 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:54,076 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 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 02:01:54,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 02:01:54,076 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:54,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:54,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1461197132, now seen corresponding path program 43 times [2020-11-07 02:01:54,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:54,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667042774] [2020-11-07 02:01:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:54,142 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:54,143 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:59,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:59,380 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 02:01:59,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667042774] [2020-11-07 02:01:59,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:59,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2020-11-07 02:01:59,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633799122] [2020-11-07 02:01:59,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-11-07 02:01:59,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:59,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-11-07 02:01:59,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-11-07 02:01:59,382 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 90 states. [2020-11-07 02:02:07,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:02:07,667 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2020-11-07 02:02:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-11-07 02:02:07,668 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 237 [2020-11-07 02:02:07,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:02:07,670 INFO L225 Difference]: With dead ends: 253 [2020-11-07 02:02:07,670 INFO L226 Difference]: Without dead ends: 246 [2020-11-07 02:02:07,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-11-07 02:02:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-11-07 02:02:07,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-11-07 02:02:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-11-07 02:02:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2020-11-07 02:02:07,680 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 237 [2020-11-07 02:02:07,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:02:07,681 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2020-11-07 02:02:07,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-11-07 02:02:07,681 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2020-11-07 02:02:07,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-11-07 02:02:07,682 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:02:07,682 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 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 02:02:07,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 02:02:07,683 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:02:07,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:02:07,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1293308356, now seen corresponding path program 44 times [2020-11-07 02:02:07,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:02:07,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282252438] [2020-11-07 02:02:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:02:07,749 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:02:07,750 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:02:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:13,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:02:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:13,271 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 02:02:13,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282252438] [2020-11-07 02:02:13,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:02:13,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2020-11-07 02:02:13,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191449597] [2020-11-07 02:02:13,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-11-07 02:02:13,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:02:13,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-11-07 02:02:13,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-11-07 02:02:13,274 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 92 states. [2020-11-07 02:02:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:02:22,048 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2020-11-07 02:02:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-11-07 02:02:22,049 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 242 [2020-11-07 02:02:22,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:02:22,051 INFO L225 Difference]: With dead ends: 258 [2020-11-07 02:02:22,052 INFO L226 Difference]: Without dead ends: 251 [2020-11-07 02:02:22,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-11-07 02:02:22,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-11-07 02:02:22,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 248. [2020-11-07 02:02:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-11-07 02:02:22,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2020-11-07 02:02:22,062 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 242 [2020-11-07 02:02:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:02:22,062 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2020-11-07 02:02:22,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-11-07 02:02:22,062 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2020-11-07 02:02:22,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-11-07 02:02:22,064 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:02:22,064 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 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 02:02:22,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 02:02:22,064 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:02:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:02:22,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1040145332, now seen corresponding path program 45 times [2020-11-07 02:02:22,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:02:22,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151353537] [2020-11-07 02:02:22,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:02:22,126 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:02:22,128 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:02:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:27,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:02:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:27,970 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 02:02:27,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151353537] [2020-11-07 02:02:27,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:02:27,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2020-11-07 02:02:27,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107160726] [2020-11-07 02:02:27,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-11-07 02:02:27,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:02:27,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-11-07 02:02:27,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-11-07 02:02:27,973 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 94 states. [2020-11-07 02:02:37,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:02:37,236 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2020-11-07 02:02:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-11-07 02:02:37,238 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 247 [2020-11-07 02:02:37,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:02:37,239 INFO L225 Difference]: With dead ends: 263 [2020-11-07 02:02:37,240 INFO L226 Difference]: Without dead ends: 256 [2020-11-07 02:02:37,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-11-07 02:02:37,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-11-07 