/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:13:12,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:13:12,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:13:12,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 02:13:12,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 02:13:12,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 02:13:12,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 02:13:12,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 02:13:12,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 02:13:12,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 02:13:12,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 02:13:12,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 02:13:12,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:13:12,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:13:12,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:13:12,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:13:12,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:13:12,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:13:12,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:13:12,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:13:12,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:13:12,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:13:12,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:13:12,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:13:12,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 02:13:12,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 02:13:12,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 02:13:12,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 02:13:12,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 02:13:12,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 02:13:12,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 02:13:12,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 02:13:12,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 02:13:12,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 02:13:12,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 02:13:12,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 02:13:12,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 02:13:12,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 02:13:12,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:13:12,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:13:12,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:13:12,788 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 02:13:12,801 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:13:12,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:13:12,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:13:12,804 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:13:12,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:13:12,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:13:12,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:13:12,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:13:12,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:13:12,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:13:12,806 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:13:12,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:13:12,807 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:13:12,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:13:12,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:13:12,807 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:13:12,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:13:12,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:13:12,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:13:12,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:13:12,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:13:12,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:13:12,809 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:13:13,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:13:13,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:13:13,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:13:13,306 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:13:13,307 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:13:13,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c [2020-11-07 02:13:13,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3838098cf/3a3bed9cec6a40f685b2ab9a502f9a64/FLAGe79b6fb62 [2020-11-07 02:13:14,057 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:13:14,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c [2020-11-07 02:13:14,065 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3838098cf/3a3bed9cec6a40f685b2ab9a502f9a64/FLAGe79b6fb62 [2020-11-07 02:13:14,444 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3838098cf/3a3bed9cec6a40f685b2ab9a502f9a64 [2020-11-07 02:13:14,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:13:14,458 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:13:14,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:13:14,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:13:14,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:13:14,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:14" (1/1) ... [2020-11-07 02:13:14,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@420216ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:14, skipping insertion in model container [2020-11-07 02:13:14,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:14" (1/1) ... [2020-11-07 02:13:14,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:13:14,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:13:14,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:13:14,718 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:13:14,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:13:14,760 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:13:14,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:14 WrapperNode [2020-11-07 02:13:14,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:13:14,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:13:14,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:13:14,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:13:14,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:14" (1/1) ... [2020-11-07 02:13:14,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:14" (1/1) ... [2020-11-07 02:13:14,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:14" (1/1) ... [2020-11-07 02:13:14,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:14" (1/1) ... [2020-11-07 02:13:14,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:14" (1/1) ... [2020-11-07 02:13:14,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:14" (1/1) ... [2020-11-07 02:13:14,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:14" (1/1) ... [2020-11-07 02:13:14,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:13:14,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:13:14,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:13:14,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:13:14,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:13:14,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:13:14,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:13:14,891 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:13:14,892 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:13:14,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 02:13:14,893 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:13:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:13:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:13:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:13:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:13:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:13:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:13:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 02:13:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:13:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:13:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:13:14,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:13:14,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:13:14,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:13:14,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:13:15,251 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:13:15,251 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 02:13:15,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:13:15 BoogieIcfgContainer [2020-11-07 02:13:15,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:13:15,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:13:15,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:13:15,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:13:15,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:13:14" (1/3) ... [2020-11-07 02:13:15,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609694b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:13:15, skipping insertion in model container [2020-11-07 02:13:15,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:14" (2/3) ... [2020-11-07 02:13:15,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609694b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:13:15, skipping insertion in model container [2020-11-07 02:13:15,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:13:15" (3/3) ... [2020-11-07 02:13:15,262 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt8.c [2020-11-07 02:13:15,280 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:13:15,284 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:13:15,297 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:13:15,321 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:13:15,323 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:13:15,323 