/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/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:35:11,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:35:11,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:35:11,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:35:12,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:35:12,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:35:12,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:35:12,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:35:12,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:35:12,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:35:12,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:35:12,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:35:12,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:35:12,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:35:12,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:35:12,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:35:12,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:35:12,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:35:12,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:35:12,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:35:12,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:35:12,129 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:35:12,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:35:12,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:35:12,135 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:35:12,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:35:12,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:35:12,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:35:12,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:35:12,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:35:12,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:35:12,137 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:35:12,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:35:12,138 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:35:12,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:35:12,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:35:12,138 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:35:12,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:35:12,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:35:12,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:35:12,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:35:12,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:35:12,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:35:12,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:35:12,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:35:12,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:35:12,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:35:12,613 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:35:12,614 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:35:12,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-10-23 20:35:12,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8d09961e/61253fcf6b0b4e60a9ca80c1d2954c43/FLAGd0fe5edaa [2020-10-23 20:35:13,238 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:35:13,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-10-23 20:35:13,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8d09961e/61253fcf6b0b4e60a9ca80c1d2954c43/FLAGd0fe5edaa [2020-10-23 20:35:13,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8d09961e/61253fcf6b0b4e60a9ca80c1d2954c43 [2020-10-23 20:35:13,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:35:13,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:35:13,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:35:13,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:35:13,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:35:13,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:35:13" (1/1) ... [2020-10-23 20:35:13,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e59824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:13, skipping insertion in model container [2020-10-23 20:35:13,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:35:13" (1/1) ... [2020-10-23 20:35:13,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:35:13,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:35:13,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:35:13,861 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:35:13,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:35:13,901 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:35:13,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:13 WrapperNode [2020-10-23 20:35:13,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:35:13,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:35:13,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:35:13,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:35:13,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:13" (1/1) ... [2020-10-23 20:35:13,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:13" (1/1) ... [2020-10-23 20:35:13,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:13" (1/1) ... [2020-10-23 20:35:13,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:13" (1/1) ... [2020-10-23 20:35:13,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:13" (1/1) ... [2020-10-23 20:35:13,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:13" (1/1) ... [2020-10-23 20:35:13,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:13" (1/1) ... [2020-10-23 20:35:13,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:35:13,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:35:14,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:35:14,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:35:14,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:13" (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 [2020-10-23 20:35:14,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:35:14,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:35:14,092 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:35:14,092 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-23 20:35:14,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:35:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:35:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:35:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:35:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:35:14,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:35:14,094 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 20:35:14,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:35:14,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:35:14,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:35:14,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:35:14,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:35:14,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:35:14,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:35:14,526 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:35:14,526 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 20:35:14,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:35:14 BoogieIcfgContainer [2020-10-23 20:35:14,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:35:14,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:35:14,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:35:14,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:35:14,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:35:13" (1/3) ... [2020-10-23 20:35:14,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82534d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:35:14, skipping insertion in model container [2020-10-23 20:35:14,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:13" (2/3) ... [2020-10-23 20:35:14,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82534d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:35:14, skipping insertion in model container [2020-10-23 20:35:14,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:35:14" (3/3) ... [2020-10-23 20:35:14,538 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-10-23 20:35:14,551 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:35:14,556 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:35:14,570 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:35:14,596 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:35:14,596 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:35:14,596 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:35:14,596 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:35:14,597 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:35:14,597 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:35:14,597 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:35:14,597 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:35:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-10-23 