02:02:37,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 253. [2020-11-07 02:02:37,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-11-07 02:02:37,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2020-11-07 02:02:37,249 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 247 [2020-11-07 02:02:37,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:02:37,249 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2020-11-07 02:02:37,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-11-07 02:02:37,249 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2020-11-07 02:02:37,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-11-07 02:02:37,258 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:02:37,258 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 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 02:02:37,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 02:02:37,259 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:02:37,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:02:37,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1530091836, now seen corresponding path program 46 times [2020-11-07 02:02:37,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:02:37,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739559075] [2020-11-07 02:02:37,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:02:37,315 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:02:37,316 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:02:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:43,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:02:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:43,525 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 02:02:43,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739559075] [2020-11-07 02:02:43,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:02:43,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2020-11-07 02:02:43,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773242712] [2020-11-07 02:02:43,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-11-07 02:02:43,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:02:43,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-11-07 02:02:43,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-11-07 02:02:43,527 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 96 states. [2020-11-07 02:02:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:02:53,072 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2020-11-07 02:02:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-11-07 02:02:53,073 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 252 [2020-11-07 02:02:53,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:02:53,078 INFO L225 Difference]: With dead ends: 268 [2020-11-07 02:02:53,078 INFO L226 Difference]: Without dead ends: 261 [2020-11-07 02:02:53,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-11-07 02:02:53,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-11-07 02:02:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2020-11-07 02:02:53,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-11-07 02:02:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 258 transitions. [2020-11-07 02:02:53,098 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 258 transitions. Word has length 252 [2020-11-07 02:02:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:02:53,099 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 258 transitions. [2020-11-07 02:02:53,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-11-07 02:02:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 258 transitions. [2020-11-07 02:02:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-11-07 02:02:53,100 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:02:53,100 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 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 02:02:53,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 02:02:53,101 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:02:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:02:53,101 INFO L82 PathProgramCache]: Analyzing trace with hash 671649972, now seen corresponding path program 47 times [2020-11-07 02:02:53,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:02:53,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075152244] [2020-11-07 02:02:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:02:53,163 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:02:53,164 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:02:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:59,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:02:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:59,807 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 02:02:59,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075152244] [2020-11-07 02:02:59,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:02:59,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2020-11-07 02:02:59,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139706706] [2020-11-07 02:02:59,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-11-07 02:02:59,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:02:59,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-11-07 02:02:59,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-11-07 02:02:59,809 INFO L87 Difference]: Start difference. First operand 258 states and 258 transitions. Second operand 98 states. [2020-11-07 02:03:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:03:10,643 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2020-11-07 02:03:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-11-07 02:03:10,645 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 257 [2020-11-07 02:03:10,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:03:10,647 INFO L225 Difference]: With dead ends: 273 [2020-11-07 02:03:10,647 INFO L226 Difference]: Without dead ends: 266 [2020-11-07 02:03:10,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-11-07 02:03:10,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-11-07 02:03:10,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 263. [2020-11-07 02:03:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-11-07 02:03:10,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2020-11-07 02:03:10,655 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 257 [2020-11-07 02:03:10,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:03:10,655 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2020-11-07 02:03:10,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-11-07 02:03:10,656 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2020-11-07 02:03:10,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-11-07 02:03:10,657 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:03:10,657 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 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 02:03:10,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-07 02:03:10,657 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:03:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:03:10,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1079819204, now seen corresponding path program 48 times [2020-11-07 02:03:10,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:03:10,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610264857] [2020-11-07 02:03:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:03:10,715 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:03:10,716 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:03:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:17,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:03:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:17,964 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 02:03:17,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610264857] [2020-11-07 02:03:17,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:03:17,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2020-11-07 02:03:17,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106927914] [2020-11-07 