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:13:15,323 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:13:15,323 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:13:15,324 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:13:15,324 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:13:15,324 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:13:15,342 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-11-07 02:13:15,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 02:13:15,353 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:15,354 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] [2020-11-07 02:13:15,354 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:15,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:15,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1693041709, now seen corresponding path program 1 times [2020-11-07 02:13:15,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:15,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646569667] [2020-11-07 02:13:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:15,448 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:16,291 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-11-07 02:13:16,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:13:16,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646569667] [2020-11-07 02:13:16,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:16,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 02:13:16,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230444511] [2020-11-07 02:13:16,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 02:13:16,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 02:13:16,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-11-07 02:13:16,446 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 16 states. [2020-11-07 02:13:17,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:17,901 INFO L93 Difference]: Finished difference Result 185 states and 253 transitions. [2020-11-07 02:13:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 02:13:17,903 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-11-07 02:13:17,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:17,915 INFO L225 Difference]: With dead ends: 185 [2020-11-07 02:13:17,915 INFO L226 Difference]: Without dead ends: 131 [2020-11-07 02:13:17,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2020-11-07 02:13:17,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-07 02:13:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 61. [2020-11-07 02:13:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-07 02:13:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-11-07 02:13:17,990 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 36 [2020-11-07 02:13:17,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:17,991 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-11-07 02:13:17,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 02:13:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-11-07 02:13:17,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-07 02:13:17,993 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:17,993 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:13:17,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:13:17,994 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:17,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:17,995 INFO L82 PathProgramCache]: Analyzing trace with hash -184005851, now seen corresponding path program 1 times [2020-11-07 02:13:17,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:17,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729206411] [2020-11-07 02:13:17,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:20,199 WARN L194 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 02:13:27,354 WARN L194 SmtUtils]: Spent 7.14 s on a formula simplification. DAG size of input: 476 DAG size of output: 204 [2020-11-07 02:13:27,388 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:27,396 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:27,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:27,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 02:13:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:13:27,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729206411] [2020-11-07 02:13:27,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:27,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:13:27,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004911313] [2020-11-07 02:13:27,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:13:27,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:27,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:13:27,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:13:27,645 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 5 states. [2020-11-07 02:13:30,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:30,148 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2020-11-07 02:13:30,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:13:30,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-11-07 02:13:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:30,151 INFO L225 Difference]: With dead ends: 102 [2020-11-07 02:13:30,151 INFO L226 Difference]: Without dead ends: 77 [2020-11-07 02:13:30,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:13:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-07 02:13:30,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2020-11-07 02:13:30,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-07 02:13:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-11-07 02:13:30,195 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 45 [2020-11-07 02:13:30,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:30,196 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-11-07 02:13:30,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:13:30,197 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-11-07 02:13:30,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-07 02:13:30,198 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:30,199 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:13:30,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:13:30,199 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:30,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:30,200 INFO L82 PathProgramCache]: Analyzing trace with hash 7172381, now seen corresponding path program 1 times [2020-11-07 02:13:30,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:30,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474661358] [2020-11-07 02:13:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:32,299 WARN L194 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-07 02:13:38,014 WARN L194 SmtUtils]: Spent 5.62 s on a formula simplification. DAG size of input: 533 DAG size of output: 259 [2020-11-07 02:13:38,024 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:38,026 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:38,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:38,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 02:13:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:13:38,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474661358] [2020-11-07 02:13:38,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:38,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:13:38,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360577588] [2020-11-07 02:13:38,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:13:38,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:38,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:13:38,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:13:38,247 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 5 states. [2020-11-07 02:13:38,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:38,700 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2020-11-07 02:13:38,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:13:38,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-11-07 02:13:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:38,702 INFO L225 Difference]: With dead ends: 101 [2020-11-07 02:13:38,703 INFO L226 Difference]: Without dead ends: 76 [2020-11-07 02:13:38,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:13:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-07 02:13:38,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-11-07 02:13:38,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-07 02:13:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-11-07 02:13:38,751 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 46 [2020-11-07 02:13:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:38,753 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-11-07 02:13:38,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:13:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-11-07 02:13:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 02:13:38,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:38,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:13:38,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:13:38,760 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:38,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:38,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1626182229, now seen corresponding path program 1 times [2020-11-07 02:13:38,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:38,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524325979] [2020-11-07 02:13:38,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:40,851 WARN L194 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-07 02:13:43,011 WARN L194 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 02:13:50,225 WARN L194 SmtUtils]: Spent 7.21 s on a formula simplification. DAG