20:35:14,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 20:35:14,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:14,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:14,628 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:14,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:14,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1281420821, now seen corresponding path program 1 times [2020-10-23 20:35:14,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:14,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093814481] [2020-10-23 20:35:14,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:14,725 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:14,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:14,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 20:35:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:15,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093814481] [2020-10-23 20:35:15,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:15,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 20:35:15,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817001323] [2020-10-23 20:35:15,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 20:35:15,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:15,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 20:35:15,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 20:35:15,046 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2020-10-23 20:35:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:15,348 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2020-10-23 20:35:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 20:35:15,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-10-23 20:35:15,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:15,359 INFO L225 Difference]: With dead ends: 112 [2020-10-23 20:35:15,360 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 20:35:15,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 20:35:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 20:35:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 20:35:15,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 20:35:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-23 20:35:15,419 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 43 [2020-10-23 20:35:15,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:15,420 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-23 20:35:15,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 20:35:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-23 20:35:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 20:35:15,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:15,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:15,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:35:15,424 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:15,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1979567000, now seen corresponding path program 1 times [2020-10-23 20:35:15,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:15,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845477319] [2020-10-23 20:35:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:15,430 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:15,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:15,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-23 20:35:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:15,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845477319] [2020-10-23 20:35:15,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:15,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:35:15,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797558896] [2020-10-23 20:35:15,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:35:15,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:15,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:35:15,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:35:15,571 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 4 states. [2020-10-23 20:35:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:15,742 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-23 20:35:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:35:15,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-23 20:35:15,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:15,744 INFO L225 Difference]: With dead ends: 99 [2020-10-23 20:35:15,744 INFO L226 Difference]: Without dead ends: 68 [2020-10-23 20:35:15,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:35:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-23 20:35:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2020-10-23 20:35:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-23 20:35:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-23 20:35:15,765 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 45 [2020-10-23 20:35:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:15,766 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-23 20:35:15,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:35:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-23 20:35:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-23 20:35:15,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:15,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:15,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:35:15,771 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:15,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2107402754, now seen corresponding path program 1 times [2020-10-23 20:35:15,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:15,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054049920] [2020-10-23 20:35:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:15,873 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:15,875 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:15,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:16,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-23 20:35:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:16,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054049920] [2020-10-23 20:35:16,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:16,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:35:16,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625608827] [2020-10-23 20:35:16,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:35:16,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:16,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:35:16,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:35:16,021 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 6 states. [2020-10-23 20:35:16,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:16,209 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2020-10-23 20:35:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:35:16,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-23 20:35:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:16,211 INFO L225 Difference]: With dead ends: 109 [2020-10-23 20:35:16,212 INFO L226 Difference]: Without dead ends: 78 [2020-10-23 20:35:16,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:35:16,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-23 20:35:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2020-10-23 20:35:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-23 20:35:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-23 20:35:16,226 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 55 [2020-10-23 20:35:16,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:16,227 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-23 20:35:16,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:35:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-23 20:35:16,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-23 20:35:16,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:16,230 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:16,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:35:16,230 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:16,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:16,231 INFO L82 PathProgramCache]: Analyzing trace with hash 592176924, now seen corresponding path program 2 times [2020-10-23 20:35:16,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:16,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943566897] [2020-10-23 20:35:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:16,629 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-10-23 20:35:16,923 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:16,924 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:17,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:17,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-23 20:35:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:17,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943566897] [2020-10-23 