02:03:17,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-11-07 02:03:17,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:03:17,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-11-07 02:03:17,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-11-07 02:03:17,967 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 100 states. [2020-11-07 02:03:29,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:03:29,063 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2020-11-07 02:03:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-11-07 02:03:29,065 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 262 [2020-11-07 02:03:29,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:03:29,067 INFO L225 Difference]: With dead ends: 278 [2020-11-07 02:03:29,067 INFO L226 Difference]: Without dead ends: 271 [2020-11-07 02:03:29,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-11-07 02:03:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-11-07 02:03:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 268. [2020-11-07 02:03:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-11-07 02:03:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2020-11-07 02:03:29,077 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 262 [2020-11-07 02:03:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:03:29,078 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2020-11-07 02:03:29,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-11-07 02:03:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2020-11-07 02:03:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-11-07 02:03:29,079 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:03:29,079 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 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 02:03:29,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-07 02:03:29,080 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:03:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:03:29,080 INFO L82 PathProgramCache]: Analyzing trace with hash 869500340, now seen corresponding path program 49 times [2020-11-07 02:03:29,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:03:29,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404959932] [2020-11-07 02:03:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:03:29,147 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:03:29,148 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:03:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:36,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:03:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:36,788 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 02:03:36,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404959932] [2020-11-07 02:03:36,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:03:36,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2020-11-07 02:03:36,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990685324] [2020-11-07 02:03:36,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-11-07 02:03:36,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:03:36,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-11-07 02:03:36,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-11-07 02:03:36,790 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 102 states. [2020-11-07 02:03:48,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:03:48,916 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2020-11-07 02:03:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-11-07 02:03:48,917 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 267 [2020-11-07 02:03:48,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:03:48,920 INFO L225 Difference]: With dead ends: 283 [2020-11-07 02:03:48,920 INFO L226 Difference]: Without dead ends: 276 [2020-11-07 02:03:48,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-11-07 02:03:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-11-07 02:03:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 273. [2020-11-07 02:03:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-11-07 02:03:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2020-11-07 02:03:48,931 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 267 [2020-11-07 02:03:48,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:03:48,932 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2020-11-07 02:03:48,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-11-07 02:03:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2020-11-07 02:03:48,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-11-07 02:03:48,935 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:03:48,936 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 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 02:03:48,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-07 02:03:48,937 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:03:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:03:48,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1788252356, now seen corresponding path program 50 times [2020-11-07 02:03:48,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:03:48,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245221572] [2020-11-07 02:03:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:03:49,006 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:03:49,008 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:03:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:56,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:03:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:57,048 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 02:03:57,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245221572] [2020-11-07 02:03:57,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:03:57,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2020-11-07 02:03:57,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844396417] [2020-11-07 02:03:57,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-11-07 02:03:57,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:03:57,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-11-07 02:03:57,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-11-07 02:03:57,051 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 104 states. [2020-11-07 02:04:09,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:04:09,500 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2020-11-07 02:04:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-11-07 02:04:09,501 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 272 [2020-11-07 02:04:09,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:04:09,504 INFO L225 Difference]: With dead ends: 288 [2020-11-07 02:04:09,504 INFO L226 Difference]: Without dead ends: 281 [2020-11-07 02:04:09,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-11-07 02:04:09,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-11-07 02:04:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 278. [2020-11-07 02:04:09,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-11-07 02:04:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 278 transitions. [2020-11-07 02:04:09,515 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 278 transitions. Word has length 272 [2020-11-07 02:04:09,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:04:09,515 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 278 transitions. [2020-11-07 02:04:09,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-11-07 02:04:09,515 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 278 transitions. [2020-11-07 02:04:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-11-07 02:04:09,517 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:04:09,517 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 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 02:04:09,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-07 02:04:09,517 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:04:09,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:04:09,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1781545652, now