size of input: 533 DAG size of output: 232 [2020-11-07 02:13:50,232 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:50,233 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:50,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:50,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 02:13:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:13:50,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524325979] [2020-11-07 02:13:50,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:50,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:13:50,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908103741] [2020-11-07 02:13:50,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:13:50,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:50,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:13:50,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:13:50,424 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 5 states. [2020-11-07 02:13:50,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:50,782 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-11-07 02:13:50,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:13:50,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-11-07 02:13:50,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:50,784 INFO L225 Difference]: With dead ends: 91 [2020-11-07 02:13:50,784 INFO L226 Difference]: Without dead ends: 66 [2020-11-07 02:13:50,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:13:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-07 02:13:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-11-07 02:13:50,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-07 02:13:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-11-07 02:13:50,813 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 47 [2020-11-07 02:13:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:50,814 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-11-07 02:13:50,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:13:50,814 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-11-07 02:13:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-07 02:13:50,815 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:50,815 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:13:50,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:13:50,816 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:50,816 INFO L82 PathProgramCache]: Analyzing trace with hash 309487203, now seen corresponding path program 1 times [2020-11-07 02:13:50,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:50,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101529979] [2020-11-07 02:13:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:52,917 WARN L194 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-07 02:13:55,109 WARN L194 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 02:13:59,316 WARN L194 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 533 DAG size of output: 195 [2020-11-07 02:13:59,321 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:59,323 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:59,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:59,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 02:13:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:13:59,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101529979] [2020-11-07 02:13:59,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:59,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:13:59,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165813888] [2020-11-07 02:13:59,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:13:59,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:59,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:13:59,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:13:59,536 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 5 states. [2020-11-07 02:13:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:59,935 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2020-11-07 02:13:59,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:13:59,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-11-07 02:13:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:59,937 INFO L225 Difference]: With dead ends: 99 [2020-11-07 02:13:59,937 INFO L226 Difference]: Without dead ends: 74 [2020-11-07 02:13:59,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:13:59,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-07 02:13:59,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2020-11-07 02:13:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-07 02:13:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-11-07 02:13:59,986 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 48 [2020-11-07 02:13:59,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:59,987 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-11-07 02:13:59,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:13:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-11-07 02:13:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-07 02:13:59,992 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:59,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:13:59,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:13:59,997 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:00,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1215752241, now seen corresponding path program 1 times [2020-11-07 02:14:00,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:00,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919429112] [2020-11-07 02:14:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:04,273 WARN L194 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 02:14:11,434 WARN L194 SmtUtils]: Spent 7.16 s on a formula simplification. DAG size of input: 464 DAG size of output: 204 [2020-11-07 02:14:11,438 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:14:11,439 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:11,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:11,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 02:14:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:14:11,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919429112] [2020-11-07 02:14:11,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:11,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:14:11,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158700482] [2020-11-07 02:14:11,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:14:11,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:11,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:14:11,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:14:11,574 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 5 states. [2020-11-07 02:14:11,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:11,879 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2020-11-07 02:14:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:14:11,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-11-07 02:14:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:11,882 INFO L225 Difference]: With dead ends: 98 [2020-11-07 02:14:11,882 INFO L226 Difference]: Without dead ends: 73 [2020-11-07 02:14:11,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:14:11,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-07 02:14:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2020-11-07 02:14:11,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-07 02:14:11,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-11-07 02:14:11,908 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 49 [2020-11-07 02:14:11,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:11,908 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-11-07 02:14:11,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:14:11,909 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-11-07 02:14:11,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-07 02:14:11,910 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:11,910 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:14:11,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 02:14:11,910 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:11,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:11,911 INFO L82 PathProgramCache]: Analyzing trace with hash 275252137, now seen corresponding path program 1 times [2020-11-07 02:14:11,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:11,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108491226] [2020-11-07 02:14:11,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:13,994 WARN L194 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-07 02:14:16,150 WARN L194 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 02:14:24,145 WARN L194 SmtUtils]: Spent 7.99 s on a formula simplification. DAG size of input: 468 DAG size of output: 228 [2020-11-07 02:14:24,149 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:14:24,150 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:24,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:24,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 02:14:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:14:24,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108491226] [2020-11-07 02:14:24,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:24,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 02:14:24,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348482330] [2020-11-07 02:14:24,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 02:14:24,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:24,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 02:14:24,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-07 02:14:24,525 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 9 states. [2020-11-07 02:14:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:29,482 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2020-11-07 02:14:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 02:14:29,482 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-11-07 02:14:29,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:29,484 INFO L225 Difference]: With dead ends: 97 [2020-11-07 02:14:29,484 INFO L226 Difference]: Without dead ends: 72 [2020-11-07 02:14:29,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-11-07 02:14:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-07 02:14:29,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2020-11-07 02:14:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-07 02:14:29,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-11-07 02:14:29,510 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 50 [2020-11-07 02:14:29,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:29,511 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-11-07 02:14:29,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 02:14:29,511 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-11-07 02:14:29,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-07 02:14:29,512 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:29,512 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:14:29,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 02:14:29,513 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:29,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:29,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1515582231, now seen corresponding path program 1 times [2020-11-07 02:14:29,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:29,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716829508] [2020-11-07 02:14:29,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:33,699 WARN L194 SmtUtils]: Spent 4.18 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-07 02:14:35,881 WARN L194 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 02:14:43,792 WARN L194 SmtUtils]: Spent 7.91 s on a formula simplification. DAG size of input: 533 DAG size of output: 232 [2020-11-07 02:14:43,796 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:14:43,797 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:44,347 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2020-11-07 02:14:44,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:44,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 02:14:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:14:44,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716829508] [2020-11-07 02:14:44,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:44,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 02:14:44,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020300987] [2020-11-07 02:14:44,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 02:14:44,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:44,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 02:14:44,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-11-07 02:14:44,470 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 18 states. [2020-11-07 02:14:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:46,100 INFO L93 Difference]: Finished difference Result 132 states and 163 transitions. [2020-11-07 02:14:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 02:14:46,101 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-11-07 02:14:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:46,105 INFO L225 Difference]: With dead ends: 132 [2020-11-07 02:14:46,105 INFO L226 Difference]: Without dead ends: 129 [2020-11-07 02:14:46,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=259, Invalid=863, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 02:14:46,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-11-07 02:14:46,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 76. [2020-11-07 02:14:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-07 02:14:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2020-11-07 02:14:46,155 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 51 [2020-11-07 02:14:46,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:46,155 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2020-11-07 02:14:46,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 02:14:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2020-11-07 02:14:46,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-07 02:14:46,157 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:46,157 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:14:46,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 02:14:46,157 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:46,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:46,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2080392521, now seen corresponding path program 1 times [2020-11-07 02:14:46,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:46,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496417035] [2020-11-07 02:14:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:46,307 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 02:14:52,253 WARN L194 SmtUtils]: Spent 5.94 s on a formula simplification. DAG size of input: 533 DAG size of output: 232 [2020-11-07 02:14:52,260 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:14:52,262 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:52,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:52,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 02:14:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:14:52,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496417035] [2020-11-07 02:14:52,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:52,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:14:52,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363370096] [2020-11-07 02:14:52,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:14:52,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:52,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:14:52,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:14:52,396 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 5 states. [2020-11-07 02:14:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:52,705 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-11-07 02:14:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:14:52,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-11-07 02:14:52,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:52,709 INFO L225 Difference]: With dead ends: 101 [2020-11-07 02:14:52,710 INFO L226 Difference]: Without dead ends: 76 [2020-11-07 02:14:52,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:14:52,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-07 02:14:52,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-11-07 02:14:52,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-07 02:14:52,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2020-11-07 02:14:52,739 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 51 [2020-11-07 02:14:52,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:52,740 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2020-11-07 02:14:52,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:14:52,740 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2020-11-07 02:14:52,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-07 02:14:52,741 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:52,741 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-11-07 02:14:52,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 02:14:52,741 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:52,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:52,742 INFO L82 PathProgramCache]: Analyzing trace with hash -695123077, now seen corresponding path program 2 times [2020-11-07 02:14:52,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:52,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593904144] [2020-11-07 02:14:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:57,022 WARN L194 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 02:15:03,001 WARN L194 SmtUtils]: Spent 5.98 s on a formula simplification. DAG size of input: 533 DAG size of output: 232 [2020-11-07 02:15:23,991 WARN L194 SmtUtils]: Spent 20.99 s on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-11-07 02:16:51,808 WARN L194 SmtUtils]: Spent 1.46 m on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-11-07 02:17:11,639 WARN L194 SmtUtils]: Spent 18.85 s on a formula simplification. DAG size of input: 590 DAG size of output: 340 [2020-11-07 02:17:11,644 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:17:11,645 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:17:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:11,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:17:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:11,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 02:17:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:11,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-07 02:17:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:17:11,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593904144] [2020-11-07 02:17:11,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:17:11,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:17:11,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293991128] [2020-11-07 02:17:11,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:17:11,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:17:11,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:17:11,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:17:11,830 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand 6 states. [2020-11-07 02:17:12,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:17:12,389 