20:35:17,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:17,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:35:17,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812304332] [2020-10-23 20:35:17,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:35:17,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:17,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:35:17,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:35:17,068 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 8 states. [2020-10-23 20:35:17,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:17,312 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2020-10-23 20:35:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:35:17,313 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-23 20:35:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:17,314 INFO L225 Difference]: With dead ends: 119 [2020-10-23 20:35:17,314 INFO L226 Difference]: Without dead ends: 88 [2020-10-23 20:35:17,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:35:17,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-23 20:35:17,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2020-10-23 20:35:17,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-23 20:35:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-23 20:35:17,328 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 65 [2020-10-23 20:35:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:17,329 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-23 20:35:17,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:35:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-23 20:35:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-23 20:35:17,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:17,331 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:17,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:35:17,331 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:17,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:17,332 INFO L82 PathProgramCache]: Analyzing trace with hash -2067969098, now seen corresponding path program 3 times [2020-10-23 20:35:17,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:17,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688363322] [2020-10-23 20:35:17,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:17,928 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:17,930 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:18,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:18,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-23 20:35:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:18,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688363322] [2020-10-23 20:35:18,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:18,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:35:18,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531930763] [2020-10-23 20:35:18,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:35:18,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:18,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:35:18,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:35:18,185 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 10 states. [2020-10-23 20:35:18,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:18,496 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2020-10-23 20:35:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 20:35:18,498 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-23 20:35:18,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:18,499 INFO L225 Difference]: With dead ends: 129 [2020-10-23 20:35:18,499 INFO L226 Difference]: Without dead ends: 98 [2020-10-23 20:35:18,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:35:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-23 20:35:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2020-10-23 20:35:18,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-23 20:35:18,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-10-23 20:35:18,512 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 75 [2020-10-23 20:35:18,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:18,513 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-10-23 20:35:18,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:35:18,513 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-10-23 20:35:18,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-23 20:35:18,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:18,515 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:18,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:35:18,515 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:18,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:18,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1951741904, now seen corresponding path program 4 times [2020-10-23 20:35:18,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:18,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494484743] [2020-10-23 20:35:18,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:19,090 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:19,092 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:19,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:19,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-23 20:35:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:19,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494484743] [2020-10-23 20:35:19,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:19,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 20:35:19,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970230237] [2020-10-23 20:35:19,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 20:35:19,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:19,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 20:35:19,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:35:19,319 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 12 states. [2020-10-23 20:35:19,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:19,659 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2020-10-23 20:35:19,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 20:35:19,659 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2020-10-23 20:35:19,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:19,661 INFO L225 Difference]: With dead ends: 139 [2020-10-23 20:35:19,661 INFO L226 Difference]: Without dead ends: 108 [2020-10-23 20:35:19,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:35:19,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-23 20:35:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2020-10-23 20:35:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-23 20:35:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-10-23 20:35:19,690 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 85 [2020-10-23 20:35:19,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:19,693 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-10-23 20:35:19,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 20:35:19,693 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-10-23 20:35:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-23 20:35:19,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:19,702 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:19,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 20:35:19,702 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:19,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:19,703 INFO L82 PathProgramCache]: Analyzing trace with hash 120605546, now seen corresponding path program 5 times [2020-10-23 20:35:19,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:19,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931812902] [2020-10-23 20:35:19,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:20,270 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:20,273 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:20,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:20,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-23 20:35:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:20,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931812902] [2020-10-23 20:35:20,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:20,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 20:35:20,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682250194] [2020-10-23 20:35:20,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 20:35:20,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:20,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 20:35:20,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-23 20:35:20,464 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 14 states. [2020-10-23 20:35:20,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:20,809 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2020-10-23 20:35:20,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 20:35:20,809 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 95 [2020-10-23 20:35:20,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:20,812 