seen corresponding path program 51 times [2020-11-07 02:04:09,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:04:09,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205190440] [2020-11-07 02:04:09,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:04:09,603 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:04:09,604 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:04:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:18,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:04:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:18,155 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 02:04:18,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205190440] [2020-11-07 02:04:18,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:04:18,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2020-11-07 02:04:18,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042831189] [2020-11-07 02:04:18,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-11-07 02:04:18,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:04:18,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-11-07 02:04:18,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-11-07 02:04:18,157 INFO L87 Difference]: Start difference. First operand 278 states and 278 transitions. Second operand 106 states. [2020-11-07 02:04:31,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:04:31,790 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2020-11-07 02:04:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-11-07 02:04:31,792 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 277 [2020-11-07 02:04:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:04:31,794 INFO L225 Difference]: With dead ends: 293 [2020-11-07 02:04:31,794 INFO L226 Difference]: Without dead ends: 286 [2020-11-07 02:04:31,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-11-07 02:04:31,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-11-07 02:04:31,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 283. [2020-11-07 02:04:31,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-11-07 02:04:31,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2020-11-07 02:04:31,803 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 277 [2020-11-07 02:04:31,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:04:31,803 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2020-11-07 02:04:31,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-11-07 02:04:31,803 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2020-11-07 02:04:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-11-07 02:04:31,805 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:04:31,805 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 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 02:04:31,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-07 02:04:31,805 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:04:31,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:04:31,806 INFO L82 PathProgramCache]: Analyzing trace with hash -709502404, now seen corresponding path program 52 times [2020-11-07 02:04:31,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:04:31,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803254918] [2020-11-07 02:04:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:04:31,873 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:04:31,874 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:04:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:40,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:04:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:40,991 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 02:04:40,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803254918] [2020-11-07 02:04:40,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:04:40,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2020-11-07 02:04:40,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256001745] [2020-11-07 02:04:40,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-11-07 02:04:40,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:04:40,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-11-07 02:04:40,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-11-07 02:04:40,993 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 108 states. [2020-11-07 02:04:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:04:55,395 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2020-11-07 02:04:55,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-11-07 02:04:55,396 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 282 [2020-11-07 02:04:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:04:55,398 INFO L225 Difference]: With dead ends: 298 [2020-11-07 02:04:55,398 INFO L226 Difference]: Without dead ends: 291 [2020-11-07 02:04:55,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-11-07 02:04:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-11-07 02:04:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 288. [2020-11-07 02:04:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-11-07 02:04:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 288 transitions. [2020-11-07 02:04:55,407 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 288 transitions. Word has length 282 [2020-11-07 02:04:55,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:04:55,407 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 288 transitions. [2020-11-07 02:04:55,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-11-07 02:04:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 288 transitions. [2020-11-07 02:04:55,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-11-07 02:04:55,408 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:04:55,409 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 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 02:04:55,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-11-07 02:04:55,409 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:04:55,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:04:55,409 INFO L82 PathProgramCache]: Analyzing trace with hash 267300788, now seen corresponding path program 53 times [2020-11-07 02:04:55,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:04:55,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611788393] [2020-11-07 02:04:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:04:55,487 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:04:55,488 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:04:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:05,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:05,271 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 02:05:05,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611788393] [2020-11-07 02:05:05,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:05,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2020-11-07 02:05:05,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963554771] [2020-11-07 02:05:05,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-11-07 02:05:05,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:05,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-11-07 02:05:05,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-11-07 02:05:05,273 INFO L87 Difference]: Start difference. First operand 288 states and 288 transitions. Second operand 110 states. [2020-11-07 02:05:20,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:20,435 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2020-11-07 02:05:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-11-07 02:05:20,437 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 287 [2020-11-07 02:05:20,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:20,439 INFO L225 Difference]: With dead ends: 303 [2020-11-07 02:05:20,439 INFO L226 Difference]: Without dead ends: 296 [2020-11-07 02:05:20,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-11-07 02:05:20,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-11-07 02:05:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 293. [2020-11-07 02:05:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-11-07 