/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/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:44:39,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:44:39,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:44:39,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 21:44:39,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 21:44:39,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 21:44:39,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 21:44:39,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 21:44:39,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 21:44:39,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 21:44:39,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 21:44:39,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 21:44:39,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:44:39,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:44:39,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:44:39,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:44:39,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:44:39,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:44:39,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:44:39,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:44:39,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:44:39,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:44:39,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:44:39,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:44:39,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:44:39,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 21:44:39,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 21:44:39,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 21:44:39,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 21:44:39,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 21:44:39,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 21:44:39,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 21:44:39,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 21:44:39,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:44:39,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:44:39,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:44:39,591 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 21:44:39,617 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:44:39,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:44:39,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:44:39,623 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:44:39,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:44:39,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:44:39,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:44:39,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:44:39,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:44:39,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:44:39,625 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:44:39,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:44:39,625 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:44:39,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:44:39,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:44:39,626 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:44:39,627 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:44:39,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:44:39,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:44:39,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:44:39,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:44:39,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:44:39,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:44:40,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:44:40,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:44:40,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:44:40,072 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:44:40,073 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:44:40,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-10-23 21:44:40,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe3b044d2/6efec3e667ae4ad594503f2987929cba/FLAG537ae79db [2020-10-23 21:44:40,850 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:44:40,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-10-23 21:44:40,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe3b044d2/6efec3e667ae4ad594503f2987929cba/FLAG537ae79db [2020-10-23 21:44:41,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe3b044d2/6efec3e667ae4ad594503f2987929cba [2020-10-23 21:44:41,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:44:41,177 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:44:41,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:44:41,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:44:41,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:44:41,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:44:41" (1/1) ... [2020-10-23 21:44:41,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d84a9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:41, skipping insertion in model container [2020-10-23 21:44:41,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:44:41" (1/1) ... [2020-10-23 21:44:41,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:44:41,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:44:41,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:44:41,401 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:44:41,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:44:41,442 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:44:41,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:41 WrapperNode [2020-10-23 21:44:41,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:44:41,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:44:41,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:44:41,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:44:41,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:41" (1/1) ... [2020-10-23 21:44:41,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:41" (1/1) ... [2020-10-23 21:44:41,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:41" (1/1) ... [2020-10-23 21:44:41,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:41" (1/1) ... [2020-10-23 21:44:41,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:41" (1/1) ... [2020-10-23 21:44:41,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:41" (1/1) ... [2020-10-23 21:44:41,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:41" (1/1) ... [2020-10-23 21:44:41,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:44:41,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:44:41,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:44:41,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:44:41,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:41" (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 21:44:41,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:44:41,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:44:41,577 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:44:41,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:44:41,577 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-10-23 21:44:41,578 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:44:41,578 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:44:41,578 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:44:41,578 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 21:44:41,578 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 21:44:41,579 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:44:41,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:44:41,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:44:41,579 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 21:44:41,579 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-10-23 21:44:41,580 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 21:44:41,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 21:44:41,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 21:44:41,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:44:41,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 21:44:41,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:44:41,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:44:41,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:44:41,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:44:41,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:44:41,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:44:42,037 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:44:42,038 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 21:44:42,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:44:42 BoogieIcfgContainer [2020-10-23 21:44:42,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:44:42,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:44:42,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:44:42,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:44:42,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:44:41" (1/3) ... [2020-10-23 21:44:42,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7656b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:44:42, skipping insertion in model container [2020-10-23 21:44:42,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:41" (2/3) ... [2020-10-23 21:44:42,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7656b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:44:42, skipping insertion in model container [2020-10-23 21:44:42,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:44:42" (3/3) ... [2020-10-23 21:44:42,052 INFO L111 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-10-23 21:44:42,067 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:44:42,073 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:44:42,091 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:44:42,118 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:44:42,118 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:44:42,118 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:44:42,118 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:44:42,119 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:44:42,119 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:44:42,119 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:44:42,119 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:44:42,136 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-10-23 21:44:42,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-23 21:44:42,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:42,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:44:42,150 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:42,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:42,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1175551776, now seen corresponding path program 1 times [2020-10-23 21:44:42,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:42,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361522820] [2020-10-23 21:44:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:42,258 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:42,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:42,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:42,577 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 21:44:42,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361522820] [2020-10-23 21:44:42,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:42,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 21:44:42,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043058441] [2020-10-23 21:44:42,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 21:44:42,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:42,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 21:44:42,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 21:44:42,607 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2020-10-23 21:44:43,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:43,168 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2020-10-23 21:44:43,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 21:44:43,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-23 21:44:43,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:43,182 INFO L225 Difference]: With dead ends: 121 [2020-10-23 21:44:43,182 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 21:44:43,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:44:43,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 21:44:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-10-23 21:44:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 21:44:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-23 21:44:43,253 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-10-23 21:44:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:43,254 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-23 21:44:43,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 21:44:43,254 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-23 21:44:43,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 21:44:43,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:43,256 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] [2020-10-23 21:44:43,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:44:43,257 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:43,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:43,258 INFO L82 PathProgramCache]: Analyzing trace with hash -69019303, now seen corresponding path program 1 times [2020-10-23 21:44:43,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:43,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979506110] [2020-10-23 21:44:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:43,363 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:43,366 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:43,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:43,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:43,622 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 21:44:43,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979506110] [2020-10-23 21:44:43,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:43,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 21:44:43,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888651645] [2020-10-23 21:44:43,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 21:44:43,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:43,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 21:44:43,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 21:44:43,632 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 7 states. [2020-10-23 21:44:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:44,224 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2020-10-23 21:44:44,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 21:44:44,225 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-23 21:44:44,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:44,228 INFO L225 Difference]: With dead ends: 100 [2020-10-23 21:44:44,228 INFO L226 Difference]: Without dead ends: 83 [2020-10-23 21:44:44,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:44:44,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-23 21:44:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2020-10-23 21:44:44,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 21:44:44,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-23 21:44:44,245 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 42 [2020-10-23 21:44:44,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:44,246 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-23 21:44:44,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 21:44:44,246 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-23 21:44:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-23 21:44:44,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:44,249 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:44:44,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:44:44,249 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:44,250 INFO L82 PathProgramCache]: Analyzing trace with hash -532040000, now seen corresponding path program 2 times [2020-10-23 21:44:44,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:44,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084053845] [2020-10-23 21:44:44,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:44,647 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:44,650 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:44,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:44,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:44,987 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 21:44:44,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084053845] [2020-10-23 21:44:44,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:44,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 21:44:44,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675530636] [2020-10-23 21:44:44,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 21:44:44,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:44,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 21:44:44,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 21:44:44,997 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 7 states. [2020-10-23 21:44:45,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:45,719 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2020-10-23 21:44:45,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 21:44:45,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-10-23 21:44:45,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:45,725 INFO L225 Difference]: With dead ends: 109 [2020-10-23 21:44:45,725 INFO L226 Difference]: Without dead ends: 70 [2020-10-23 21:44:45,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-23 21:44:45,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-23 21:44:45,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-10-23 21:44:45,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-23 21:44:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-23 21:44:45,741 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 49 [2020-10-23 21:44:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:45,742 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-23 21:44:45,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 21:44:45,742 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-23 21:44:45,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-23 21:44:45,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:45,745 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:44:45,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:44:45,745 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:45,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:45,746 INFO L82 PathProgramCache]: Analyzing trace with hash -661502084, now seen corresponding path program 1 times [2020-10-23 21:44:45,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:45,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280858497] [2020-10-23 21:44:45,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:46,326 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:46,330 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:46,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:46,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:46,750 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 21:44:46,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280858497] [2020-10-23 21:44:46,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:46,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 21:44:46,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102436180] [2020-10-23 21:44:46,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 21:44:46,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:46,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 21:44:46,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-23 21:44:46,753 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 