INFO L225 Difference]: With dead ends: 149 [2020-10-23 20:35:20,812 INFO L226 Difference]: Without dead ends: 118 [2020-10-23 20:35:20,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-23 20:35:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-23 20:35:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 110. [2020-10-23 20:35:20,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-23 20:35:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2020-10-23 20:35:20,845 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 95 [2020-10-23 20:35:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:20,845 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2020-10-23 20:35:20,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 20:35:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2020-10-23 20:35:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-23 20:35:20,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:20,850 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:20,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 20:35:20,851 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:20,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:20,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1893521788, now seen corresponding path program 6 times [2020-10-23 20:35:20,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:20,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978287452] [2020-10-23 20:35:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:21,403 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:21,404 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:21,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:21,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-10-23 20:35:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:21,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978287452] [2020-10-23 20:35:21,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:21,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 20:35:21,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291565889] [2020-10-23 20:35:21,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 20:35:21,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:21,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 20:35:21,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:35:21,664 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 16 states. [2020-10-23 20:35:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:22,131 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2020-10-23 20:35:22,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 20:35:22,132 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 105 [2020-10-23 20:35:22,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:22,133 INFO L225 Difference]: With dead ends: 159 [2020-10-23 20:35:22,133 INFO L226 Difference]: Without dead ends: 128 [2020-10-23 20:35:22,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-10-23 20:35:22,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-23 20:35:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-10-23 20:35:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-23 20:35:22,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2020-10-23 20:35:22,148 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 105 [2020-10-23 20:35:22,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:22,148 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2020-10-23 20:35:22,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 20:35:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2020-10-23 20:35:22,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-23 20:35:22,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:22,150 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:22,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 20:35:22,150 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:22,151 INFO L82 PathProgramCache]: Analyzing trace with hash 347760926, now seen corresponding path program 7 times [2020-10-23 20:35:22,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:22,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287836721] [2020-10-23 20:35:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:22,691 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:22,693 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:22,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:22,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-10-23 20:35:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:22,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287836721] [2020-10-23 20:35:22,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:22,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-23 20:35:22,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360697035] [2020-10-23 20:35:22,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 20:35:22,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:22,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 20:35:22,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-23 20:35:22,996 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 18 states. [2020-10-23 20:35:23,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:23,528 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2020-10-23 20:35:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 20:35:23,528 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 115 [2020-10-23 20:35:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:23,530 INFO L225 Difference]: With dead ends: 169 [2020-10-23 20:35:23,530 INFO L226 Difference]: Without dead ends: 138 [2020-10-23 20:35:23,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-10-23 20:35:23,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-23 20:35:23,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2020-10-23 20:35:23,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-23 20:35:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2020-10-23 20:35:23,543 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 115 [2020-10-23 20:35:23,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:23,544 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2020-10-23 20:35:23,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 20:35:23,544 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2020-10-23 20:35:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-23 20:35:23,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:23,545 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:23,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 20:35:23,546 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:23,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1362801464, now seen corresponding path program 8 times [2020-10-23 20:35:23,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:23,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556716791] [2020-10-23 20:35:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:24,117 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:24,119 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:24,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:24,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-10-23 20:35:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:24,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556716791] [2020-10-23 20:35:24,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:24,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-23 20:35:24,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920930004] [2020-10-23 20:35:24,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 20:35:24,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:24,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 20:35:24,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:35:24,470 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 20 states. [2020-10-23 20:35:25,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:25,147 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2020-10-23 20:35:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-23 20:35:25,148 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 125 [2020-10-23 20:35:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:25,149 INFO L225 Difference]: With dead ends: 179 [2020-10-23 20:35:25,149 INFO L226 Difference]: Without dead ends: 148 [2020-10-23 20:35:25,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 20:35:25,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-23 20:35:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2020-10-23 20:35:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-23 20:35:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2020-10-23 20:35:25,166 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 125 [2020-10-23 20:35:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:25,167 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2020-10-23 20:35:25,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 20:35:25,168 