02:05:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2020-11-07 02:05:20,449 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 287 [2020-11-07 02:05:20,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:20,450 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2020-11-07 02:05:20,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-11-07 02:05:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2020-11-07 02:05:20,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-11-07 02:05:20,451 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:20,452 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 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 02:05:20,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-11-07 02:05:20,452 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:20,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:20,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1111980740, now seen corresponding path program 54 times [2020-11-07 02:05:20,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:20,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571916376] [2020-11-07 02:05:20,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:20,547 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:05:20,548 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:30,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:30,996 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 02:05:30,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571916376] [2020-11-07 02:05:30,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:30,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2020-11-07 02:05:30,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456021579] [2020-11-07 02:05:30,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-11-07 02:05:30,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:30,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-11-07 02:05:30,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-11-07 02:05:30,999 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 112 states. [2020-11-07 02:05:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:47,574 INFO L93 Difference]: Finished difference Result 308 states and 308 transitions. [2020-11-07 02:05:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-11-07 02:05:47,576 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 292 [2020-11-07 02:05:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:47,578 INFO L225 Difference]: With dead ends: 308 [2020-11-07 02:05:47,578 INFO L226 Difference]: Without dead ends: 301 [2020-11-07 02:05:47,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-11-07 02:05:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-11-07 02:05:47,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2020-11-07 02:05:47,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-11-07 02:05:47,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 298 transitions. [2020-11-07 02:05:47,591 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 298 transitions. Word has length 292 [2020-11-07 02:05:47,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:47,592 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 298 transitions. [2020-11-07 02:05:47,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-11-07 02:05:47,592 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 298 transitions. [2020-11-07 02:05:47,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-11-07 02:05:47,593 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:47,594 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 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 02:05:47,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-11-07 02:05:47,594 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:47,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:47,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1512119116, now seen corresponding path program 55 times [2020-11-07 02:05:47,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:47,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742963819] [2020-11-07 02:05:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:47,684 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:05:47,686 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:58,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:58,937 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 02:05:58,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742963819] [2020-11-07 02:05:58,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:58,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2020-11-07 02:05:58,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902327515] [2020-11-07 02:05:58,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-11-07 02:05:58,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:58,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-11-07 02:05:58,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-11-07 02:05:58,939 INFO L87 Difference]: Start difference. First operand 298 states and 298 transitions. Second operand 114 states. [2020-11-07 02:06:16,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:16,372 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2020-11-07 02:06:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-11-07 02:06:16,374 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 297 [2020-11-07 02:06:16,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:16,376 INFO L225 Difference]: With dead ends: 313 [2020-11-07 02:06:16,376 INFO L226 Difference]: Without dead ends: 306 [2020-11-07 02:06:16,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-11-07 02:06:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-11-07 02:06:16,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 303. [2020-11-07 02:06:16,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-11-07 02:06:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2020-11-07 02:06:16,385 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 297 [2020-11-07 02:06:16,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:16,385 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2020-11-07 02:06:16,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-11-07 02:06:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2020-11-07 02:06:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-11-07 02:06:16,386 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:16,387 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 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 02:06:16,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-11-07 02:06:16,387 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:16,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:16,387 INFO L82 PathProgramCache]: Analyzing trace with hash -828280772, now seen corresponding path program 56 times [2020-11-07 02:06:16,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:16,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880626015] [2020-11-07 02:06:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:16,486 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:06:16,488 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:06:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:28,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:06:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:28,566 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 02:06:28,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880626015] [2020-11-07 02:06:28,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:06:28,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2020-11-07 02:06:28,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243872160] [2020-11-07 02:06:28,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-11-07 02:06:28,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:06:28,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-11-07 02:06:28,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-11-07 02:06:28,568 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 116 states. [2020-11-07 02:06:47,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:47,407 