9 states. [2020-10-23 21:44:47,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:47,571 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2020-10-23 21:44:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 21:44:47,572 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-23 21:44:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:47,575 INFO L225 Difference]: With dead ends: 115 [2020-10-23 21:44:47,575 INFO L226 Difference]: Without dead ends: 76 [2020-10-23 21:44:47,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-23 21:44:47,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-23 21:44:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-10-23 21:44:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-23 21:44:47,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-10-23 21:44:47,590 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-10-23 21:44:47,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:47,591 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-10-23 21:44:47,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 21:44:47,591 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-10-23 21:44:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-23 21:44:47,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:47,593 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2020-10-23 21:44:47,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 21:44:47,593 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:47,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:47,594 INFO L82 PathProgramCache]: Analyzing trace with hash -717071560, now seen corresponding path program 2 times [2020-10-23 21:44:47,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:47,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795904611] [2020-10-23 21:44:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:48,827 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:48,829 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:48,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:48,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:49,441 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 21:44:49,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795904611] [2020-10-23 21:44:49,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:49,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 21:44:49,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359065903] [2020-10-23 21:44:49,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 21:44:49,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:49,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 21:44:49,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-23 21:44:49,445 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 11 states. [2020-10-23 21:44:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:50,282 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2020-10-23 21:44:50,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 21:44:50,284 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-10-23 21:44:50,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:50,286 INFO L225 Difference]: With dead ends: 121 [2020-10-23 21:44:50,286 INFO L226 Difference]: Without dead ends: 82 [2020-10-23 21:44:50,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-10-23 21:44:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-23 21:44:50,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-10-23 21:44:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-23 21:44:50,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-23 21:44:50,302 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-10-23 21:44:50,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:50,302 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-23 21:44:50,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 21:44:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-23 21:44:50,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 21:44:50,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:50,304 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-10-23 21:44:50,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 21:44:50,305 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:50,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:50,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2104209908, now seen corresponding path program 3 times [2020-10-23 21:44:50,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:50,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177034838] [2020-10-23 21:44:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:51,560 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:51,562 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:51,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:51,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:52,278 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 21:44:52,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177034838] [2020-10-23 21:44:52,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:52,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-23 21:44:52,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305023106] [2020-10-23 21:44:52,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 21:44:52,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:52,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 21:44:52,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-23 21:44:52,282 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 13 states. [2020-10-23 21:44:53,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:53,236 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2020-10-23 21:44:53,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 21:44:53,236 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-23 21:44:53,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:53,241 INFO L225 Difference]: With dead ends: 127 [2020-10-23 21:44:53,241 INFO L226 Difference]: Without dead ends: 88 [2020-10-23 21:44:53,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-10-23 21:44:53,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-23 21:44:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-10-23 21:44:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-23 21:44:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-10-23 21:44:53,261 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-10-23 21:44:53,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:53,261 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-10-23 21:44:53,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 21:44:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-10-23 21:44:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-23 21:44:53,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:53,263 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2020-10-23 21:44:53,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 21:44:53,264 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:53,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:53,265 INFO L82 PathProgramCache]: Analyzing trace with hash -741340240, now seen corresponding path program 4 times [2020-10-23 21:44:53,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:53,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547267929] [2020-10-23 21:44:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:54,446 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:54,448 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:54,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:54,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:55,426 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 21:44:55,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547267929] [2020-10-23 21:44:55,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:55,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-23 21:44:55,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264245179] [2020-10-23 21:44:55,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 21:44:55,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:55,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 21:44:55,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-23 21:44:55,430 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 15 states. [2020-10-23 21:44:56,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:56,573 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2020-10-23 21:44:56,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 21:44:56,575 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-10-23 21:44:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:56,579 INFO L225 Difference]: With dead ends: 133 [2020-10-23 21:44:56,579 INFO L226 Difference]: Without dead ends: 94 [2020-10-23 21:44:56,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-10-23 21:44:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-23 21:44:56,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-10-23 21:44:56,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-23 21:44:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-10-23 21:44:56,614 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-10-23 21:44:56,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:56,614 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-10-23 21:44:56,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 21:44:56,615 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-10-23 21:44:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-23 21:44:56,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:56,626 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2020-10-23 21:44:56,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 21:44:56,627 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:56,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:56,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1293866900, now seen corresponding path program 5 times [2020-10-23 21:44:56,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:56,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551400005] [2020-10-23 21:44:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:57,837 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:57,839 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:57,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:57,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:58,892 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 21:44:58,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551400005] [2020-10-23 21:44:58,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:58,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-23 21:44:58,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768006607] [2020-10-23 21:44:58,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 21:44:58,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:58,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 21:44:58,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-23 21:44:58,895 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 17 states. [2020-10-23 21:45:00,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:00,191 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2020-10-23 21:45:00,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-23 21:45:00,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-10-23 21:45:00,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:00,195 INFO L225 Difference]: With dead ends: 139 [2020-10-23 21:45:00,195 INFO L226 Difference]: Without dead ends: 100 [2020-10-23 21:45:00,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-10-23 21:45:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-23 21:45:00,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-10-23 21:45:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-23 21:45:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-10-23 21:45:00,227 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-10-23 21:45:00,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:00,230 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-10-23 21:45:00,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 21:45:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-10-23 21:45:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-23 21:45:00,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:00,240 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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] [2020-10-23 21:45:00,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 21:45:00,240 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:00,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1220593704, now seen corresponding path program 6 times [2020-10-23 21:45:00,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:00,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849819794] [2020-10-23 21:45:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:01,425 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:01,427 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:01,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:01,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:02,735 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 21:45:02,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849819794] [2020-10-23 21:45:02,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:02,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-10-23 21:45:02,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766485932] [2020-10-23 21:45:02,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 21:45:02,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:02,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 21:45:02,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-23 21:45:02,738 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 19 states. [2020-10-23 21:45:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:04,183 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2020-10-23 21:45:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-23 21:45:04,183 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-10-23 21:45:04,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:04,185 INFO L225 Difference]: With dead ends: 145 [2020-10-23 21:45:04,185 INFO L226 Difference]: Without dead ends: 106 [2020-10-23 21:45:04,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 21:45:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-23 21:45:04,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-10-23 21:45:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-23 21:45:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-10-23 21:45:04,201 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-10-23 21:45:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:04,202 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-10-23 21:45:04,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 21:45:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-10-23 21:45:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-23 21:45:04,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:04,206 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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] [2020-10-23 21:45:04,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 21:45:04,207 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:04,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:04,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1824478492, now seen corresponding path program 7 times [2020-10-23 21:45:04,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:04,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739070786] [2020-10-23 21:45:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:05,357 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:05,359 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:05,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:05,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:06,761 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 21:45:06,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739070786] [2020-10-23 21:45:06,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:06,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-10-23 21:45:06,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440455832] [2020-10-23 21:45:06,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 21:45:06,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:06,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 21:45:06,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-23 21:45:06,764 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 21 states. [2020-10-23 21:45:08,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:08,506 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2020-10-23 21:45:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-23 21:45:08,507 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2020-10-23 21:45:08,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:08,510 INFO L225 Difference]: With dead ends: 151 [2020-10-23 21:45:08,510 INFO L226 Difference]: Without dead ends: 112 [2020-10-23 21:45:08,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-10-23 21:45:08,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-23 21:45:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-10-23 21:45:08,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-23 21:45:08,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-10-23 21:45:08,525 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-10-23 21:45:08,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:08,525 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-10-23 21:45:08,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 21:45:08,525 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-10-23 21:45:08,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-23 21:45:08,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:08,527 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 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] [2020-10-23 21:45:08,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 21:45:08,527 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:08,528 INFO L82 PathProgramCache]: Analyzing trace with hash -605908832, now seen corresponding path program 8 times [2020-10-23 21:45:08,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:08,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590884545] [2020-10-23 21:45:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:09,746 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:09,748 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:09,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:09,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:11,411 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 21:45:11,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590884545] [2020-10-23 21:45:11,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:11,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-10-23 21:45:11,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185571789] [2020-10-23 21:45:11,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 21:45:11,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:11,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 21:45:11,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-10-23 21:45:11,414 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 23 states. [2020-10-23 21:45:13,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:13,364 INFO L93 Difference]: Finished difference Result 157 states and 167 transitions. [2020-10-23 21:45:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-23 21:45:13,365 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 97 [2020-10-23 21:45:13,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:13,367 INFO L225 Difference]: With dead ends: 157 [2020-10-23 21:45:13,367 INFO L226 Difference]: Without dead ends: 118 [2020-10-23 21:45:13,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2020-10-23 21:45:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-23 21:45:13,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-10-23 