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2020-10-23 20:35:25,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-23 20:35:25,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:25,170 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:25,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 20:35:25,170 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:25,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:25,171 INFO L82 PathProgramCache]: Analyzing trace with hash 681616594, now seen corresponding path program 9 times [2020-10-23 20:35:25,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:25,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077122384] [2020-10-23 20:35:25,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:25,700 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:25,702 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:26,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:26,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-10-23 20:35:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:26,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077122384] [2020-10-23 20:35:26,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:26,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-10-23 20:35:26,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075375441] [2020-10-23 20:35:26,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 20:35:26,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:26,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 20:35:26,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-23 20:35:26,119 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand 22 states. [2020-10-23 20:35:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:26,817 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2020-10-23 20:35:26,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-23 20:35:26,818 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 135 [2020-10-23 20:35:26,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:26,819 INFO L225 Difference]: With dead ends: 189 [2020-10-23 20:35:26,819 INFO L226 Difference]: Without dead ends: 158 [2020-10-23 20:35:26,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 20:35:26,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-23 20:35:26,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2020-10-23 20:35:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-23 20:35:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2020-10-23 20:35:26,843 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 135 [2020-10-23 20:35:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:26,843 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2020-10-23 20:35:26,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 20:35:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2020-10-23 20:35:26,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-23 20:35:26,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:26,845 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:26,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 20:35:26,846 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:26,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1549738516, now seen corresponding path program 10 times [2020-10-23 20:35:26,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:26,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263570774] [2020-10-23 20:35:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:27,392 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:27,394 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:27,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:27,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-10-23 20:35:27,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:27,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263570774] [2020-10-23 20:35:27,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:27,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-10-23 20:35:27,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724038288] [2020-10-23 20:35:27,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 20:35:27,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:27,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 20:35:27,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-10-23 20:35:27,853 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 24 states. [2020-10-23 20:35:28,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:28,626 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2020-10-23 20:35:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-23 20:35:28,627 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 145 [2020-10-23 20:35:28,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:28,628 INFO L225 Difference]: With dead ends: 199 [2020-10-23 20:35:28,628 INFO L226 Difference]: Without dead ends: 168 [2020-10-23 20:35:28,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 20:35:28,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-23 20:35:28,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 160. [2020-10-23 20:35:28,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-23 20:35:28,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2020-10-23 20:35:28,640 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 145 [2020-10-23 20:35:28,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:28,641 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2020-10-23 20:35:28,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 20:35:28,641 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2020-10-23 20:35:28,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-23 20:35:28,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:28,643 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:28,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 20:35:28,643 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:28,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1772617350, now seen corresponding path program 11 times [2020-10-23 20:35:28,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:28,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935435884] [2020-10-23 20:35:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:29,248 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:29,250 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:29,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:29,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-10-23 20:35:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:29,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935435884] [2020-10-23 20:35:29,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:29,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-10-23 20:35:29,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157687989] [2020-10-23 20:35:29,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-23 20:35:29,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:29,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-23 20:35:29,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-10-23 20:35:29,780 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 26 states. [2020-10-23 20:35:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:30,643 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2020-10-23 20:35:30,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-23 20:35:30,644 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 155 [2020-10-23 20:35:30,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:30,646 INFO L225 Difference]: With dead ends: 209 [2020-10-23 20:35:30,646 INFO L226 Difference]: Without dead ends: 178 [2020-10-23 20:35:30,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 20:35:30,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-23 20:35:30,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 170. [2020-10-23 20:35:30,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-23 20:35:30,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2020-10-23 20:35:30,661 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 155 [2020-10-23 20:35:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:30,661 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2020-10-23 20:35:30,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-23 20:35:30,662 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2020-10-23 20:35:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-23 20:35:30,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:30,664 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:30,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 20:35:30,664 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:30,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:30,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1160075616, now seen corresponding path program 12 times [2020-10-23 20:35:30,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:30,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118721671] [2020-10-23 