INFO L93 Difference]: Finished difference Result 318 states and 318 transitions. [2020-11-07 02:06:47,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-11-07 02:06:47,409 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 302 [2020-11-07 02:06:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:47,411 INFO L225 Difference]: With dead ends: 318 [2020-11-07 02:06:47,411 INFO L226 Difference]: Without dead ends: 311 [2020-11-07 02:06:47,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-11-07 02:06:47,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-11-07 02:06:47,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 308. [2020-11-07 02:06:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-11-07 02:06:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 308 transitions. [2020-11-07 02:06:47,421 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 308 transitions. Word has length 302 [2020-11-07 02:06:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:47,422 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 308 transitions. [2020-11-07 02:06:47,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-11-07 02:06:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 308 transitions. [2020-11-07 02:06:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-11-07 02:06:47,424 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:47,424 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 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 02:06:47,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-11-07 02:06:47,424 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:47,425 INFO L82 PathProgramCache]: Analyzing trace with hash -388965964, now seen corresponding path program 57 times [2020-11-07 02:06:47,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:47,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125697324] [2020-11-07 02:06:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:47,525 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:06:47,526 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:06:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:00,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:07:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:00,381 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 02:07:00,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125697324] [2020-11-07 02:07:00,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:07:00,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2020-11-07 02:07:00,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714744670] [2020-11-07 02:07:00,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-11-07 02:07:00,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:07:00,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-11-07 02:07:00,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-11-07 02:07:00,383 INFO L87 Difference]: Start difference. First operand 308 states and 308 transitions. Second operand 118 states. [2020-11-07 02:07:20,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:07:20,762 INFO L93 Difference]: Finished difference Result 323 states and 323 transitions. [2020-11-07 02:07:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-11-07 02:07:20,764 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 307 [2020-11-07 02:07:20,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:07:20,766 INFO L225 Difference]: With dead ends: 323 [2020-11-07 02:07:20,766 INFO L226 Difference]: Without dead ends: 316 [2020-11-07 02:07:20,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-11-07 02:07:20,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-11-07 02:07:20,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 313. [2020-11-07 02:07:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-11-07 02:07:20,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 313 transitions. [2020-11-07 02:07:20,777 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 313 transitions. Word has length 307 [2020-11-07 02:07:20,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:07:20,777 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 313 transitions. [2020-11-07 02:07:20,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-11-07 02:07:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 313 transitions. [2020-11-07 02:07:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-11-07 02:07:20,779 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:07:20,779 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 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 02:07:20,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-11-07 02:07:20,780 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:07:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:07:20,780 INFO L82 PathProgramCache]: Analyzing trace with hash -845112516, now seen corresponding path program 58 times [2020-11-07 02:07:20,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:07:20,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049721785] [2020-11-07 02:07:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:07:20,897 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:07:20,899 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:07:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:34,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:07:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:34,786 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 02:07:34,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049721785] [2020-11-07 02:07:34,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:07:34,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2020-11-07 02:07:34,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972406937] [2020-11-07 02:07:34,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-11-07 02:07:34,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:07:34,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-11-07 02:07:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-11-07 02:07:34,788 INFO L87 Difference]: Start difference. First operand 313 states and 313 transitions. Second operand 120 states. [2020-11-07 02:07:56,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:07:56,649 INFO L93 Difference]: Finished difference Result 328 states and 328 transitions. [2020-11-07 02:07:56,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-11-07 02:07:56,651 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 312 [2020-11-07 02:07:56,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:07:56,654 INFO L225 Difference]: With dead ends: 328 [2020-11-07 02:07:56,654 INFO L226 Difference]: Without dead ends: 321 [2020-11-07 02:07:56,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-11-07 02:07:56,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-11-07 02:07:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2020-11-07 02:07:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-07 02:07:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 318 transitions. [2020-11-07 02:07:56,667 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 318 transitions. Word has length 312 [2020-11-07 02:07:56,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:07:56,667 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 318 transitions. [2020-11-07 02:07:56,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-11-07 02:07:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 318 transitions. [2020-11-07 02:07:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-11-07 02:07:56,669 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:07:56,669 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 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 02:07:56,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-11-07 02:07:56,669 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:07:56,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:07:56,670 INFO L82 PathProgramCache]: Analyzing trace with hash -778793292, now seen corresponding path program 59 times [2020-11-07 