21:45:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-23 21:45:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-10-23 21:45:13,384 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-10-23 21:45:13,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:13,384 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-10-23 21:45:13,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 21:45:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-10-23 21:45:13,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-23 21:45:13,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:13,386 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 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] [2020-10-23 21:45:13,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 21:45:13,387 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:13,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:13,387 INFO L82 PathProgramCache]: Analyzing trace with hash 869808476, now seen corresponding path program 9 times [2020-10-23 21:45:13,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:13,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813088527] [2020-10-23 21:45:13,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:14,646 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:14,648 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:14,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:14,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:16,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813088527] [2020-10-23 21:45:16,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:16,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-10-23 21:45:16,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224091031] [2020-10-23 21:45:16,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-23 21:45:16,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:16,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-23 21:45:16,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-10-23 21:45:16,507 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 25 states. [2020-10-23 21:45:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:18,637 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2020-10-23 21:45:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-23 21:45:18,638 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 103 [2020-10-23 21:45:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:18,639 INFO L225 Difference]: With dead ends: 163 [2020-10-23 21:45:18,639 INFO L226 Difference]: Without dead ends: 124 [2020-10-23 21:45:18,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-10-23 21:45:18,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-23 21:45:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-10-23 21:45:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-23 21:45:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-10-23 21:45:18,657 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-10-23 21:45:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:18,657 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-10-23 21:45:18,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-23 21:45:18,657 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-10-23 21:45:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-23 21:45:18,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:18,659 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 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] [2020-10-23 21:45:18,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 21:45:18,659 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:18,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:18,660 INFO L82 PathProgramCache]: Analyzing trace with hash -268212968, now seen corresponding path program 10 times [2020-10-23 21:45:18,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:18,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762287627] [2020-10-23 21:45:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:19,881 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:19,882 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:19,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:19,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:22,016 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 21:45:22,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762287627] [2020-10-23 21:45:22,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:22,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-10-23 21:45:22,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580931203] [2020-10-23 21:45:22,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 21:45:22,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:22,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 21:45:22,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-10-23 21:45:22,019 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 27 states. [2020-10-23 21:45:24,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:24,563 INFO L93 Difference]: Finished difference Result 169 states and 179 transitions. [2020-10-23 21:45:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-23 21:45:24,564 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 109 [2020-10-23 21:45:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:24,566 INFO L225 Difference]: With dead ends: 169 [2020-10-23 21:45:24,566 INFO L226 Difference]: Without dead ends: 130 [2020-10-23 21:45:24,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=725, Invalid=1825, Unknown=0, NotChecked=0, Total=2550 [2020-10-23 21:45:24,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-23 21:45:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-10-23 21:45:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-23 21:45:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-10-23 21:45:24,583 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-10-23 21:45:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:24,583 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-10-23 21:45:24,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 21:45:24,583 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-10-23 21:45:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-23 21:45:24,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:24,585 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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] [2020-10-23 21:45:24,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 21:45:24,585 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:24,586 INFO L82 PathProgramCache]: Analyzing trace with hash 620090324, now seen corresponding path program 11 times [2020-10-23 21:45:24,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:24,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446816055] [2020-10-23 21:45:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:25,809 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:25,811 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:25,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:25,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:28,078 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 21:45:28,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446816055] [2020-10-23 21:45:28,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:28,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-10-23 21:45:28,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912181917] [2020-10-23 21:45:28,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-23 21:45:28,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:28,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-23 21:45:28,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-10-23 21:45:28,081 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 29 states. [2020-10-23 21:45:30,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:30,769 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2020-10-23 21:45:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-23 21:45:30,771 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-10-23 21:45:30,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:30,772 INFO L225 Difference]: With dead ends: 175 [2020-10-23 21:45:30,772 INFO L226 Difference]: Without dead ends: 136 [2020-10-23 21:45:30,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=849, Invalid=2121, Unknown=0, NotChecked=0, Total=2970 [2020-10-23 21:45:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-23 21:45:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-10-23 21:45:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-23 21:45:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-10-23 21:45:30,790 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-10-23 21:45:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:30,790 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-10-23 21:45:30,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-23 21:45:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-10-23 21:45:30,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-23 21:45:30,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:30,792 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 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] [2020-10-23 21:45:30,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 21:45:30,792 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:30,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:30,793 INFO L82 PathProgramCache]: Analyzing trace with hash 586237328, now seen corresponding path program 12 times [2020-10-23 21:45:30,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:30,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175266983] [2020-10-23 21:45:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:32,013 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:32,015 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:32,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:32,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:34,622 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 21:45:34,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175266983] [2020-10-23 21:45:34,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:34,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-10-23 21:45:34,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462943561] [2020-10-23 21:45:34,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-23 21:45:34,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-23 21:45:34,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-10-23 21:45:34,625 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 31 states. [2020-10-23 21:45:37,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:37,765 INFO L93 Difference]: Finished difference Result 181 states and 191 transitions. [2020-10-23 21:45:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-23 21:45:37,767 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2020-10-23 21:45:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:37,768 INFO L225 Difference]: With dead ends: 181 [2020-10-23 21:45:37,768 INFO L226 Difference]: Without dead ends: 142 [2020-10-23 21:45:37,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=983, Invalid=2439, Unknown=0, NotChecked=0, Total=3422 [2020-10-23 21:45:37,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-23 21:45:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-10-23 21:45:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-23 21:45:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-10-23 21:45:37,787 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-10-23 21:45:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:37,787 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-10-23 21:45:37,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-23 21:45:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-10-23 21:45:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-23 21:45:37,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:37,789 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 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] [2020-10-23 21:45:37,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 21:45:37,789 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:37,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:37,790 INFO L82 PathProgramCache]: Analyzing trace with hash -236488116, now seen corresponding path program 13 times [2020-10-23 21:45:37,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:37,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978418939] [2020-10-23 21:45:37,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:38,987 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:38,989 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:39,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:39,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:41,848 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 21:45:41,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978418939] [2020-10-23 21:45:41,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:41,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-10-23 21:45:41,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052218723] [2020-10-23 21:45:41,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-23 21:45:41,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:41,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-23 21:45:41,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 21:45:41,850 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 33 states. [2020-10-23 21:45:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:44,982 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2020-10-23 21:45:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-23 21:45:44,983 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 127 [2020-10-23 21:45:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:44,985 INFO L225 Difference]: With dead ends: 187 [2020-10-23 21:45:44,985 INFO L226 Difference]: Without dead ends: 148 [2020-10-23 21:45:44,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1127, Invalid=2779, Unknown=0, NotChecked=0, Total=3906 [2020-10-23 21:45:44,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-23 21:45:45,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-10-23 21:45:45,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-23 21:45:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-10-23 21:45:45,006 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-10-23 21:45:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:45,006 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-10-23 21:45:45,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-23 21:45:45,007 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-10-23 21:45:45,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-23 21:45:45,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:45,008 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 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] [2020-10-23 21:45:45,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 21:45:45,008 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:45,009 INFO L82 PathProgramCache]: Analyzing trace with hash -847629816, now seen corresponding path program 14 times [2020-10-23 21:45:45,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:45,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653530913] [2020-10-23 21:45:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:46,260 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:46,262 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:46,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:46,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:49,463 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 21:45:49,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653530913] [2020-10-23 21:45:49,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:49,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-10-23 21:45:49,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472296803] [2020-10-23 21:45:49,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-23 21:45:49,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:49,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-23 21:45:49,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 21:45:49,465 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 35 states. [2020-10-23 21:45:53,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:53,560 INFO L93 Difference]: Finished difference Result 193 states and 203 transitions. [2020-10-23 21:45:53,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-23 21:45:53,561 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2020-10-23 21:45:53,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:53,563 INFO L225 Difference]: With dead ends: 193 [2020-10-23 21:45:53,564 INFO L226 Difference]: Without dead ends: 154 [2020-10-23 21:45:53,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1281, Invalid=3141, Unknown=0, NotChecked=0, Total=4422 [2020-10-23 21:45:53,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-23 21:45:53,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-10-23 21:45:53,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-23 21:45:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-10-23 21:45:53,584 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-10-23 21:45:53,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:53,584 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-10-23 21:45:53,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-23 21:45:53,584 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-10-23 21:45:53,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-23 21:45:53,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:53,585 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 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] [2020-10-23 21:45:53,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 21:45:53,586 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:53,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:53,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1594151740, now seen corresponding path program 15 times [2020-10-23 21:45:53,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:53,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187668561] [2020-10-23 21:45:53,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:54,778 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:54,779 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:54,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:54,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:58,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187668561] [2020-10-23 21:45:58,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:58,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-10-23 21:45:58,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311698322] [2020-10-23 21:45:58,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-23 21:45:58,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:58,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-23 21:45:58,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 21:45:58,165 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 37 states. [2020-10-23 21:46:02,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:02,409 INFO L93 Difference]: Finished difference Result 199 states and 209 transitions. [2020-10-23 21:46:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-23 21:46:02,410 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 139 [2020-10-23 21:46:02,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:02,412 INFO L225 Difference]: With dead ends: 199 [2020-10-23 21:46:02,412 INFO L226 Difference]: Without dead ends: 160 [2020-10-23 21:46:02,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1445, Invalid=3525, Unknown=0, NotChecked=0, Total=4970 [2020-10-23 21:46:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-23 21:46:02,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-10-23 21:46:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-23 