20:35:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:31,239 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:31,241 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:31,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:31,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-10-23 20:35:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:31,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118721671] [2020-10-23 20:35:31,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:31,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-10-23 20:35:31,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541136146] [2020-10-23 20:35:31,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-23 20:35:31,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:31,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-23 20:35:31,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-10-23 20:35:31,777 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand 28 states. [2020-10-23 20:35:32,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:32,790 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2020-10-23 20:35:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-23 20:35:32,791 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 165 [2020-10-23 20:35:32,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:32,793 INFO L225 Difference]: With dead ends: 219 [2020-10-23 20:35:32,794 INFO L226 Difference]: Without dead ends: 188 [2020-10-23 20:35:32,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 20:35:32,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-23 20:35:32,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 180. [2020-10-23 20:35:32,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-23 20:35:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2020-10-23 20:35:32,806 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 165 [2020-10-23 20:35:32,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:32,807 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2020-10-23 20:35:32,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-23 20:35:32,807 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2020-10-23 20:35:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-23 20:35:32,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:32,809 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:32,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 20:35:32,809 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:32,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:32,810 INFO L82 PathProgramCache]: Analyzing trace with hash -367692230, now seen corresponding path program 13 times [2020-10-23 20:35:32,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:32,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571411693] [2020-10-23 20:35:32,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:33,380 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:33,382 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:33,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:33,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-10-23 20:35:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:34,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571411693] [2020-10-23 20:35:34,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:34,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-10-23 20:35:34,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482760320] [2020-10-23 20:35:34,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-23 20:35:34,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:34,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-23 20:35:34,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-10-23 20:35:34,011 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 30 states. [2020-10-23 20:35:35,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:35,136 INFO L93 Difference]: Finished difference Result 229 states and 231 transitions. [2020-10-23 20:35:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-23 20:35:35,137 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 175 [2020-10-23 20:35:35,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:35,139 INFO L225 Difference]: With dead ends: 229 [2020-10-23 20:35:35,139 INFO L226 Difference]: Without dead ends: 198 [2020-10-23 20:35:35,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 20:35:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-23 20:35:35,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 190. [2020-10-23 20:35:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-23 20:35:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2020-10-23 20:35:35,151 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 175 [2020-10-23 20:35:35,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:35,151 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2020-10-23 20:35:35,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-23 20:35:35,151 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2020-10-23 20:35:35,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-23 20:35:35,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:35,154 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:35,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 20:35:35,154 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:35,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1458376020, now seen corresponding path program 14 times [2020-10-23 20:35:35,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:35,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485679484] [2020-10-23 20:35:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:35,676 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:35,678 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:36,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:36,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-10-23 20:35:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:36,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485679484] [2020-10-23 20:35:36,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:36,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-10-23 20:35:36,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450689230] [2020-10-23 20:35:36,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-23 20:35:36,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:36,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-23 20:35:36,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-10-23 20:35:36,347 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 32 states. [2020-10-23 20:35:37,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:37,427 INFO L93 Difference]: Finished difference Result 239 states and 241 transitions. [2020-10-23 20:35:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-23 20:35:37,428 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 185 [2020-10-23 20:35:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:37,430 INFO L225 Difference]: With dead ends: 239 [2020-10-23 20:35:37,431 INFO L226 Difference]: Without dead ends: 208 [2020-10-23 20:35:37,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 20:35:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-23 20:35:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 200. [2020-10-23 20:35:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-23 20:35:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2020-10-23 20:35:37,442 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 185 [2020-10-23 20:35:37,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:37,443 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2020-10-23 20:35:37,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-23 20:35:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2020-10-23 20:35:37,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-23 20:35:37,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:37,446 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:37,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 20:35:37,446 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:37,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:37,447 INFO L82 PathProgramCache]: Analyzing trace with hash -408024082, now seen corresponding path program 15 times [2020-10-23 20:35:37,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:37,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139153190] [2020-10-23 20:35:37,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:37,980 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:37,982 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:38,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:38,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-10-23 20:35:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:38,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139153190] [2020-10-23 20:35:38,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:38,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-10-23 20:35:38,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310796750] [2020-10-23 20:35:38,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-23 20:35:38,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:38,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-23 20:35:38,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 20:35:38,785 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand 34 states. [2020-10-23 20:35:40,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:40,152 INFO L93 Difference]: Finished difference Result 249 states and 251 transitions. [2020-10-23 20:35:40,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-23 20:35:40,153 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 195 [2020-10-23 20:35:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:40,155 INFO L225 Difference]: With dead ends: 249 [2020-10-23 20:35:40,155 INFO L226 Difference]: Without dead ends: 218 [2020-10-23 20:35:40,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-10-23 20:35:40,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-23 20:35:40,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2020-10-23 20:35:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-23 20:35:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2020-10-23 20:35:40,169 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 195 [2020-10-23 20:35:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:40,170 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2020-10-23 20:35:40,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-23 20:35:40,170 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2020-10-23 20:35:40,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-23 20:35:40,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:40,171 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:40,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 20:35:40,172 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:40,172 INFO L82 PathProgramCache]: Analyzing trace with hash 56431112, now seen corresponding path program 16 times [2020-10-23 20:35:40,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:40,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457675635] [2020-10-23 20:35:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:40,702 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:40,703 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:41,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:41,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-10-23 20:35:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:41,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457675635] [2020-10-23 20:35:41,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:41,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-10-23 20:35:41,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847715772] [2020-10-23 20:35:41,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-23 20:35:41,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:41,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-23 20:35:41,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 20:35:41,573 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand 36 states. [2020-10-23 20:35:43,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:43,143 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2020-10-23 20:35:43,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-23 20:35:43,144 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 205 [2020-10-23 20:35:43,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:43,146 INFO L225 Difference]: With dead ends: 259 [2020-10-23 20:35:43,146 INFO L226 Difference]: Without dead ends: 228 [2020-10-23 20:35:43,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-10-23 20:35:43,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-23 20:35:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 220. [2020-10-23 20:35:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-23 20:35:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2020-10-23 20:35:43,158 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 205 [2020-10-23 20:35:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:43,159 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2020-10-23 20:35:43,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-23 20:35:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2020-10-23 20:35:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-23 20:35:43,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:43,162 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:43,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 20:35:43,162 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:43,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:43,162 INFO L82 PathProgramCache]: Analyzing trace with hash 196525986, now seen corresponding path program 17 times [2020-10-23 20:35:43,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:43,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640176863] [2020-10-23 20:35:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:43,671 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:43,673 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:44,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:44,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-10-23 20:35:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:44,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640176863] [2020-10-23 20:35:44,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:44,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-10-23 20:35:44,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854741119] [2020-10-23 20:35:44,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-23 20:35:44,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:44,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-23 20:35:44,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 20:35:44,612 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand 38 states. [2020-10-23 20:35:46,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:46,259 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2020-10-23 20:35:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-23 20:35:46,260 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 215 [2020-10-23 20:35:46,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:46,262 INFO L225 Difference]: With dead ends: 269 [2020-10-23 20:35:46,262 INFO L226 Difference]: Without dead ends: 238 [2020-10-23 20:35:46,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-10-23 20:35:46,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-23 20:35:46,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2020-10-23 20:35:46,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-23 20:35:46,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 231 transitions. [2020-10-23 20:35:46,273 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 231 transitions. Word has length 215 [2020-10-23 20:35:46,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:46,273 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 231 transitions. [2020-10-23 20:35:46,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-23 20:35:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 231 transitions. [2020-10-23 20:35:46,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-23 20:35:46,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:46,275 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:46,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 20:35:46,275 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:46,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:46,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1462744252, now seen corresponding path program 18 times [2020-10-23 20:35:46,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:46,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318047601] [2020-10-23 20:35:46,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:46,829 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:46,831 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:47,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:47,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-10-23 20:35:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:47,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318047601] [2020-10-23 20:35:47,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:47,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-10-23 20:35:47,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157305769] [2020-10-23 20:35:47,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-23 20:35:47,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:47,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-23 20:35:47,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 20:35:47,830 INFO L87 Difference]: Start difference. First operand 230 states and 231 transitions. Second operand 40 states. [2020-10-23 20:35:49,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:49,573 INFO L93 Difference]: Finished difference Result 279 states and 281 transitions. [2020-10-23 20:35:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-23 20:35:49,574 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 225 [2020-10-23 20:35:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:49,576 INFO L225 Difference]: With dead ends: 279 [2020-10-23 20:35:49,577 INFO L226 Difference]: Without dead ends: 248 [2020-10-23 20:35:49,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-10-23 20:35:49,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-23 20:35:49,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2020-10-23 20:35:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-23 20:35:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2020-10-23 20:35:49,590 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 225 [2020-10-23 20:35:49,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:49,592 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2020-10-23 20:35:49,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-23 20:35:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2020-10-23 20:35:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-23 20:35:49,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:49,594 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:49,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 20:35:49,594 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:49,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1426812586, now seen corresponding path program 19 times [2020-10-23 20:35:49,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:49,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644682587] [2020-10-23 20:35:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:50,118 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:50,119 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:51,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:51,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-10-23 20:35:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:51,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644682587] [2020-10-23 20:35:51,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:51,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-10-23 20:35:51,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705737611] [2020-10-23 20:35:51,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-23 20:35:51,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:51,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-23 20:35:51,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-10-23 20:35:51,233 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand 42 states. [2020-10-23 20:35:53,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:53,123 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2020-10-23 20:35:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-23 20:35:53,124 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 235 [2020-10-23 20:35:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:53,127 INFO L225 Difference]: With dead ends: 281 [2020-10-23 20:35:53,127 INFO L226 Difference]: Without dead ends: 250 [2020-10-23 20:35:53,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-10-23 20:35:53,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-23 20:35:53,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-10-23 20:35:53,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-23 20:35:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2020-10-23 20:35:53,140 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 235 [2020-10-23 20:35:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:53,140 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2020-10-23 20:35:53,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-23 20:35:53,141 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2020-10-23 20:35:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-23 20:35:53,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:53,142 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:53,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 20:35:53,142 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:53,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:53,143 INFO L82 PathProgramCache]: Analyzing trace with hash 887747952, now seen corresponding path program 20 times [2020-10-23 20:35:53,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:53,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519657453] [2020-10-23 20:35:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:53,700 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:35:53,702 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:35:53,818 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:35:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:35:53,931 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:35:54,031 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:35:54,031 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:35:54,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-23 20:35:54,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:35:54 BoogieIcfgContainer [2020-10-23 20:35:54,078 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:35:54,083 INFO L168 Benchmark]: Toolchain (without parser) took 40472.46 ms. Allocated memory was 161.5 MB in the beginning and 337.6 MB in the end (delta: 176.2 MB). Free memory was 145.7 MB in the beginning and 308.1 MB in the end (delta: -162.4 MB). Peak memory consumption was 207.2 MB. Max. memory is 8.0 GB. [2020-10-23 20:35:54,088 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 161.5 MB. Free memory is still 134.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:35:54,089 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.37 ms. Allocated memory is still 161.5 MB. Free memory was 144.9 MB in the beginning and 135.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:35:54,089 INFO L168 Benchmark]: Boogie Preprocessor took 94.33 ms. Allocated memory is still 161.5 MB. Free memory was 135.2 MB in the beginning and 143.9 MB in the end (delta: -8.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:35:54,090 INFO L168 Benchmark]: RCFGBuilder took 529.67 ms. Allocated memory is still 161.5 MB. Free memory was 143.9 MB in the beginning and 125.6 MB in the end (delta: 18.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-10-23 20:35:54,090 INFO L168 Benchmark]: TraceAbstraction took 39547.89 ms. Allocated memory was 161.5 MB in the beginning and 337.6 MB in the end (delta: 176.2 MB). Free memory was 125.0 MB in the beginning and 308.1 MB in the end (delta: -183.1 MB). Peak memory consumption was 187.3 MB. Max. memory is 8.0 GB. [2020-10-23 20:35:54,097 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 161.5 MB. Free memory is still 134.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 289.37 ms. Allocated memory is still 161.5 MB. Free memory was 144.9 MB in the beginning and 135.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 94.33 ms. Allocated memory is still 161.5 MB. Free memory was 135.2 MB in the beginning and 143.9 MB in the end (delta: -8.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 529.67 ms. Allocated memory is still 161.5 MB. Free memory was 143.9 MB in the beginning and 125.6 MB in the end (delta: 18.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 39547.89 ms. Allocated memory was 161.5 MB in the beginning and 337.6 MB in the end (delta: 176.2 MB). Free memory was 125.0 MB in the beginning and 308.1 MB in the end (delta: -183.1 MB). Peak memory consumption was 187.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] struct dummy ad1[20], *ad2; [L18] int i, j, *pa; [L19] j=0 [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND FALSE !(j<20) [L23] i = __VERIFIER_nondet_int() [L24] COND TRUE i >= 0 && i < 10 [L25] ad2 = ad1 [L26] ad1[i].a = i [L27] pa = &ad1[i].a [L28] EXPR ad2[i].a [L28] i = ad2[i].a + 10 [L29] EXPR \read(*pa) [L29] COND FALSE !(i < *pa) [L32] CALL, EXPR check(ad1, i) [L12] EXPR ad1[b].a [L12] return ad1[b].a == b; [L32] RET, EXPR check(ad1, i) [L32] COND TRUE !check(ad1, i) [L39] CALL reach_error() [L3] __assert_fail("0", "test24-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 73 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 39.4s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 17.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1149 SDtfs, 1877 SDslu, 14067 SDs, 0 SdLazy, 5871 SolverSat, 325 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 906 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 801 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7391 ImplicationChecksByTransitivity, 17.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=250occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 21 MinimizatonAttempts, 152 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...