02:07:56,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:07:56,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997068925] [2020-11-07 02:07:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:07:56,784 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:07:56,785 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:07:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:11,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:12,071 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 02:08:12,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997068925] [2020-11-07 02:08:12,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:12,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2020-11-07 02:08:12,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260841326] [2020-11-07 02:08:12,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-11-07 02:08:12,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:12,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-11-07 02:08:12,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2020-11-07 02:08:12,073 INFO L87 Difference]: Start difference. First operand 318 states and 318 transitions. Second operand 122 states. [2020-11-07 02:08:35,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:35,760 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2020-11-07 02:08:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-11-07 02:08:35,762 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 317 [2020-11-07 02:08:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:35,764 INFO L225 Difference]: With dead ends: 333 [2020-11-07 02:08:35,765 INFO L226 Difference]: Without dead ends: 326 [2020-11-07 02:08:35,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10442 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=18000, Invalid=39360, Unknown=0, NotChecked=0, Total=57360 [2020-11-07 02:08:35,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-11-07 02:08:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 323. [2020-11-07 02:08:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-11-07 02:08:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2020-11-07 02:08:35,774 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 317 [2020-11-07 02:08:35,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:35,774 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2020-11-07 02:08:35,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 122 states. [2020-11-07 02:08:35,774 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2020-11-07 02:08:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-11-07 02:08:35,776 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:35,776 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 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 02:08:35,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-11-07 02:08:35,776 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:35,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:35,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1008335300, now seen corresponding path program 60 times [2020-11-07 02:08:35,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:35,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113124121] [2020-11-07 02:08:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:35,867 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:35,869 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:52,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:52,166 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 02:08:52,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113124121] [2020-11-07 02:08:52,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:52,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2020-11-07 02:08:52,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398438668] [2020-11-07 02:08:52,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 124 states [2020-11-07 02:08:52,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:52,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2020-11-07 02:08:52,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=11407, Unknown=0, NotChecked=0, Total=15252 [2020-11-07 02:08:52,168 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 124 states. [2020-11-07 02:09:17,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:17,296 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2020-11-07 02:09:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2020-11-07 02:09:17,299 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 322 [2020-11-07 02:09:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:17,301 INFO L225 Difference]: With dead ends: 338 [2020-11-07 02:09:17,301 INFO L226 Difference]: Without dead ends: 331 [2020-11-07 02:09:17,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10799 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=18605, Invalid=40687, Unknown=0, NotChecked=0, Total=59292 [2020-11-07 02:09:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-11-07 02:09:17,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 328. [2020-11-07 02:09:17,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-11-07 02:09:17,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2020-11-07 02:09:17,312 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 322 [2020-11-07 02:09:17,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:17,313 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2020-11-07 02:09:17,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 124 states. [2020-11-07 02:09:17,313 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2020-11-07 02:09:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-11-07 02:09:17,315 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:17,315 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 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 02:09:17,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-11-07 02:09:17,315 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:17,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:17,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1795554380, now seen corresponding path program 61 times [2020-11-07 02:09:17,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:17,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664219158] [2020-11-07 02:09:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:17,434 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:09:17,436 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:34,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:34,864 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 02:09:34,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664219158] [2020-11-07 02:09:34,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:34,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2020-11-07 02:09:34,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283980491] [2020-11-07 02:09:34,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 126 states [2020-11-07 02:09:34,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:34,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2020-11-07 02:09:34,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3970, Invalid=11780, Unknown=0, NotChecked=0, Total=15750 [2020-11-07 02:09:34,867 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 126 states. [2020-11-07 02:10:00,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:10:00,659 INFO L93 Difference]: Finished difference Result 343 states and 343 transitions. [2020-11-07 02:10:00,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2020-11-07 02:10:00,662 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 327 [2020-11-07 02:10:00,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:10:00,664 INFO L225 Difference]: With dead ends: 343 [2020-11-07 02:10:00,664 INFO L226 Difference]: Without dead ends: 336 [2020-11-07 02:10:00,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11162 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=19220, Invalid=42036, Unknown=0, NotChecked=0, Total=61256 [2020-11-07 02:10:00,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-11-07 02:10:00,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 