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2020-11-07 02:17:12,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 02:17:12,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-11-07 02:17:12,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:17:12,392 INFO L225 Difference]: With dead ends: 117 [2020-11-07 02:17:12,392 INFO L226 Difference]: Without dead ends: 92 [2020-11-07 02:17:12,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-07 02:17:12,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-07 02:17:12,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2020-11-07 02:17:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 02:17:12,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-11-07 02:17:12,426 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 60 [2020-11-07 02:17:12,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:17:12,427 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-11-07 02:17:12,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:17:12,427 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-11-07 02:17:12,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-07 02:17:12,428 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:17:12,428 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:17:12,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 02:17:12,428 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:17:12,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:17:12,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1342407559, now seen corresponding path program 1 times [2020-11-07 02:17:12,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:17:12,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944063814] [2020-11-07 02:17:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:17:12,612 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 02:17:23,983 WARN L194 SmtUtils]: Spent 11.37 s on a formula simplification. DAG size of input: 441 DAG size of output: 270 [2020-11-07 02:17:38,720 WARN L194 SmtUtils]: Spent 14.73 s on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-11-07 02:18:41,549 WARN L194 SmtUtils]: Spent 1.05 m on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-11-07 02:19:25,459 WARN L194 SmtUtils]: Spent 43.76 s on a formula simplification. DAG size of input: 2614 DAG size of output: 340 [2020-11-07 02:19:25,464 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:19:25,466 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:19:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:25,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:19:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:26,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 02:19:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:26,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-07 02:19:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:19:26,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944063814] [2020-11-07 02:19:26,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:19:26,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 02:19:26,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030992445] [2020-11-07 02:19:26,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 02:19:26,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:19:26,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 02:19:26,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-07 02:19:26,049 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 9 states. [2020-11-07 02:19:26,364 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-11-07 02:19:26,615 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-11-07 02:19:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:19:27,546 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-11-07 02:19:27,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 02:19:27,548 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-11-07 02:19:27,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:19:27,550 INFO L225 Difference]: With dead ends: 116 [2020-11-07 02:19:27,550 INFO L226 Difference]: Without dead ends: 91 [2020-11-07 02:19:27,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-11-07 02:19:27,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-07 02:19:27,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-11-07 02:19:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-07 02:19:27,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-11-07 02:19:27,578 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 61 [2020-11-07 02:19:27,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:19:27,578 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-11-07 02:19:27,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 02:19:27,579 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-11-07 02:19:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-07 02:19:27,580 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:19:27,580 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-11-07 02:19:27,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 02:19:27,580 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:19:27,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:19:27,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1111402625, now seen corresponding path program 1 times [2020-11-07 02:19:27,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:19:27,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227641834] [2020-11-07 02:19:27,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:19:29,824 WARN L194 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 02:19:40,942 WARN L194 SmtUtils]: Spent 11.11 s on a formula simplification. DAG size of input: 453 DAG size of output: 204 [2020-11-07 02:20:46,113 WARN L194 SmtUtils]: Spent 1.09 m on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-11-07 02:21:26,508 WARN L194 SmtUtils]: Spent 40.39 s on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-11-07 02:21:55,235 WARN L194 SmtUtils]: Spent 28.03 s on a formula simplification. DAG size of input: 590 DAG size of output: 340 [2020-11-07 02:21:55,241 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:21:55,243 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:21:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:21:56,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:21:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:21:56,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 02:21:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:21:56,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-07 02:21:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:21:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:21:56,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227641834] [2020-11-07 02:21:56,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:21:56,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 02:21:56,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136162307] [2020-11-07 02:21:56,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 02:21:56,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:21:56,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 02:21:56,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-07 02:21:56,280 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 10 states. [2020-11-07 02:21:56,580 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-11-07 02:21:56,815 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-11-07 02:21:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:21:57,856 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2020-11-07 02:21:57,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 02:21:57,859 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-11-07 02:21:57,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:21:57,861 INFO L225 Difference]: With dead ends: 115 [2020-11-07 02:21:57,861 INFO L226 Difference]: Without dead ends: 90 [2020-11-07 02:21:57,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-11-07 02:21:57,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-07 02:21:57,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-11-07 02:21:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-07 02:21:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2020-11-07 02:21:57,895 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 62 [2020-11-07 02:21:57,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:21:57,896 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2020-11-07 02:21:57,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 02:21:57,896 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2020-11-07 02:21:57,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-07 02:21:57,896 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:21:57,897 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-11-07 02:21:57,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 02:21:57,897 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:21:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:21:57,898 INFO L82 PathProgramCache]: Analyzing trace with hash -724728243, now seen corresponding path program 1 times [2020-11-07 02:21:57,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:21:57,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148355277] [2020-11-07 02:21:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:22:00,024 WARN L194 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-07 02:22:04,382 WARN L194 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 02:22:15,096 WARN L194 SmtUtils]: Spent 10.71 s on a formula simplification. DAG size of input: 533 DAG size of output: 232 [2020-11-07 02:22:50,187 WARN L194 SmtUtils]: Spent 35.09 s on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-11-07 02:24:18,977 WARN L194 SmtUtils]: Spent 1.48 m on a formula simplification. DAG size of input: 62 DAG size of output: 56