21:46:02,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-10-23 21:46:02,436 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-10-23 21:46:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:02,436 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-10-23 21:46:02,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-23 21:46:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-10-23 21:46:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-23 21:46:02,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:02,438 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 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] [2020-10-23 21:46:02,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 21:46:02,438 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:02,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:02,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2090063232, now seen corresponding path program 16 times [2020-10-23 21:46:02,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:02,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5838551] [2020-10-23 21:46:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:03,704 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:03,706 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:03,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:03,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:46:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:07,595 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 21:46:07,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5838551] [2020-10-23 21:46:07,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:07,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-10-23 21:46:07,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506492818] [2020-10-23 21:46:07,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-23 21:46:07,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:07,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-23 21:46:07,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2020-10-23 21:46:07,598 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 39 states. [2020-10-23 21:46:11,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:11,836 INFO L93 Difference]: Finished difference Result 205 states and 215 transitions. [2020-10-23 21:46:11,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-23 21:46:11,837 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 145 [2020-10-23 21:46:11,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:11,839 INFO L225 Difference]: With dead ends: 205 [2020-10-23 21:46:11,839 INFO L226 Difference]: Without dead ends: 166 [2020-10-23 21:46:11,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1619, Invalid=3931, Unknown=0, NotChecked=0, Total=5550 [2020-10-23 21:46:11,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-23 21:46:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-10-23 21:46:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-23 21:46:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-10-23 21:46:11,856 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-10-23 21:46:11,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:11,857 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-10-23 21:46:11,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-23 21:46:11,857 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-10-23 21:46:11,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-23 21:46:11,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:11,858 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 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] [2020-10-23 21:46:11,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 21:46:11,858 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:11,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:11,859 INFO L82 PathProgramCache]: Analyzing trace with hash 863955772, now seen corresponding path program 17 times [2020-10-23 21:46:11,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:11,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702059653] [2020-10-23 21:46:11,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:13,099 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:13,101 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:13,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:13,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:46:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:17,200 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 21:46:17,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702059653] [2020-10-23 21:46:17,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:17,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-10-23 21:46:17,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825722342] [2020-10-23 21:46:17,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-23 21:46:17,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:17,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-23 21:46:17,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-10-23 21:46:17,204 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 41 states. [2020-10-23 21:46:21,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:21,598 INFO L93 Difference]: Finished difference Result 211 states and 221 transitions. [2020-10-23 21:46:21,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-23 21:46:21,599 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 151 [2020-10-23 21:46:21,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:21,600 INFO L225 Difference]: With dead ends: 211 [2020-10-23 21:46:21,600 INFO L226 Difference]: Without dead ends: 172 [2020-10-23 21:46:21,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1803, Invalid=4359, Unknown=0, NotChecked=0, Total=6162 [2020-10-23 21:46:21,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-23 21:46:21,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-10-23 21:46:21,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-23 21:46:21,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-10-23 21:46:21,631 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-10-23 21:46:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:21,632 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-10-23 21:46:21,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-23 21:46:21,632 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-10-23 21:46:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-23 21:46:21,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:21,633 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 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] [2020-10-23 21:46:21,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 21:46:21,633 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:21,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:21,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1818939656, now seen corresponding path program 18 times [2020-10-23 21:46:21,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:21,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535347953] [2020-10-23 21:46:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:22,851 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:22,853 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:22,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:22,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:46:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:46:27,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535347953] [2020-10-23 21:46:27,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:27,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-10-23 21:46:27,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903688401] [2020-10-23 21:46:27,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-23 21:46:27,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:27,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-23 21:46:27,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2020-10-23 21:46:27,310 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 43 states. [2020-10-23 21:46:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:32,149 INFO L93 Difference]: Finished difference Result 217 states and 227 transitions. [2020-10-23 21:46:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-23 21:46:32,150 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 157 [2020-10-23 21:46:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:32,151 INFO L225 Difference]: With dead ends: 217 [2020-10-23 21:46:32,152 INFO L226 Difference]: Without dead ends: 178 [2020-10-23 21:46:32,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1997, Invalid=4809, Unknown=0, NotChecked=0, Total=6806 [2020-10-23 21:46:32,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-23 21:46:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-10-23 21:46:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-23 21:46:32,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2020-10-23 21:46:32,187 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 157 [2020-10-23 21:46:32,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:32,187 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2020-10-23 21:46:32,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-23 21:46:32,187 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2020-10-23 21:46:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-23 21:46:32,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:32,189 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 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] [2020-10-23 21:46:32,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 21:46:32,190 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:32,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:32,190 INFO L82 PathProgramCache]: Analyzing trace with hash 633386420, now seen corresponding path program 19 times [2020-10-23 21:46:32,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:32,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678223371] [2020-10-23 21:46:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:33,416 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:33,418 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:33,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:33,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:46:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:38,156 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 21:46:38,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678223371] [2020-10-23 21:46:38,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:38,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-10-23 21:46:38,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055334412] [2020-10-23 21:46:38,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-23 21:46:38,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:38,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-23 21:46:38,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2020-10-23 21:46:38,159 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 45 states. [2020-10-23 21:46:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:43,455 INFO L93 Difference]: Finished difference Result 223 states and 233 transitions. [2020-10-23 21:46:43,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-23 21:46:43,459 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 163 [2020-10-23 21:46:43,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:43,460 INFO L225 Difference]: With dead ends: 223 [2020-10-23 21:46:43,460 INFO L226 Difference]: Without dead ends: 184 [2020-10-23 21:46:43,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=2201, Invalid=5281, Unknown=0, NotChecked=0, Total=7482 [2020-10-23 21:46:43,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-23 21:46:43,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-10-23 21:46:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-23 21:46:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2020-10-23 21:46:43,493 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 163 [2020-10-23 21:46:43,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:43,493 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2020-10-23 21:46:43,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-23 21:46:43,493 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2020-10-23 21:46:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-23 21:46:43,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:43,494 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 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] [2020-10-23 21:46:43,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-23 21:46:43,495 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:43,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:43,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2017247376, now seen corresponding path program 20 times [2020-10-23 21:46:43,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:43,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051045656] [2020-10-23 21:46:43,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:44,720 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:44,721 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:44,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:44,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:46:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:49,841 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 21:46:49,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051045656] [2020-10-23 21:46:49,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:49,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-10-23 21:46:49,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591582847] [2020-10-23 21:46:49,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-23 21:46:49,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:49,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-23 21:46:49,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-10-23 21:46:49,844 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand 47 states. [2020-10-23 21:46:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:55,632 INFO L93 Difference]: Finished difference Result 229 states and 239 transitions. [2020-10-23 21:46:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-23 21:46:55,633 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 169 [2020-10-23 21:46:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:55,634 INFO L225 Difference]: With dead ends: 229 [2020-10-23 21:46:55,635 INFO L226 Difference]: Without dead ends: 190 [2020-10-23 21:46:55,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=2415, Invalid=5775, Unknown=0, NotChecked=0, Total=8190 [2020-10-23 21:46:55,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-23 21:46:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-10-23 21:46:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-23 21:46:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-10-23 21:46:55,661 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 169 [2020-10-23 21:46:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:55,662 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-10-23 21:46:55,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-23 21:46:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-10-23 21:46:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-23 21:46:55,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:55,663 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 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] [2020-10-23 21:46:55,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-23 21:46:55,664 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:55,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:55,664 INFO L82 PathProgramCache]: Analyzing trace with hash -284259284, now seen corresponding path program 21 times [2020-10-23 21:46:55,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:55,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023507542] [2020-10-23 21:46:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:56,865 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:56,866 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:56,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:57,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:46:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:02,356 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 21:47:02,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023507542] [2020-10-23 21:47:02,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:02,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-10-23 21:47:02,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998778479] [2020-10-23 21:47:02,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-23 21:47:02,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:02,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-23 21:47:02,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2020-10-23 21:47:02,364 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 49 states. [2020-10-23 21:47:08,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:08,376 INFO L93 Difference]: Finished difference Result 235 states and 245 transitions. [2020-10-23 21:47:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-23 21:47:08,378 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 175 [2020-10-23 21:47:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:08,380 INFO L225 Difference]: With dead ends: 235 [2020-10-23 21:47:08,380 INFO L226 Difference]: Without dead ends: 196 [2020-10-23 21:47:08,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=2639, Invalid=6291, Unknown=0, NotChecked=0, Total=8930 [2020-10-23 21:47:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-23 21:47:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-10-23 21:47:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-23 21:47:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 197 transitions. [2020-10-23 21:47:08,416 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 197 transitions. Word has length 175 [2020-10-23 21:47:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:08,416 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 197 transitions. [2020-10-23 21:47:08,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-23 21:47:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 197 transitions. [2020-10-23 21:47:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-23 21:47:08,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:08,418 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 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] [2020-10-23 21:47:08,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-23 21:47:08,418 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:08,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:08,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1530635288, now seen corresponding path program 22 times [2020-10-23 21:47:08,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:08,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130918478] [2020-10-23 21:47:08,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:09,599 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:09,600 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:09,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:09,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:47:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:15,517 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 21:47:15,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130918478] [2020-10-23 21:47:15,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:15,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-10-23 21:47:15,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175210758] [2020-10-23 21:47:15,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-23 21:47:15,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:15,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-23 21:47:15,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2020-10-23 21:47:15,519 INFO L87 Difference]: Start difference. First operand 192 states and 197 transitions. Second operand 51 states. [2020-10-23 21:47:22,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:22,195 INFO L93 Difference]: Finished difference Result 241 states and 251 transitions. [2020-10-23 21:47:22,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-23 21:47:22,196 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 181 [2020-10-23 21:47:22,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:22,198 INFO L225 Difference]: With dead ends: 241 [2020-10-23 21:47:22,198 INFO L226 Difference]: Without dead ends: 202 [2020-10-23 21:47:22,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=2873, Invalid=6829, Unknown=0, NotChecked=0, Total=9702 [2020-10-23 21:47:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-23 21:47:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-10-23 21:47:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-23 21:47:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-10-23 21:47:22,233 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 181 [2020-10-23 21:47:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:22,233 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-10-23 21:47:22,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-23 21:47:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-10-23 21:47:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-23 21:47:22,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:22,235 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 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] [2020-10-23 21:47:22,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-23 21:47:22,235 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:22,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:22,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2118750556, now seen corresponding path program 23 times [2020-10-23 21:47:22,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:22,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180486099] [2020-10-23 21:47:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:23,403 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:23,404 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:23,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:23,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:47:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:29,832 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 21:47:29,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180486099] [2020-10-23 21:47:29,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:29,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-10-23 21:47:29,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415855436] [2020-10-23 21:47:29,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-23 21:47:29,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:29,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-23 21:47:29,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=2077, Unknown=0, NotChecked=0, Total=2756 [2020-10-23 21:47:29,835 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 53 states. [2020-10-23 21:47:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:36,950 INFO L93 Difference]: Finished difference Result 247 states and 257 transitions. [2020-10-23 21:47:36,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-23 21:47:36,951 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 187 [2020-10-23 21:47:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:36,953 INFO L225 Difference]: With dead ends: 247 [2020-10-23 21:47:36,954 INFO L226 Difference]: Without dead ends: 208 [2020-10-23 21:47:36,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=3117, Invalid=7389, Unknown=0, NotChecked=0, Total=10506 [2020-10-23 21:47:36,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-23 21:47:36,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-10-23 21:47:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-23 21:47:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 209 transitions. [2020-10-23 21:47:36,992 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 209 transitions. Word has length 187 [2020-10-23 21:47:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:36,993 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 209 transitions. [2020-10-23 21:47:36,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-23 21:47:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 209 transitions. [2020-10-23 21:47:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-23 21:47:36,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:36,994 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 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] [2020-10-23 21:47:36,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-23 21:47:36,994 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:36,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1785103456, now seen corresponding path program 24 times [2020-10-23 21:47:36,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:36,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487504583] [2020-10-23 21:47:36,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:38,195 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:38,197 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:38,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:38,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:47:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:45,222 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 21:47:45,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487504583] [2020-10-23 21:47:45,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:45,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2020-10-23 21:47:45,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585514645] [2020-10-23 21:47:45,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-23 21:47:45,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:45,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-23 21:47:45,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2020-10-23 21:47:45,224 INFO L87 Difference]: Start difference. First operand 204 states and 209 transitions. Second operand 55 states. [2020-10-23 21:47:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:53,089 INFO L93 Difference]: Finished difference Result 253 states and 263 transitions. [2020-10-23 21:47:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-23 21:47:53,090 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 193 [2020-10-23 21:47:53,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:53,092 INFO L225 Difference]: With dead ends: 253 [2020-10-23 21:47:53,093 INFO L226 Difference]: Without dead ends: 214 [2020-10-23 21:47:53,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=3371, Invalid=7971, Unknown=0, NotChecked=0, Total=11342 [2020-10-23 21:47:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-23 21:47:53,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-10-23 21:47:53,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-23 21:47:53,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 215 transitions. [2020-10-23 21:47:53,142 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 215 transitions. Word has length 193 [2020-10-23 21:47:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:53,142 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 215 transitions. [2020-10-23 21:47:53,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-23 21:47:53,143 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 215 transitions. [2020-10-23 21:47:53,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-23 21:47:53,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:53,144 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 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] [2020-10-23 21:47:53,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-23 21:47:53,144 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:53,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:53,145 INFO L82 PathProgramCache]: Analyzing trace with hash -888775396, now seen corresponding path program 25 times [2020-10-23 21:47:53,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:53,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062554533] [2020-10-23 21:47:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:54,343 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:54,345 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:54,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:54,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:47:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:01,957 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 21:48:01,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062554533] [2020-10-23 21:48:01,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:01,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2020-10-23 21:48:01,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684412161] [2020-10-23 21:48:01,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-23 21:48:01,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:01,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-23 21:48:01,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2020-10-23 21:48:01,960 INFO L87 Difference]: Start difference. First operand 210 states and 215 transitions. Second operand 57 states. [2020-10-23 21:48:09,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:09,687 INFO L93 Difference]: Finished difference Result 259 states and 269 transitions. [2020-10-23 21:48:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-23 21:48:09,689 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 199 [2020-10-23 21:48:09,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:09,690 INFO L225 Difference]: With dead ends: 259 [2020-10-23 21:48:09,690 INFO L226 Difference]: Without dead ends: 220 [2020-10-23 21:48:09,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=3635, Invalid=8575, Unknown=0, NotChecked=0, Total=12210 [2020-10-23 21:48:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-23 21:48:09,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-10-23 21:48:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-23 21:48:09,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2020-10-23 21:48:09,730 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 199 [2020-10-23 21:48:09,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:09,731 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2020-10-23 21:48:09,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-23 21:48:09,731 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2020-10-23 21:48:09,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-23 21:48:09,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:09,732 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 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] [2020-10-23 21:48:09,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-23 21:48:09,733 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:09,733 INFO L82 PathProgramCache]: Analyzing trace with hash 326613208, now seen corresponding path program 26 times [2020-10-23 21:48:09,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:09,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783332044] [2020-10-23 21:48:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:10,952 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:10,953 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:11,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:11,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:48:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:19,075 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 21:48:19,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783332044] [2020-10-23 21:48:19,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:19,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2020-10-23 21:48:19,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323755512] [2020-10-23 21:48:19,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-23 21:48:19,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:19,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-23 21:48:19,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=2578, Unknown=0, NotChecked=0, Total=3422 [2020-10-23 21:48:19,077 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 59 states. [2020-10-23 21:48:27,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:27,522 INFO L93 Difference]: Finished difference Result 265 states and 275 transitions. [2020-10-23 21:48:27,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-23 21:48:27,523 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 205 [2020-10-23 21:48:27,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:27,526 INFO L225 Difference]: With dead ends: 265 [2020-10-23 21:48:27,526 INFO L226 Difference]: Without dead ends: 226 [2020-10-23 21:48:27,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=3909, Invalid=9201, Unknown=0, NotChecked=0, Total=13110 [2020-10-23 21:48:27,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-23 21:48:27,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-10-23 21:48:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-23 21:48:27,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2020-10-23 21:48:27,568 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 205 [2020-10-23 21:48:27,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:27,569 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2020-10-23 21:48:27,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-23 21:48:27,569 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2020-10-23 21:48:27,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-23 21:48:27,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:27,570 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 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] [2020-10-23 21:48:27,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-23 21:48:27,571 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:27,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:27,571 INFO L82 PathProgramCache]: Analyzing trace with hash 860641172, now seen corresponding path program 27 times [2020-10-23 21:48:27,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:27,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474398723] [2020-10-23 21:48:27,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:28,821 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:28,822 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:28,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:28,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:48:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:37,658 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 21:48:37,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474398723] [2020-10-23 21:48:37,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:37,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2020-10-23 21:48:37,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171831392] [2020-10-23 21:48:37,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-23 21:48:37,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:37,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-23 21:48:37,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=2757, Unknown=0, NotChecked=0, Total=3660 [2020-10-23 21:48:37,660 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand 61 states. [2020-10-23 21:48:46,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:46,854 INFO L93 Difference]: Finished difference Result 271 states and 281 transitions. [2020-10-23 21:48:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-23 21:48:46,855 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 211 [2020-10-23 21:48:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:46,857 INFO L225 Difference]: With dead ends: 271 [2020-10-23 21:48:46,858 INFO L226 Difference]: Without dead ends: 232 [2020-10-23 21:48:46,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=4193, Invalid=9849, Unknown=0, NotChecked=0, Total=14042 [2020-10-23 21:48:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-23 21:48:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-10-23 21:48:46,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-23 21:48:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 233 transitions. [2020-10-23 21:48:46,905 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 233 transitions. Word has length 211 [2020-10-23 21:48:46,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:46,905 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 233 transitions. [2020-10-23 21:48:46,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-23 21:48:46,906 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 233 transitions. [2020-10-23 21:48:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-23 21:48:46,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:46,907 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 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] [2020-10-23 21:48:46,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-23 21:48:46,907 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:46,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:46,908 INFO L82 PathProgramCache]: Analyzing trace with hash 365295952, now seen corresponding path program 28 times [2020-10-23 21:48:46,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:46,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413352381] [2020-10-23 21:48:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:48,214 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:48,216 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:48,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:48,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:48:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:57,660 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 21:48:57,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413352381] [2020-10-23 21:48:57,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:57,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2020-10-23 21:48:57,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343881541] [2020-10-23 21:48:57,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-23 21:48:57,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:57,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-23 21:48:57,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=2942, Unknown=0, NotChecked=0, Total=3906 [2020-10-23 21:48:57,662 INFO L87 Difference]: Start difference. First operand 228 states and 233 transitions. Second operand 63 states. [2020-10-23 21:49:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:07,425 INFO L93 Difference]: Finished difference Result 277 states and 287 transitions. [2020-10-23 21:49:07,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-23 21:49:07,426 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 217 [2020-10-23 21:49:07,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:07,428 INFO L225 Difference]: With dead ends: 277 [2020-10-23 21:49:07,429 INFO L226 Difference]: Without dead ends: 238 [2020-10-23 21:49:07,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=4487, Invalid=10519, Unknown=0, NotChecked=0, Total=15006 [2020-10-23 21:49:07,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-23 21:49:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-10-23 21:49:07,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-23 21:49:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 239 transitions. [2020-10-23 21:49:07,461 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 239 transitions. Word has length 217 [2020-10-23 21:49:07,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:07,462 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 239 transitions. [2020-10-23 21:49:07,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-23 21:49:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 239 transitions. [2020-10-23 21:49:07,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-23 21:49:07,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:07,463 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 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] [2020-10-23 21:49:07,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-23 21:49:07,464 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:07,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:07,464 INFO L82 PathProgramCache]: Analyzing trace with hash 500588044, now seen corresponding path program 29 times [2020-10-23 21:49:07,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:07,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588741243] [2020-10-23 21:49:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:08,744 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:08,746 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:08,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:08,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:49:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:19,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588741243] [2020-10-23 21:49:19,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:19,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2020-10-23 21:49:19,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626341193] [2020-10-23 21:49:19,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-23 21:49:19,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:19,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-23 21:49:19,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=3133, Unknown=0, NotChecked=0, Total=4160 [2020-10-23 21:49:19,049 INFO L87 Difference]: Start difference. First operand 234 states and 239 transitions. Second operand 65 states. [2020-10-23 21:49:29,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:29,304 INFO L93 Difference]: Finished difference Result 283 states and 293 transitions. [2020-10-23 21:49:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-10-23 21:49:29,307 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 223 [2020-10-23 21:49:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:29,308 INFO L225 Difference]: With dead ends: 283 [2020-10-23 21:49:29,308 INFO L226 Difference]: Without dead ends: 244 [2020-10-23 21:49:29,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=4791, Invalid=11211, Unknown=0, NotChecked=0, Total=16002 [2020-10-23 21:49:29,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-23 21:49:29,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2020-10-23 21:49:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-23 21:49:29,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-10-23 21:49:29,345 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 223 [2020-10-23 21:49:29,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:29,346 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-10-23 21:49:29,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-23 21:49:29,346 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-10-23 21:49:29,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-23 21:49:29,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:29,347 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 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] [2020-10-23 21:49:29,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-23 21:49:29,347 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:29,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:29,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1575008824, now seen corresponding path program 30 times [2020-10-23 21:49:29,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:29,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705569025] [2020-10-23 21:49:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:30,656 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:30,658 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:30,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:30,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:49:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:41,533 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 21:49:41,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705569025] [2020-10-23 21:49:41,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:41,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2020-10-23 21:49:41,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901084984] [2020-10-23 21:49:41,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-23 21:49:41,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:41,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-23 21:49:41,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=3330, Unknown=0, NotChecked=0, Total=4422 [2020-10-23 21:49:41,535 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 67 states. [2020-10-23 21:49:53,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:53,619 INFO L93 Difference]: Finished difference Result 289 states and 299 transitions. [2020-10-23 21:49:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-10-23 21:49:53,621 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 229 [2020-10-23 21:49:53,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:53,623 INFO L225 Difference]: With dead ends: 289 [2020-10-23 21:49:53,624 INFO L226 Difference]: Without dead ends: 250 [2020-10-23 21:49:53,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3063 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=5105, Invalid=11925, Unknown=0, NotChecked=0, Total=17030 [2020-10-23 21:49:53,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-23 21:49:53,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2020-10-23 21:49:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-23 21:49:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2020-10-23 21:49:53,693 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 229 [2020-10-23 21:49:53,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:53,693 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2020-10-23 21:49:53,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-23 21:49:53,693 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2020-10-23 21:49:53,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-23 21:49:53,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:53,695 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 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] [2020-10-23 21:49:53,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-23 21:49:53,695 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:53,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1760718980, now seen corresponding path program 31 times [2020-10-23 21:49:53,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:53,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171649009] [2020-10-23 21:49:53,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:55,023 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:55,024 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:55,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:55,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:49:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:06,661 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 21:50:06,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171649009] [2020-10-23 21:50:06,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:06,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2020-10-23 21:50:06,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125532127] [2020-10-23 21:50:06,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-23 21:50:06,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:06,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-23 21:50:06,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2020-10-23 21:50:06,665 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 69 states. [2020-10-23 21:50:07,513 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-23 21:50:19,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:19,360 INFO L93 Difference]: Finished difference Result 295 states and 305 transitions. [2020-10-23 21:50:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-10-23 21:50:19,362 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 235 [2020-10-23 21:50:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:19,364 INFO L225 Difference]: With dead ends: 295 [2020-10-23 21:50:19,365 INFO L226 Difference]: Without dead ends: 256 [2020-10-23 21:50:19,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=5429, Invalid=12661, Unknown=0, NotChecked=0, Total=18090 [2020-10-23 21:50:19,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-23 21:50:19,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-10-23 21:50:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-23 21:50:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 257 transitions. [2020-10-23 21:50:19,423 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 257 transitions. Word has length 235 [2020-10-23 21:50:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:19,423 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 257 transitions. [2020-10-23 21:50:19,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-23 21:50:19,423 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 257 transitions. [2020-10-23 21:50:19,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-23 21:50:19,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:19,425 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 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] [2020-10-23 21:50:19,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-23 21:50:19,425 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:19,426 INFO L82 PathProgramCache]: Analyzing trace with hash 609328704, now seen corresponding path program 32 times [2020-10-23 21:50:19,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:19,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237767456] [2020-10-23 21:50:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:20,795 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:20,797 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:20,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:20,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:50:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:33,078 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 21:50:33,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237767456] [2020-10-23 21:50:33,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:33,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2020-10-23 21:50:33,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584689976] [2020-10-23 21:50:33,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-23 21:50:33,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:33,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-23 21:50:33,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=3742, Unknown=0, NotChecked=0, Total=4970 [2020-10-23 21:50:33,083 INFO L87 Difference]: Start difference. First operand 252 states and 257 transitions. Second operand 71 states. [2020-10-23 21:50:34,495 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-23 21:50:48,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:48,135 INFO L93 Difference]: Finished difference Result 301 states and 311 transitions. [2020-10-23 21:50:48,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-10-23 21:50:48,138 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 241 [2020-10-23 21:50:48,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:48,140 INFO L225 Difference]: With dead ends: 301 [2020-10-23 21:50:48,140 INFO L226 Difference]: Without dead ends: 262 [2020-10-23 21:50:48,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=5763, Invalid=13419, Unknown=0, NotChecked=0, Total=19182 [2020-10-23 21:50:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-23 21:50:48,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2020-10-23 21:50:48,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-23 21:50:48,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 263 transitions. [2020-10-23 21:50:48,198 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 263 transitions. Word has length 241 [2020-10-23 21:50:48,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:48,199 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 263 transitions. [2020-10-23 21:50:48,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-23 21:50:48,199 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 263 transitions. [2020-10-23 21:50:48,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-23 21:50:48,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:48,201 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 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] [2020-10-23 21:50:48,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-23 21:50:48,201 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:48,202 INFO L82 PathProgramCache]: Analyzing trace with hash -303132932, now seen corresponding path program 33 times [2020-10-23 21:50:48,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:48,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172991592] [2020-10-23 21:50:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:49,605 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:49,606 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:49,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:49,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:50:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:02,900 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 21:51:02,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172991592] [2020-10-23 21:51:02,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:51:02,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2020-10-23 21:51:02,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315227231] [2020-10-23 21:51:02,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-23 21:51:02,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:51:02,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-23 21:51:02,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=3957, Unknown=0, NotChecked=0, Total=5256 [2020-10-23 21:51:02,903 INFO L87 Difference]: Start difference. First operand 258 states and 263 transitions. Second operand 73 states. [2020-10-23 21:51:04,473 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-23 21:51:19,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:51:19,628 INFO L93 Difference]: Finished difference Result 307 states and 317 transitions. [2020-10-23 21:51:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-10-23 21:51:19,631 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 247 [2020-10-23 21:51:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:51:19,633 INFO L225 Difference]: With dead ends: 307 [2020-10-23 21:51:19,633 INFO L226 Difference]: Without dead ends: 268 [2020-10-23 21:51:19,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=6107, Invalid=14199, Unknown=0, NotChecked=0, Total=20306 [2020-10-23 21:51:19,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-23 21:51:19,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2020-10-23 21:51:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-23 21:51:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 269 transitions. [2020-10-23 21:51:19,713 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 269 transitions. Word has length 247 [2020-10-23 21:51:19,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:51:19,714 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 269 transitions. [2020-10-23 21:51:19,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-23 21:51:19,714 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 269 transitions. [2020-10-23 21:51:19,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-23 21:51:19,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:51:19,717 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 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] [2020-10-23 21:51:19,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-23 21:51:19,717 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:51:19,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:51:19,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1020591432, now seen corresponding path program 34 times [2020-10-23 21:51:19,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:51:19,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728837900] [2020-10-23 21:51:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:51:21,202 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:51:21,204 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:51:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:21,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:51:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:21,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:51:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:35,905 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 21:51:35,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728837900] [2020-10-23 21:51:35,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:51:35,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2020-10-23 21:51:35,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187989567] [2020-10-23 21:51:35,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-23 21:51:35,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:51:35,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-23 21:51:35,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1372, Invalid=4178, Unknown=0, NotChecked=0, Total=5550 [2020-10-23 21:51:35,908 INFO L87 Difference]: Start difference. First operand 264 states and 269 transitions. Second operand 75 states. [2020-10-23 21:51:36,871 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-23 21:51:52,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:51:52,421 INFO L93 Difference]: Finished difference Result 313 states and 323 transitions. [2020-10-23 21:51:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-10-23 21:51:52,423 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 253 [2020-10-23 21:51:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:51:52,425 INFO L225 Difference]: With dead ends: 313 [2020-10-23 21:51:52,426 INFO L226 Difference]: Without dead ends: 274 [2020-10-23 21:51:52,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=6461, Invalid=15001, Unknown=0, NotChecked=0, Total=21462 [2020-10-23 21:51:52,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-23 21:51:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2020-10-23 21:51:52,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-23 21:51:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 275 transitions. [2020-10-23 21:51:52,473 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 275 transitions. Word has length 253 [2020-10-23 21:51:52,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:51:52,474 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 275 transitions. [2020-10-23 21:51:52,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-23 21:51:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 275 transitions. [2020-10-23 21:51:52,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-23 21:51:52,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:51:52,476 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 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] [2020-10-23 21:51:52,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-23 21:51:52,477 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:51:52,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:51:52,477 INFO L82 PathProgramCache]: Analyzing trace with hash 18397556, now seen corresponding path program 35 times [2020-10-23 21:51:52,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:51:52,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37863296] [2020-10-23 21:51:52,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:51:53,963 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:51:53,964 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:51:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:54,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:51:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:54,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:51:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:52:09,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37863296] [2020-10-23 21:52:09,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:52:09,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2020-10-23 21:52:09,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999366791] [2020-10-23 21:52:09,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-23 21:52:09,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:52:09,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-23 21:52:09,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=4405, Unknown=0, NotChecked=0, Total=5852 [2020-10-23 21:52:09,912 INFO L87 Difference]: Start difference. First operand 270 states and 275 transitions. Second operand 77 states. [2020-10-23 21:52:11,401 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-23 21:52:29,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:52:29,099 INFO L93 Difference]: Finished difference Result 319 states and 329 transitions. [2020-10-23 21:52:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-10-23 21:52:29,102 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 259 [2020-10-23 21:52:29,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:52:29,105 INFO L225 Difference]: With dead ends: 319 [2020-10-23 21:52:29,105 INFO L226 Difference]: Without dead ends: 280 [2020-10-23 21:52:29,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=6825, Invalid=15825, Unknown=0, NotChecked=0, Total=22650 [2020-10-23 21:52:29,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-23 21:52:29,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2020-10-23 21:52:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-23 21:52:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 281 transitions. [2020-10-23 21:52:29,153 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 281 transitions. Word has length 259 [2020-10-23 21:52:29,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:52:29,154 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 281 transitions. [2020-10-23 21:52:29,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-23 21:52:29,154 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 281 transitions. [2020-10-23 21:52:29,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-23 21:52:29,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:52:29,156 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 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] [2020-10-23 21:52:29,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-23 21:52:29,156 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:52:29,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:52:29,157 INFO L82 PathProgramCache]: Analyzing trace with hash -528911568, now seen corresponding path program 36 times [2020-10-23 21:52:29,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:52:29,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365342003] [2020-10-23 21:52:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:52:29,271 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:52:30,737 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:52:30,738 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:52:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:30,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:52:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:30,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:52:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:48,352 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 21:52:48,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365342003] [2020-10-23 21:52:48,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:52:48,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2020-10-23 21:52:48,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822436436] [2020-10-23 21:52:48,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-23 21:52:48,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:52:48,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-23 21:52:48,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2020-10-23 21:52:48,355 INFO L87 Difference]: Start difference. First operand 276 states and 281 transitions. Second operand 79 states. [2020-10-23 21:52:49,706 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-23 21:53:08,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:53:08,652 INFO L93 Difference]: Finished difference Result 325 states and 335 transitions. [2020-10-23 21:53:08,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-10-23 21:53:08,656 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 265 [2020-10-23 21:53:08,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:53:08,658 INFO L225 Difference]: With dead ends: 325 [2020-10-23 21:53:08,658 INFO L226 Difference]: Without dead ends: 286 [2020-10-23 21:53:08,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=7199, Invalid=16671, Unknown=0, NotChecked=0, Total=23870 [2020-10-23 21:53:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-23 21:53:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-10-23 21:53:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-23 21:53:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 287 transitions. [2020-10-23 21:53:08,715 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 287 transitions. Word has length 265 [2020-10-23 21:53:08,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:53:08,716 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 287 transitions. [2020-10-23 21:53:08,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-23 21:53:08,716 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 287 transitions. [2020-10-23 21:53:08,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-23 21:53:08,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:53:08,718 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 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] [2020-10-23 21:53:08,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-23 21:53:08,718 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:53:08,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:53:08,719 INFO L82 PathProgramCache]: Analyzing trace with hash -239144980, now seen corresponding path program 37 times [2020-10-23 21:53:08,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:53:08,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113488744] [2020-10-23 21:53:08,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:53:10,335 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:53:10,336 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:53:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:10,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:53:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:10,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:53:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:29,626 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 21:53:29,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113488744] [2020-10-23 21:53:29,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:53:29,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2020-10-23 21:53:29,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365372643] [2020-10-23 21:53:29,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-23 21:53:29,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:53:29,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-23 21:53:29,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=4877, Unknown=0, NotChecked=0, Total=6480 [2020-10-23 21:53:29,629 INFO L87 Difference]: Start difference. First operand 282 states and 287 transitions. Second operand 81 states. [2020-10-23 21:53:31,394 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-23 21:53:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:53:53,369 INFO L93 Difference]: Finished difference Result 331 states and 341 transitions. [2020-10-23 21:53:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-10-23 21:53:53,372 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 271 [2020-10-23 21:53:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:53:53,373 INFO L225 Difference]: With dead ends: 331 [2020-10-23 21:53:53,374 INFO L226 Difference]: Without dead ends: 292 [2020-10-23 21:53:53,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=7583, Invalid=17539, Unknown=0, NotChecked=0, Total=25122 [2020-10-23 21:53:53,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-23 21:53:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2020-10-23 21:53:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-23 21:53:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 293 transitions. [2020-10-23 21:53:53,445 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 293 transitions. Word has length 271 [2020-10-23 21:53:53,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:53:53,445 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 293 transitions. [2020-10-23 21:53:53,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-23 21:53:53,445 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 293 transitions. [2020-10-23 21:53:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-23 21:53:53,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:53:53,447 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 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] [2020-10-23 21:53:53,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-23 21:53:53,448 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:53:53,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:53:53,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1727336536, now seen corresponding path program 38 times [2020-10-23 21:53:53,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:53:53,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567585081] [2020-10-23 21:53:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:53:54,164 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:53:55,085 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:53:55,087 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:53:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:55,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:53:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:55,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:53:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:16,688 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 21:54:16,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567585081] [2020-10-23 21:54:16,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:54:16,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2020-10-23 21:54:16,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186468711] [2020-10-23 21:54:16,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-10-23 21:54:16,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:54:16,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-10-23 21:54:16,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5122, Unknown=0, NotChecked=0, Total=6806 [2020-10-23 21:54:16,691 INFO L87 Difference]: Start difference. First operand 288 states and 293 transitions. Second operand 83 states. [2020-10-23 21:54:17,881 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-23 21:54:41,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:54:41,503 INFO L93 Difference]: Finished difference Result 337 states and 347 transitions. [2020-10-23 21:54:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-10-23 21:54:41,507 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 277 [2020-10-23 21:54:41,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:54:41,510 INFO L225 Difference]: With dead ends: 337 [2020-10-23 21:54:41,510 INFO L226 Difference]: Without dead ends: 298 [2020-10-23 21:54:41,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=7977, Invalid=18429, Unknown=0, NotChecked=0, Total=26406 [2020-10-23 21:54:41,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-23 21:54:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2020-10-23 21:54:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-23 21:54:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 299 transitions. [2020-10-23 21:54:41,592 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 299 transitions. Word has length 277 [2020-10-23 21:54:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:54:41,592 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 299 transitions. [2020-10-23 21:54:41,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-10-23 21:54:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 299 transitions. [2020-10-23 21:54:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-23 21:54:41,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:54:41,594 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 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] [2020-10-23 21:54:41,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-23 21:54:41,595 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:54:41,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:54:41,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1976618396, now seen corresponding path program 39 times [2020-10-23 21:54:41,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:54:41,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461993506] [2020-10-23 21:54:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:54:41,718 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:54:41,825 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:54:42,153 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:54:42,271 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-23 21:54:42,521 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:54:42,640 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:54:42,867 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:54:43,425 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:54:43,603 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:54:43,605 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:54:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:43,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:54:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:43,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:54:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:46,086 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:54:48,142 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:54:49,071 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:54:50,114 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:54:55,368 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:54:56,101 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:54:56,495 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:05,905 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:06,423 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:07,823 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 21:55:07,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461993506] [2020-10-23 21:55:07,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:55:07,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2020-10-23 21:55:07,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243805994] [2020-10-23 21:55:07,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-23 21:55:07,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:55:07,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-23 21:55:07,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=5373, Unknown=0, NotChecked=0, Total=7140 [2020-10-23 21:55:07,826 INFO L87 Difference]: Start difference. First operand 294 states and 299 transitions. Second operand 85 states. [2020-10-23 21:55:08,548 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-23 21:55:09,126 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-23 21:55:35,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:55:35,556 INFO L93 Difference]: Finished difference Result 343 states and 353 transitions. [2020-10-23 21:55:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-10-23 21:55:35,559 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 283 [2020-10-23 21:55:35,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:55:35,561 INFO L225 Difference]: With dead ends: 343 [2020-10-23 21:55:35,562 INFO L226 Difference]: Without dead ends: 304 [2020-10-23 21:55:35,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 48.4s TimeCoverageRelationStatistics Valid=8381, Invalid=19341, Unknown=0, NotChecked=0, Total=27722 [2020-10-23 21:55:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-23 21:55:35,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2020-10-23 21:55:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-23 21:55:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 305 transitions. [2020-10-23 21:55:35,684 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 305 transitions. Word has length 283 [2020-10-23 21:55:35,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:55:35,684 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 305 transitions. [2020-10-23 21:55:35,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-23 21:55:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 305 transitions. [2020-10-23 21:55:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-23 21:55:35,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:55:35,687 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 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] [2020-10-23 21:55:35,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-23 21:55:35,688 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:55:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:55:35,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1152219168, now seen corresponding path program 40 times [2020-10-23 21:55:35,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:55:35,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118365859] [2020-10-23 21:55:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:55:35,805 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:55:35,919 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:55:36,210 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:55:36,516 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:55:36,623 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:55:36,832 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:55:37,131 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-23 21:55:37,435 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:55:37,625 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:55:37,626 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:55:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:37,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:55:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:37,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:55:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:38,142 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:38,275 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:38,423 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:38,569 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:38,719 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:39,043 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:39,216 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:39,551 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:39,745 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:40,706 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:41,132 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:41,352 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:41,584 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:42,293 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:42,537 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:42,807 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:43,060 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:43,313 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:43,844 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:44,112 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:44,404 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:44,696 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:45,263 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:45,896 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:46,214 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:46,523 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:46,841 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:47,833 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:48,510 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:48,871 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:49,220 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:49,582 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:49,938 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:50,320 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:50,698 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:51,076 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:51,451 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:51,868 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:52,268 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:53,073 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:53,496 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:53,915 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:55,224 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:55,662 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:56,106 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:56,575 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:57,035 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:58,460 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:58,942 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:59,422 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:55:59,919 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:00,413 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:00,906 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:01,423 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:01,956 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:02,484 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:03,013 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:03,541 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:04,078 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:04,629 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:05,188 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:05,652 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 21:56:05,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118365859] [2020-10-23 21:56:05,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:56:05,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2020-10-23 21:56:05,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569710371] [2020-10-23 21:56:05,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-10-23 21:56:05,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:56:05,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-10-23 21:56:05,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=5630, Unknown=0, NotChecked=0, Total=7482 [2020-10-23 21:56:05,655 INFO L87 Difference]: Start difference. First operand 300 states and 305 transitions. Second operand 87 states. [2020-10-23 21:56:06,486 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-23 21:56:07,117 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-23 21:56:36,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:56:36,462 INFO L93 Difference]: Finished difference Result 349 states and 359 transitions. [2020-10-23 21:56:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-10-23 21:56:36,466 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 289 [2020-10-23 21:56:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:56:36,467 INFO L225 Difference]: With dead ends: 349 [2020-10-23 21:56:36,468 INFO L226 Difference]: Without dead ends: 310 [2020-10-23 21:56:36,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 55.0s TimeCoverageRelationStatistics Valid=8795, Invalid=20275, Unknown=0, NotChecked=0, Total=29070 [2020-10-23 21:56:36,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-23 21:56:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2020-10-23 21:56:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-23 21:56:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 311 transitions. [2020-10-23 21:56:36,545 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 311 transitions. Word has length 289 [2020-10-23 21:56:36,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:56:36,546 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 311 transitions. [2020-10-23 21:56:36,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-10-23 21:56:36,546 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 311 transitions. [2020-10-23 21:56:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-23 21:56:36,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:56:36,549 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 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] [2020-10-23 21:56:36,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-23 21:56:36,549 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:56:36,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:56:36,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1883799332, now seen corresponding path program 41 times [2020-10-23 21:56:36,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:56:36,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539412182] [2020-10-23 21:56:36,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:56:36,676 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:56:36,793 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:56:37,105 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:56:37,217 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-10-23 21:56:37,447 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:56:37,564 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:56:37,774 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:56:37,884 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-23 21:56:38,096 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-23 21:56:38,206 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:56:38,428 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:56:38,539 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-23 21:56:38,638 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:56:38,640 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:56:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:38,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:56:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:38,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:56:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:39,212 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:39,362 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:39,517 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:39,678 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:39,847 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:40,008 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:40,182 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:40,362 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:40,550 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:40,749 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:40,947 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:41,154 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:41,366 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:41,576 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:41,797 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:42,018 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:42,251 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:42,487 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:42,742 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:42,994 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:43,245 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:43,493 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:43,755 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:44,033 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:44,314 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:44,603 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:44,899 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:45,195 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:45,499 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:45,807 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:46,117 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:46,456 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:46,782 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:47,103 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:47,440 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:47,780 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:48,124 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:48,473 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:48,834 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:49,198 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:49,573 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:49,972 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:50,351 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:50,759 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:51,197 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:51,616 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:52,042 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:52,457 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:52,866 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:53,294 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:53,769 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:54,210 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:54,660 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:55,089 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:55,538 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:56,029 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:56,501 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:56,969 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:57,456 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:57,967 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:58,455 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:58,937 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:59,445 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:56:59,957 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:00,467 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:01,002 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:01,547 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:02,081 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:02,619 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:03,172 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:03,727 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:04,280 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:04,855 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:05,442 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:06,019 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:06,595 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:07,196 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:07,789 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:08,391 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:09,018 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:09,631 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:10,242 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:10,885 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:11,397 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 21:57:11,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539412182] [2020-10-23 21:57:11,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:57:11,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2020-10-23 21:57:11,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015785963] [2020-10-23 21:57:11,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-10-23 21:57:11,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:57:11,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-10-23 21:57:11,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=5893, Unknown=0, NotChecked=0, Total=7832 [2020-10-23 21:57:11,400 INFO L87 Difference]: Start difference. First operand 306 states and 311 transitions. Second operand 89 states. [2020-10-23 21:57:12,144 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-23 21:57:12,514 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-23 21:57:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:57:46,014 INFO L93 Difference]: Finished difference Result 355 states and 365 transitions. [2020-10-23 21:57:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-10-23 21:57:46,019 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 295 [2020-10-23 21:57:46,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:57:46,021 INFO L225 Difference]: With dead ends: 355 [2020-10-23 21:57:46,021 INFO L226 Difference]: Without dead ends: 316 [2020-10-23 21:57:46,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5538 ImplicationChecksByTransitivity, 64.3s TimeCoverageRelationStatistics Valid=9219, Invalid=21231, Unknown=0, NotChecked=0, Total=30450 [2020-10-23 21:57:46,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-23 21:57:46,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-10-23 21:57:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-23 21:57:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 317 transitions. [2020-10-23 21:57:46,123 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 317 transitions. Word has length 295 [2020-10-23 21:57:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:57:46,123 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 317 transitions. [2020-10-23 21:57:46,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-10-23 21:57:46,123 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 317 transitions. [2020-10-23 21:57:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-23 21:57:46,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:57:46,125 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 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] [2020-10-23 21:57:46,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-23 21:57:46,125 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:57:46,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:57:46,126 INFO L82 PathProgramCache]: Analyzing trace with hash -164688744, now seen corresponding path program 42 times [2020-10-23 21:57:46,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:57:46,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402700945] [2020-10-23 21:57:46,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:57:46,256 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:57:46,372 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:57:46,680 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:57:46,787 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-23 21:57:47,003 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:57:47,122 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:57:47,326 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:57:47,435 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-10-23 21:57:47,638 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-23 21:57:47,756 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:57:47,984 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:57:48,092 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-23 21:57:48,187 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:57:48,188 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:57:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:48,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:57:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:48,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:57:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:48,700 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:48,861 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:49,007 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:49,155 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:49,316 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:49,468 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:49,633 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:49,808 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:49,977 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:50,164 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:50,374 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:50,585 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:50,804 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:51,024 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:51,255 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:51,486 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:51,724 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:51,968 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:52,238 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:52,501 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:52,776 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:53,051 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:53,335 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:53,620 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:53,915 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:54,245 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:54,578 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:54,912 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:55,240 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:55,588 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:55,942 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:56,306 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:56,667 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:57,035 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:57,409 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:57,791 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:58,177 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:58,577 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:58,980 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:59,384 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:59,792 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:00,224 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:00,638 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:01,070 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:01,503 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:01,943 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:02,399 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:02,862 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:03,328 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:03,797 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:04,273 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:04,760 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:05,237 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:05,715 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:06,217 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:06,727 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:58:07,237 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12