333. [2020-11-07 02:10:00,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-11-07 02:10:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 333 transitions. [2020-11-07 02:10:00,675 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 333 transitions. Word has length 327 [2020-11-07 02:10:00,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:10:00,675 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 333 transitions. [2020-11-07 02:10:00,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 126 states. [2020-11-07 02:10:00,675 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 333 transitions. [2020-11-07 02:10:00,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-11-07 02:10:00,677 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:10:00,677 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 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 02:10:00,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-11-07 02:10:00,677 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:10:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:10:00,677 INFO L82 PathProgramCache]: Analyzing trace with hash -22957764, now seen corresponding path program 62 times [2020-11-07 02:10:00,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:10:00,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269342767] [2020-11-07 02:10:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:10:00,772 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:10:00,773 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:10:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:19,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:10:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:19,228 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 02:10:19,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269342767] [2020-11-07 02:10:19,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:10:19,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2020-11-07 02:10:19,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911140680] [2020-11-07 02:10:19,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 128 states [2020-11-07 02:10:19,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:10:19,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2020-11-07 02:10:19,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=12159, Unknown=0, NotChecked=0, Total=16256 [2020-11-07 02:10:19,232 INFO L87 Difference]: Start difference. First operand 333 states and 333 transitions. Second operand 128 states. [2020-11-07 02:10:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:10:47,799 INFO L93 Difference]: Finished difference Result 348 states and 348 transitions. [2020-11-07 02:10:47,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2020-11-07 02:10:47,801 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 332 [2020-11-07 02:10:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:10:47,804 INFO L225 Difference]: With dead ends: 348 [2020-11-07 02:10:47,804 INFO L226 Difference]: Without dead ends: 341 [2020-11-07 02:10:47,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11531 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=19845, Invalid=43407, Unknown=0, NotChecked=0, Total=63252 [2020-11-07 02:10:47,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-11-07 02:10:47,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 338. [2020-11-07 02:10:47,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-11-07 02:10:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 338 transitions. [2020-11-07 02:10:47,814 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 338 transitions. Word has length 332 [2020-11-07 02:10:47,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:10:47,814 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 338 transitions. [2020-11-07 02:10:47,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 128 states. [2020-11-07 02:10:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 338 transitions. [2020-11-07 02:10:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-11-07 02:10:47,816 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:10:47,816 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 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 02:10:47,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-11-07 02:10:47,817 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:10:47,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:10:47,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1546569548, now seen corresponding path program 63 times [2020-11-07 02:10:47,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:10:47,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594890155] [2020-11-07 02:10:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:10:47,916 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:10:47,918 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:10:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:07,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:07,651 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 02:11:07,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594890155] [2020-11-07 02:11:07,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:07,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2020-11-07 02:11:07,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470977001] [2020-11-07 02:11:07,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 130 states [2020-11-07 02:11:07,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:07,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2020-11-07 02:11:07,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4226, Invalid=12544, Unknown=0, NotChecked=0, Total=16770 [2020-11-07 02:11:07,655 INFO L87 Difference]: Start difference. First operand 338 states and 338 transitions. Second operand 130 states. [2020-11-07 02:11:38,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:38,195 INFO L93 Difference]: Finished difference Result 353 states and 353 transitions. [2020-11-07 02:11:38,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2020-11-07 02:11:38,198 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 337 [2020-11-07 02:11:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:38,200 INFO L225 Difference]: With dead ends: 353 [2020-11-07 02:11:38,200 INFO L226 Difference]: Without dead ends: 346 [2020-11-07 02:11:38,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11906 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=20480, Invalid=44800, Unknown=0, NotChecked=0, Total=65280 [2020-11-07 02:11:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-11-07 02:11:38,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 343. [2020-11-07 02:11:38,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-11-07 02:11:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2020-11-07 02:11:38,210 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 337 [2020-11-07 02:11:38,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:38,210 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2020-11-07 02:11:38,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 130 states. [2020-11-07 02:11:38,211 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2020-11-07 02:11:38,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-11-07 02:11:38,212 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:38,213 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 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 02:11:38,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-11-07 02:11:38,213 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:38,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:38,213 INFO L82 PathProgramCache]: Analyzing trace with hash 251894844, now seen corresponding path program 64 times [2020-11-07 02:11:38,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:38,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886377962] [2020-11-07 02:11:38,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:38,327 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:38,329 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat