/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/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:57:26,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:57:26,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:57:26,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 01:57:26,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 01:57:26,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 01:57:26,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 01:57:26,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 01:57:26,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 01:57:26,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 01:57:26,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 01:57:26,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 01:57:26,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:57:26,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:57:26,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:57:26,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:57:26,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:57:26,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:57:26,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:57:26,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:57:26,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:57:26,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:57:26,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:57:26,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:57:26,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 01:57:26,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 01:57:26,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 01:57:26,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 01:57:26,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 01:57:26,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 01:57:26,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 01:57:26,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 01:57:26,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 01:57:26,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 01:57:26,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 01:57:26,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 01:57:26,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 01:57:26,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 01:57:26,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:57:26,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:57:26,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:57:26,807 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 01:57:26,818 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:57:26,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:57:26,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:57:26,821 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:57:26,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:57:26,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:57:26,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:57:26,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:57:26,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:57:26,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:57:26,823 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:57:26,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:57:26,823 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:57:26,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:57:26,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:57:26,824 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:57:26,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:57:26,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:57:26,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:57:26,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:57:26,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:57:26,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:57:26,826 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:57:27,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:57:27,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:57:27,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:57:27,286 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:57:27,287 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:57:27,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-11-07 01:57:27,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83b6e1b2c/9cdeb44afac44fd8af19cc1546b76e63/FLAG8c9cd184c [2020-11-07 01:57:28,096 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:57:28,097 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2020-11-07 01:57:28,107 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83b6e1b2c/9cdeb44afac44fd8af19cc1546b76e63/FLAG8c9cd184c [2020-11-07 01:57:28,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83b6e1b2c/9cdeb44afac44fd8af19cc1546b76e63 [2020-11-07 01:57:28,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:57:28,466 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:57:28,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:57:28,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:57:28,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:57:28,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:28" (1/1) ... [2020-11-07 01:57:28,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1647dd8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:28, skipping insertion in model container [2020-11-07 01:57:28,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:28" (1/1) ... [2020-11-07 01:57:28,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:57:28,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:57:28,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:57:28,762 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:57:28,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:57:28,839 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:57:28,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:28 WrapperNode [2020-11-07 01:57:28,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:57:28,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:57:28,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:57:28,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:57:28,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:28" (1/1) ... [2020-11-07 01:57:28,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:28" (1/1) ... [2020-11-07 01:57:28,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:28" (1/1) ... [2020-11-07 01:57:28,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:28" (1/1) ... [2020-11-07 01:57:28,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:28" (1/1) ... [2020-11-07 01:57:28,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:28" (1/1) ... [2020-11-07 01:57:28,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:28" (1/1) ... [2020-11-07 01:57:28,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:57:28,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:57:28,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:57:28,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:57:28,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:57:28,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:57:28,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:57:28,979 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:57:28,979 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 01:57:28,979 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 01:57:28,979 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:57:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:57:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:57:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 01:57:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 01:57:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:57:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:57:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 01:57:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 01:57:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-07 01:57:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:57:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:57:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:57:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:57:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:57:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:57:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:57:29,765 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:57:29,765 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-07 01:57:29,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:29 BoogieIcfgContainer [2020-11-07 01:57:29,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:57:29,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:57:29,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:57:29,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:57:29,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:57:28" (1/3) ... [2020-11-07 01:57:29,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96de914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:29, skipping insertion in model container [2020-11-07 01:57:29,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:28" (2/3) ... [2020-11-07 01:57:29,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96de914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:29, skipping insertion in model container [2020-11-07 01:57:29,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:29" (3/3) ... [2020-11-07 01:57:29,781 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-11-07 01:57:29,797 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:57:29,802 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:57:29,816 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:57:29,852 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:57:29,852 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:57:29,852 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:57:29,852 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:57:29,852 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:57:29,853 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:57:29,853 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:57:29,853 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:57:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-11-07 01:57:29,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 01:57:29,897 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:29,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:29,898 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:29,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1931188946, now seen corresponding path program 1 times [2020-11-07 01:57:29,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:29,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663227583] [2020-11-07 01:57:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:30,013 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:30,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:30,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663227583] [2020-11-07 01:57:30,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:30,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 01:57:30,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257680867] [2020-11-07 01:57:30,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 01:57:30,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:30,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 01:57:30,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:57:30,287 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 3 states. [2020-11-07 01:57:30,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:30,598 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2020-11-07 01:57:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 01:57:30,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-11-07 01:57:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:30,610 INFO L225 Difference]: With dead ends: 200 [2020-11-07 01:57:30,611 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 01:57:30,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:57:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 01:57:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-11-07 01:57:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 01:57:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-11-07 01:57:30,690 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 43 [2020-11-07 01:57:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:30,691 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-11-07 01:57:30,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 01:57:30,693 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-11-07 01:57:30,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 01:57:30,696 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:30,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:30,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:57:30,697 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:30,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:30,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1726206385, now seen corresponding path program 1 times [2020-11-07 01:57:30,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:30,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907576490] [2020-11-07 01:57:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:30,713 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:30,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:30,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907576490] [2020-11-07 01:57:30,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:30,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 01:57:30,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17161498] [2020-11-07 01:57:30,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 01:57:30,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:30,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 01:57:30,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 01:57:30,834 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 4 states. [2020-11-07 01:57:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:31,211 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2020-11-07 01:57:31,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 01:57:31,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-11-07 01:57:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:31,214 INFO L225 Difference]: With dead ends: 152 [2020-11-07 01:57:31,214 INFO L226 Difference]: Without dead ends: 95 [2020-11-07 01:57:31,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 01:57:31,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-07 01:57:31,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2020-11-07 01:57:31,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-07 01:57:31,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2020-11-07 01:57:31,232 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 47 [2020-11-07 01:57:31,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:31,233 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2020-11-07 01:57:31,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 01:57:31,233 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2020-11-07 01:57:31,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-07 01:57:31,235 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:31,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:31,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:57:31,236 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:31,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:31,237 INFO L82 PathProgramCache]: Analyzing trace with hash 531359868, now seen corresponding path program 1 times [2020-11-07 01:57:31,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:31,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761207370] [2020-11-07 01:57:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:31,320 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:31,322 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:31,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:31,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761207370] [2020-11-07 01:57:31,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:31,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 01:57:31,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994443585] [2020-11-07 01:57:31,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 01:57:31,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:31,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 01:57:31,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:57:31,471 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 6 states. [2020-11-07 01:57:31,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:31,712 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2020-11-07 01:57:31,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 01:57:31,712 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-11-07 01:57:31,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:31,714 INFO L225 Difference]: With dead ends: 160 [2020-11-07 01:57:31,714 INFO L226 Difference]: Without dead ends: 102 [2020-11-07 01:57:31,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-07 01:57:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-07 01:57:31,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2020-11-07 01:57:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-07 01:57:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2020-11-07 01:57:31,728 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 61 [2020-11-07 01:57:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:31,729 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2020-11-07 01:57:31,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 01:57:31,729 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2020-11-07 01:57:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-07 01:57:31,731 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:31,732 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:31,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 01:57:31,732 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:31,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:31,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2109050272, now seen corresponding path program 2 times [2020-11-07 01:57:31,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:31,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277973280] [2020-11-07 01:57:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:31,799 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:31,801 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:31,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:31,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277973280] [2020-11-07 01:57:31,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:31,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 01:57:31,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197224605] [2020-11-07 01:57:31,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 01:57:31,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:31,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 01:57:31,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:57:31,928 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand 6 states. [2020-11-07 01:57:32,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:32,220 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2020-11-07 01:57:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 01:57:32,220 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-11-07 01:57:32,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:32,222 INFO L225 Difference]: With dead ends: 150 [2020-11-07 01:57:32,222 INFO L226 Difference]: Without dead ends: 104 [2020-11-07 01:57:32,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-07 01:57:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-07 01:57:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2020-11-07 01:57:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-07 01:57:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2020-11-07 01:57:32,242 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 68 [2020-11-07 01:57:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:32,243 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2020-11-07 01:57:32,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 01:57:32,243 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2020-11-07 01:57:32,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-07 01:57:32,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:32,253 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:32,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 01:57:32,255 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:32,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:32,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1042508207, now seen corresponding path program 3 times [2020-11-07 01:57:32,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:32,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589925387] [2020-11-07 01:57:32,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:32,326 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:32,329 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:32,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:32,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589925387] [2020-11-07 01:57:32,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:32,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 01:57:32,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82855649] [2020-11-07 01:57:32,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 01:57:32,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:32,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 01:57:32,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 01:57:32,476 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand 8 states. [2020-11-07 01:57:32,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:32,726 INFO L93 Difference]: Finished difference Result 176 states and 186 transitions. [2020-11-07 01:57:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 01:57:32,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-11-07 01:57:32,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:32,728 INFO L225 Difference]: With dead ends: 176 [2020-11-07 01:57:32,728 INFO L226 Difference]: Without dead ends: 111 [2020-11-07 01:57:32,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:57:32,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-07 01:57:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2020-11-07 01:57:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-07 01:57:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2020-11-07 01:57:32,741 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 75 [2020-11-07 01:57:32,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:32,742 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2020-11-07 01:57:32,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 01:57:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2020-11-07 01:57:32,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-07 01:57:32,743 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:32,743 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:32,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 01:57:32,744 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:32,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:32,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1786539125, now seen corresponding path program 4 times [2020-11-07 01:57:32,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:32,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093486078] [2020-11-07 01:57:32,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:32,806 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:32,807 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:32,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:32,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093486078] [2020-11-07 01:57:32,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:32,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 01:57:32,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947947814] [2020-11-07 01:57:32,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 01:57:32,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:32,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 01:57:32,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-07 01:57:32,953 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 10 states. [2020-11-07 01:57:33,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:33,233 INFO L93 Difference]: Finished difference Result 183 states and 193 transitions. [2020-11-07 01:57:33,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 01:57:33,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-11-07 01:57:33,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:33,235 INFO L225 Difference]: With dead ends: 183 [2020-11-07 01:57:33,235 INFO L226 Difference]: Without dead ends: 118 [2020-11-07 01:57:33,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-11-07 01:57:33,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-07 01:57:33,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-11-07 01:57:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-07 01:57:33,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2020-11-07 01:57:33,248 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 82 [2020-11-07 01:57:33,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:33,248 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2020-11-07 01:57:33,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 01:57:33,248 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2020-11-07 01:57:33,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-07 01:57:33,249 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:33,250 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:33,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 01:57:33,250 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:33,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:33,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2016028113, now seen corresponding path program 5 times [2020-11-07 01:57:33,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:33,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689954968] [2020-11-07 01:57:33,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:33,307 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:33,309 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:33,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:33,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689954968] [2020-11-07 01:57:33,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:33,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 01:57:33,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3759388] [2020-11-07 01:57:33,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 01:57:33,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:33,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 01:57:33,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:57:33,531 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand 12 states. [2020-11-07 01:57:33,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:33,938 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2020-11-07 01:57:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 01:57:33,938 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 89 [2020-11-07 01:57:33,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:33,940 INFO L225 Difference]: With dead ends: 185 [2020-11-07 01:57:33,940 INFO L226 Difference]: Without dead ends: 120 [2020-11-07 01:57:33,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-11-07 01:57:33,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-07 01:57:33,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-11-07 01:57:33,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-07 01:57:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-11-07 01:57:33,955 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 89 [2020-11-07 01:57:33,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:33,955 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-11-07 01:57:33,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 01:57:33,956 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-11-07 01:57:33,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-07 01:57:33,956 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:33,957 INFO L422 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:33,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 01:57:33,957 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:33,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:33,958 INFO L82 PathProgramCache]: Analyzing trace with hash 741764341, now seen corresponding path program 6 times [2020-11-07 01:57:33,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:33,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534001165] [2020-11-07 01:57:33,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:34,021 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:34,023 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:34,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:34,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534001165] [2020-11-07 01:57:34,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:34,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 01:57:34,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853882436] [2020-11-07 01:57:34,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 01:57:34,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:34,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 01:57:34,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 01:57:34,131 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 8 states. [2020-11-07 01:57:34,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:34,409 INFO L93 Difference]: Finished difference Result 178 states and 187 transitions. [2020-11-07 01:57:34,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 01:57:34,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-11-07 01:57:34,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:34,411 INFO L225 Difference]: With dead ends: 178 [2020-11-07 01:57:34,411 INFO L226 Difference]: Without dead ends: 132 [2020-11-07 01:57:34,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:57:34,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-11-07 01:57:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2020-11-07 01:57:34,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-07 01:57:34,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2020-11-07 01:57:34,423 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 96 [2020-11-07 01:57:34,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:34,423 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2020-11-07 01:57:34,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 01:57:34,424 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2020-11-07 01:57:34,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-07 01:57:34,425 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:34,425 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:34,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 01:57:34,425 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:34,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1731640668, now seen corresponding path program 7 times [2020-11-07 01:57:34,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:34,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128337130] [2020-11-07 01:57:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:34,488 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:34,490 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:34,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:34,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128337130] [2020-11-07 01:57:34,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:34,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 01:57:34,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473950724] [2020-11-07 01:57:34,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 01:57:34,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:34,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 01:57:34,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-07 01:57:34,667 INFO L87 Difference]: Start difference. First operand 127 states and 132 transitions. Second operand 10 states. [2020-11-07 01:57:35,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:35,041 INFO L93 Difference]: Finished difference Result 185 states and 194 transitions. [2020-11-07 01:57:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 01:57:35,042 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 103 [2020-11-07 01:57:35,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:35,043 INFO L225 Difference]: With dead ends: 185 [2020-11-07 01:57:35,043 INFO L226 Difference]: Without dead ends: 139 [2020-11-07 01:57:35,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-11-07 01:57:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-07 01:57:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2020-11-07 01:57:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-11-07 01:57:35,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 139 transitions. [2020-11-07 01:57:35,054 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 139 transitions. Word has length 103 [2020-11-07 01:57:35,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:35,054 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 139 transitions. [2020-11-07 01:57:35,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 01:57:35,055 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 139 transitions. [2020-11-07 01:57:35,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-11-07 01:57:35,056 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:35,056 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:35,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 01:57:35,056 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:35,057 INFO L82 PathProgramCache]: Analyzing trace with hash -170558699, now seen corresponding path program 8 times [2020-11-07 01:57:35,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:35,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471754064] [2020-11-07 01:57:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:35,117 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:35,119 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:35,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:35,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471754064] [2020-11-07 01:57:35,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:35,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 01:57:35,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273708869] [2020-11-07 01:57:35,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 01:57:35,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:35,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 01:57:35,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:57:35,285 INFO L87 Difference]: Start difference. First operand 134 states and 139 transitions. Second operand 12 states. [2020-11-07 01:57:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:35,712 INFO L93 Difference]: Finished difference Result 187 states and 196 transitions. [2020-11-07 01:57:35,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 01:57:35,712 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 110 [2020-11-07 01:57:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:35,714 INFO L225 Difference]: With dead ends: 187 [2020-11-07 01:57:35,714 INFO L226 Difference]: Without dead ends: 141 [2020-11-07 01:57:35,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-11-07 01:57:35,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-07 01:57:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-11-07 01:57:35,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-11-07 01:57:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2020-11-07 01:57:35,726 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 110 [2020-11-07 01:57:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:35,727 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2020-11-07 01:57:35,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 01:57:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2020-11-07 01:57:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-11-07 01:57:35,728 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:35,729 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:35,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 01:57:35,729 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:35,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:35,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1454273732, now seen corresponding path program 9 times [2020-11-07 01:57:35,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:35,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022423089] [2020-11-07 01:57:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:35,795 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:35,796 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:35,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:35,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022423089] [2020-11-07 01:57:35,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:35,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 01:57:35,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606041547] [2020-11-07 01:57:35,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 01:57:35,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:35,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 01:57:35,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 01:57:35,932 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand 8 states. [2020-11-07 01:57:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:36,224 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2020-11-07 01:57:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 01:57:36,224 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 117 [2020-11-07 01:57:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:36,226 INFO L225 Difference]: With dead ends: 179 [2020-11-07 01:57:36,226 INFO L226 Difference]: Without dead ends: 146 [2020-11-07 01:57:36,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-07 01:57:36,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-07 01:57:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-11-07 01:57:36,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-11-07 01:57:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 148 transitions. [2020-11-07 01:57:36,237 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 148 transitions. Word has length 117 [2020-11-07 01:57:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:36,238 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 148 transitions. [2020-11-07 01:57:36,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 01:57:36,238 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 148 transitions. [2020-11-07 01:57:36,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-11-07 01:57:36,239 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:36,239 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:36,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 01:57:36,240 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:36,240 INFO L82 PathProgramCache]: Analyzing trace with hash -799740924, now seen corresponding path program 1 times [2020-11-07 01:57:36,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:36,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585726112] [2020-11-07 01:57:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:36,303 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:36,304 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:36,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:36,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585726112] [2020-11-07 01:57:36,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:36,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 01:57:36,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430301846] [2020-11-07 01:57:36,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 01:57:36,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:36,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 01:57:36,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-07 01:57:36,484 INFO L87 Difference]: Start difference. First operand 143 states and 148 transitions. Second operand 10 states. [2020-11-07 01:57:36,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:36,952 INFO L93 Difference]: Finished difference Result 183 states and 191 transitions. [2020-11-07 01:57:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 01:57:36,953 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 123 [2020-11-07 01:57:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:36,961 INFO L225 Difference]: With dead ends: 183 [2020-11-07 01:57:36,961 INFO L226 Difference]: Without dead ends: 175 [2020-11-07 01:57:36,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-11-07 01:57:36,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-11-07 01:57:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2020-11-07 01:57:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-11-07 01:57:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 178 transitions. [2020-11-07 01:57:36,979 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 178 transitions. Word has length 123 [2020-11-07 01:57:36,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:36,979 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 178 transitions. [2020-11-07 01:57:36,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 01:57:36,980 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 178 transitions. [2020-11-07 01:57:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-11-07 01:57:36,981 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:36,981 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:36,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 01:57:36,982 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:36,983 INFO L82 PathProgramCache]: Analyzing trace with hash 321820364, now seen corresponding path program 2 times [2020-11-07 01:57:36,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:36,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073128975] [2020-11-07 01:57:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:37,051 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:37,052 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:37,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:37,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073128975] [2020-11-07 01:57:37,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:37,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 01:57:37,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754005652] [2020-11-07 01:57:37,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 01:57:37,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:37,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 01:57:37,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:57:37,292 INFO L87 Difference]: Start difference. First operand 170 states and 178 transitions. Second operand 12 states. [2020-11-07 01:57:37,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:37,871 INFO L93 Difference]: Finished difference Result 184 states and 192 transitions. [2020-11-07 01:57:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 01:57:37,871 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 129 [2020-11-07 01:57:37,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:37,873 INFO L225 Difference]: With dead ends: 184 [2020-11-07 01:57:37,873 INFO L226 Difference]: Without dead ends: 176 [2020-11-07 01:57:37,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-11-07 01:57:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-11-07 01:57:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 144. [2020-11-07 01:57:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-07 01:57:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-11-07 01:57:37,889 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 129 [2020-11-07 01:57:37,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:37,890 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-11-07 01:57:37,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 01:57:37,890 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-11-07 01:57:37,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 01:57:37,892 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:37,892 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:37,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 01:57:37,893 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:37,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:37,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1541151436, now seen corresponding path program 1 times [2020-11-07 01:57:37,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:37,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312333543] [2020-11-07 01:57:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:37,960 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:37,962 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:38,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:38,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312333543] [2020-11-07 01:57:38,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:38,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 01:57:38,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845516639] [2020-11-07 01:57:38,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 01:57:38,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:38,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 01:57:38,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:57:38,133 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 6 states. [2020-11-07 01:57:38,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:38,398 INFO L93 Difference]: Finished difference Result 189 states and 197 transitions. [2020-11-07 01:57:38,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 01:57:38,399 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2020-11-07 01:57:38,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:38,401 INFO L225 Difference]: With dead ends: 189 [2020-11-07 01:57:38,401 INFO L226 Difference]: Without dead ends: 149 [2020-11-07 01:57:38,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-07 01:57:38,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-07 01:57:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2020-11-07 01:57:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-11-07 01:57:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 151 transitions. [2020-11-07 01:57:38,421 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 151 transitions. Word has length 135 [2020-11-07 01:57:38,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:38,422 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 151 transitions. [2020-11-07 01:57:38,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 01:57:38,422 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 151 transitions. [2020-11-07 01:57:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-07 01:57:38,425 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:38,425 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:38,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 01:57:38,426 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:38,427 INFO L82 PathProgramCache]: Analyzing trace with hash -307444684, now seen corresponding path program 1 times [2020-11-07 01:57:38,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:38,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338328193] [2020-11-07 01:57:38,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:38,500 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:38,501 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:38,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:38,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338328193] [2020-11-07 01:57:38,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:38,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 01:57:38,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092478552] [2020-11-07 01:57:38,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 01:57:38,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:38,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 01:57:38,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:57:38,727 INFO L87 Difference]: Start difference. First operand 146 states and 151 transitions. Second operand 12 states. [2020-11-07 01:57:39,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:39,161 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2020-11-07 01:57:39,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 01:57:39,161 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 141 [2020-11-07 01:57:39,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:39,163 INFO L225 Difference]: With dead ends: 205 [2020-11-07 01:57:39,163 INFO L226 Difference]: Without dead ends: 155 [2020-11-07 01:57:39,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-11-07 01:57:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-07 01:57:39,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-11-07 01:57:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-07 01:57:39,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 157 transitions. [2020-11-07 01:57:39,182 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 157 transitions. Word has length 141 [2020-11-07 01:57:39,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:39,183 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 157 transitions. [2020-11-07 01:57:39,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 01:57:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 157 transitions. [2020-11-07 01:57:39,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-11-07 01:57:39,184 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:39,185 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:39,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 01:57:39,185 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:39,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:39,186 INFO L82 PathProgramCache]: Analyzing trace with hash -363211524, now seen corresponding path program 2 times [2020-11-07 01:57:39,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:39,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085455265] [2020-11-07 01:57:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:39,261 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:39,263 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:39,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:39,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085455265] [2020-11-07 01:57:39,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:39,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 01:57:39,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741572499] [2020-11-07 01:57:39,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 01:57:39,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:39,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 01:57:39,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-07 01:57:39,554 INFO L87 Difference]: Start difference. First operand 152 states and 157 transitions. Second operand 14 states. [2020-11-07 01:57:40,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:40,135 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2020-11-07 01:57:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 01:57:40,136 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 147 [2020-11-07 01:57:40,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:40,137 INFO L225 Difference]: With dead ends: 179 [2020-11-07 01:57:40,137 INFO L226 Difference]: Without dead ends: 171 [2020-11-07 01:57:40,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2020-11-07 01:57:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-11-07 01:57:40,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 164. [2020-11-07 01:57:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-11-07 01:57:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 170 transitions. [2020-11-07 01:57:40,154 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 170 transitions. Word has length 147 [2020-11-07 01:57:40,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:40,155 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 170 transitions. [2020-11-07 01:57:40,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 01:57:40,155 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 170 transitions. [2020-11-07 01:57:40,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-11-07 01:57:40,157 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:40,157 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:40,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 01:57:40,157 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:40,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:40,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1555255236, now seen corresponding path program 3 times [2020-11-07 01:57:40,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:40,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366329215] [2020-11-07 01:57:40,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:40,222 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:40,225 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:40,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:40,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366329215] [2020-11-07 01:57:40,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:40,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 01:57:40,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891623526] [2020-11-07 01:57:40,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 01:57:40,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:40,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 01:57:40,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-07 01:57:40,406 INFO L87 Difference]: Start difference. First operand 164 states and 170 transitions. Second operand 10 states. [2020-11-07 01:57:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:40,732 INFO L93 Difference]: Finished difference Result 248 states and 259 transitions. [2020-11-07 01:57:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 01:57:40,732 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 159 [2020-11-07 01:57:40,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:40,734 INFO L225 Difference]: With dead ends: 248 [2020-11-07 01:57:40,734 INFO L226 Difference]: Without dead ends: 173 [2020-11-07 01:57:40,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-07 01:57:40,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-07 01:57:40,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2020-11-07 01:57:40,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-11-07 01:57:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 176 transitions. [2020-11-07 01:57:40,750 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 176 transitions. Word has length 159 [2020-11-07 01:57:40,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:40,751 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 176 transitions. [2020-11-07 01:57:40,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 01:57:40,752 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 176 transitions. [2020-11-07 01:57:40,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 01:57:40,753 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:40,754 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:40,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 01:57:40,754 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:40,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:40,755 INFO L82 PathProgramCache]: Analyzing trace with hash 351813932, now seen corresponding path program 4 times [2020-11-07 01:57:40,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:40,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517740028] [2020-11-07 01:57:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:40,815 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:40,817 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:41,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:41,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517740028] [2020-11-07 01:57:41,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:41,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 01:57:41,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201299747] [2020-11-07 01:57:41,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 01:57:41,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:41,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 01:57:41,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-11-07 01:57:41,109 INFO L87 Difference]: Start difference. First operand 170 states and 176 transitions. Second operand 16 states. [2020-11-07 01:57:41,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:41,750 INFO L93 Difference]: Finished difference Result 257 states and 269 transitions. [2020-11-07 01:57:41,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 01:57:41,750 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 165 [2020-11-07 01:57:41,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:41,752 INFO L225 Difference]: With dead ends: 257 [2020-11-07 01:57:41,752 INFO L226 Difference]: Without dead ends: 179 [2020-11-07 01:57:41,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-11-07 01:57:41,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-07 01:57:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2020-11-07 01:57:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-11-07 01:57:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 182 transitions. [2020-11-07 01:57:41,767 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 182 transitions. Word has length 165 [2020-11-07 01:57:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:41,767 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 182 transitions. [2020-11-07 01:57:41,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 01:57:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 182 transitions. [2020-11-07 01:57:41,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-11-07 01:57:41,769 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:41,770 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:41,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 01:57:41,770 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:41,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1810694644, now seen corresponding path program 5 times [2020-11-07 01:57:41,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:41,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436950293] [2020-11-07 01:57:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:41,834 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:41,836 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:42,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:42,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436950293] [2020-11-07 01:57:42,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:42,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 01:57:42,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523850941] [2020-11-07 01:57:42,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 01:57:42,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:42,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 01:57:42,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-11-07 01:57:42,176 INFO L87 Difference]: Start difference. First operand 176 states and 182 transitions. Second operand 18 states. [2020-11-07 01:57:43,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:43,019 INFO L93 Difference]: Finished difference Result 207 states and 214 transitions. [2020-11-07 01:57:43,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 01:57:43,020 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 171 [2020-11-07 01:57:43,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:43,022 INFO L225 Difference]: With dead ends: 207 [2020-11-07 01:57:43,023 INFO L226 Difference]: Without dead ends: 199 [2020-11-07 01:57:43,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 01:57:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-07 01:57:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 188. [2020-11-07 01:57:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-11-07 01:57:43,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 195 transitions. [2020-11-07 01:57:43,041 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 195 transitions. Word has length 171 [2020-11-07 01:57:43,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:43,042 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 195 transitions. [2020-11-07 01:57:43,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 01:57:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 195 transitions. [2020-11-07 01:57:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-11-07 01:57:43,044 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:43,044 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2020-11-07 01:57:43,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 01:57:43,045 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:43,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1378694980, now seen corresponding path program 6 times [2020-11-07 01:57:43,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:43,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155622431] [2020-11-07 01:57:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:43,111 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:43,112 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:43,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:43,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155622431] [2020-11-07 01:57:43,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:43,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 01:57:43,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949380208] [2020-11-07 01:57:43,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 01:57:43,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:43,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 01:57:43,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-11-07 01:57:43,364 INFO L87 Difference]: Start difference. First operand 188 states and 195 transitions. Second operand 14 states. [2020-11-07 01:57:44,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:44,035 INFO L93 Difference]: Finished difference Result 369 states and 388 transitions. [2020-11-07 01:57:44,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 01:57:44,036 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 183 [2020-11-07 01:57:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:44,038 INFO L225 Difference]: With dead ends: 369 [2020-11-07 01:57:44,038 INFO L226 Difference]: Without dead ends: 289 [2020-11-07 01:57:44,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-11-07 01:57:44,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-11-07 01:57:44,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 236. [2020-11-07 01:57:44,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-11-07 01:57:44,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 245 transitions. [2020-11-07 01:57:44,065 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 245 transitions. Word has length 183 [2020-11-07 01:57:44,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:44,066 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 245 transitions. [2020-11-07 01:57:44,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 01:57:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 245 transitions. [2020-11-07 01:57:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-11-07 01:57:44,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:44,068 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:44,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 01:57:44,069 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:44,069 INFO L82 PathProgramCache]: Analyzing trace with hash 104071716, now seen corresponding path program 7 times [2020-11-07 01:57:44,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:44,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090938345] [2020-11-07 01:57:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:44,127 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:44,129 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:44,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:44,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090938345] [2020-11-07 01:57:44,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:44,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 01:57:44,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382049342] [2020-11-07 01:57:44,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 01:57:44,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:44,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 01:57:44,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-11-07 01:57:44,484 INFO L87 Difference]: Start difference. First operand 236 states and 245 transitions. Second operand 20 states. [2020-11-07 01:57:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:45,426 INFO L93 Difference]: Finished difference Result 380 states and 398 transitions. [2020-11-07 01:57:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-07 01:57:45,429 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 189 [2020-11-07 01:57:45,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:45,431 INFO L225 Difference]: With dead ends: 380 [2020-11-07 01:57:45,431 INFO L226 Difference]: Without dead ends: 254 [2020-11-07 01:57:45,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 01:57:45,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-11-07 01:57:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2020-11-07 01:57:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-11-07 01:57:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 257 transitions. [2020-11-07 01:57:45,455 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 257 transitions. Word has length 189 [2020-11-07 01:57:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:45,456 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 257 transitions. [2020-11-07 01:57:45,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 01:57:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 257 transitions. [2020-11-07 01:57:45,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-11-07 01:57:45,458 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:45,459 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:45,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 01:57:45,459 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:45,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:45,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1299287316, now seen corresponding path program 8 times [2020-11-07 01:57:45,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:45,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745676759] [2020-11-07 01:57:45,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:45,529 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:45,530 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:45,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:45,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745676759] [2020-11-07 01:57:45,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:45,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 01:57:45,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44669586] [2020-11-07 01:57:45,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 01:57:45,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:45,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 01:57:45,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-11-07 01:57:45,935 INFO L87 Difference]: Start difference. First operand 248 states and 257 transitions. Second operand 22 states. [2020-11-07 01:57:47,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:47,049 INFO L93 Difference]: Finished difference Result 286 states and 296 transitions. [2020-11-07 01:57:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 01:57:47,053 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-11-07 01:57:47,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:47,055 INFO L225 Difference]: With dead ends: 286 [2020-11-07 01:57:47,055 INFO L226 Difference]: Without dead ends: 278 [2020-11-07 01:57:47,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 01:57:47,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-11-07 01:57:47,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 260. [2020-11-07 01:57:47,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-11-07 01:57:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 270 transitions. [2020-11-07 01:57:47,079 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 270 transitions. Word has length 195 [2020-11-07 01:57:47,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:47,079 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 270 transitions. [2020-11-07 01:57:47,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 01:57:47,080 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 270 transitions. [2020-11-07 01:57:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-11-07 01:57:47,082 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:47,082 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:47,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 01:57:47,083 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1824163252, now seen corresponding path program 9 times [2020-11-07 01:57:47,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:47,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863143301] [2020-11-07 01:57:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:47,150 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:47,152 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:47,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:47,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863143301] [2020-11-07 01:57:47,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:47,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 01:57:47,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996539471] [2020-11-07 01:57:47,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 01:57:47,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:47,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 01:57:47,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-11-07 01:57:47,459 INFO L87 Difference]: Start difference. First operand 260 states and 270 transitions. Second operand 18 states. [2020-11-07 01:57:48,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:48,629 INFO L93 Difference]: Finished difference Result 577 states and 609 transitions. [2020-11-07 01:57:48,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-07 01:57:48,630 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 207 [2020-11-07 01:57:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:48,633 INFO L225 Difference]: With dead ends: 577 [2020-11-07 01:57:48,633 INFO L226 Difference]: Without dead ends: 476 [2020-11-07 01:57:48,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=346, Invalid=1816, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 01:57:48,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-11-07 01:57:48,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 318. [2020-11-07 01:57:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-07 01:57:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 332 transitions. [2020-11-07 01:57:48,665 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 332 transitions. Word has length 207 [2020-11-07 01:57:48,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:48,665 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 332 transitions. [2020-11-07 01:57:48,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 01:57:48,665 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 332 transitions. [2020-11-07 01:57:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-11-07 01:57:48,667 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:48,667 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:48,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 01:57:48,668 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:48,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:48,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1725957916, now seen corresponding path program 10 times [2020-11-07 01:57:48,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:48,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737719403] [2020-11-07 01:57:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:48,730 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:48,731 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:49,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:49,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737719403] [2020-11-07 01:57:49,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:49,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 01:57:49,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601875096] [2020-11-07 01:57:49,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 01:57:49,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:49,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 01:57:49,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-11-07 01:57:49,171 INFO L87 Difference]: Start difference. First operand 318 states and 332 transitions. Second operand 24 states. [2020-11-07 01:57:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:50,427 INFO L93 Difference]: Finished difference Result 535 states and 563 transitions. [2020-11-07 01:57:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-07 01:57:50,428 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 213 [2020-11-07 01:57:50,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:50,432 INFO L225 Difference]: With dead ends: 535 [2020-11-07 01:57:50,432 INFO L226 Difference]: Without dead ends: 345 [2020-11-07 01:57:50,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=1866, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 01:57:50,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-11-07 01:57:50,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 336. [2020-11-07 01:57:50,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-11-07 01:57:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 350 transitions. [2020-11-07 01:57:50,473 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 350 transitions. Word has length 213 [2020-11-07 01:57:50,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:50,474 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 350 transitions. [2020-11-07 01:57:50,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 01:57:50,474 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 350 transitions. [2020-11-07 01:57:50,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-11-07 01:57:50,476 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:50,476 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:50,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 01:57:50,476 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:50,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:50,477 INFO L82 PathProgramCache]: Analyzing trace with hash 977151972, now seen corresponding path program 11 times [2020-11-07 01:57:50,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:50,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929536652] [2020-11-07 01:57:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:50,546 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:50,548 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:51,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:51,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929536652] [2020-11-07 01:57:51,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:51,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-11-07 01:57:51,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310279019] [2020-11-07 01:57:51,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 01:57:51,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:51,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 01:57:51,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-11-07 01:57:51,057 INFO L87 Difference]: Start difference. First operand 336 states and 350 transitions. Second operand 26 states. [2020-11-07 01:57:52,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:52,447 INFO L93 Difference]: Finished difference Result 393 states and 408 transitions. [2020-11-07 01:57:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 01:57:52,448 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 219 [2020-11-07 01:57:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:52,452 INFO L225 Difference]: With dead ends: 393 [2020-11-07 01:57:52,452 INFO L226 Difference]: Without dead ends: 385 [2020-11-07 01:57:52,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=567, Invalid=2625, Unknown=0, NotChecked=0, Total=3192 [2020-11-07 01:57:52,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-11-07 01:57:52,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 348. [2020-11-07 01:57:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-11-07 01:57:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 363 transitions. [2020-11-07 01:57:52,489 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 363 transitions. Word has length 219 [2020-11-07 01:57:52,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:52,489 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 363 transitions. [2020-11-07 01:57:52,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 01:57:52,489 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 363 transitions. [2020-11-07 01:57:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-11-07 01:57:52,491 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:52,491 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:52,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 01:57:52,492 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:52,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:52,492 INFO L82 PathProgramCache]: Analyzing trace with hash 359302828, now seen corresponding path program 12 times [2020-11-07 01:57:52,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:52,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26134536] [2020-11-07 01:57:52,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:52,576 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:52,578 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:52,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:52,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26134536] [2020-11-07 01:57:52,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:52,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 01:57:52,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134332385] [2020-11-07 01:57:52,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 01:57:52,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:52,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 01:57:52,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2020-11-07 01:57:52,975 INFO L87 Difference]: Start difference. First operand 348 states and 363 transitions. Second operand 22 states. [2020-11-07 01:57:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:54,982 INFO L93 Difference]: Finished difference Result 863 states and 913 transitions. [2020-11-07 01:57:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-07 01:57:54,983 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2020-11-07 01:57:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:54,987 INFO L225 Difference]: With dead ends: 863 [2020-11-07 01:57:54,987 INFO L226 Difference]: Without dead ends: 741 [2020-11-07 01:57:54,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=768, Invalid=4202, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 01:57:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-11-07 01:57:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 412. [2020-11-07 01:57:55,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-11-07 01:57:55,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 431 transitions. [2020-11-07 01:57:55,042 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 431 transitions. Word has length 231 [2020-11-07 01:57:55,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:55,043 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 431 transitions. [2020-11-07 01:57:55,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 01:57:55,043 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 431 transitions. [2020-11-07 01:57:55,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-11-07 01:57:55,045 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:55,045 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:55,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 01:57:55,046 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:55,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:55,046 INFO L82 PathProgramCache]: Analyzing trace with hash 989614100, now seen corresponding path program 13 times [2020-11-07 01:57:55,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:55,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573120704] [2020-11-07 01:57:55,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:55,118 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:55,119 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:58,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:58,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573120704] [2020-11-07 01:57:58,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:58,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-11-07 01:57:58,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493010900] [2020-11-07 01:57:58,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-07 01:57:58,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:58,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-07 01:57:58,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1886, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 01:57:58,561 INFO L87 Difference]: Start difference. First operand 412 states and 431 transitions. Second operand 46 states. [2020-11-07 01:58:07,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:07,593 INFO L93 Difference]: Finished difference Result 849 states and 901 transitions. [2020-11-07 01:58:07,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-07 01:58:07,594 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 237 [2020-11-07 01:58:07,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:07,600 INFO L225 Difference]: With dead ends: 849 [2020-11-07 01:58:07,600 INFO L226 Difference]: Without dead ends: 776 [2020-11-07 01:58:07,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=753, Invalid=10803, Unknown=0, NotChecked=0, Total=11556 [2020-11-07 01:58:07,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2020-11-07 01:58:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 428. [2020-11-07 01:58:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-11-07 01:58:07,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 449 transitions. [2020-11-07 01:58:07,679 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 449 transitions. Word has length 237 [2020-11-07 01:58:07,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:07,680 INFO L481 AbstractCegarLoop]: Abstraction has 428 states and 449 transitions. [2020-11-07 01:58:07,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-07 01:58:07,680 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 449 transitions. [2020-11-07 01:58:07,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-11-07 01:58:07,682 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:07,682 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:07,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 01:58:07,683 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:07,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:07,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1517921228, now seen corresponding path program 1 times [2020-11-07 01:58:07,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:07,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661211874] [2020-11-07 01:58:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:07,752 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:07,754 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:08,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:08,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661211874] [2020-11-07 01:58:08,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:08,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-11-07 01:58:08,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699495056] [2020-11-07 01:58:08,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 01:58:08,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:08,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 01:58:08,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-11-07 01:58:08,239 INFO L87 Difference]: Start difference. First operand 428 states and 449 transitions. Second operand 23 states. [2020-11-07 01:58:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:09,185 INFO L93 Difference]: Finished difference Result 539 states and 566 transitions. [2020-11-07 01:58:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 01:58:09,186 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 239 [2020-11-07 01:58:09,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:09,188 INFO L225 Difference]: With dead ends: 539 [2020-11-07 01:58:09,189 INFO L226 Difference]: Without dead ends: 390 [2020-11-07 01:58:09,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 01:58:09,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-11-07 01:58:09,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2020-11-07 01:58:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-11-07 01:58:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 409 transitions. [2020-11-07 01:58:09,255 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 409 transitions. Word has length 239 [2020-11-07 01:58:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:09,255 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 409 transitions. [2020-11-07 01:58:09,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 01:58:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 409 transitions. [2020-11-07 01:58:09,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-11-07 01:58:09,257 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:09,258 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:09,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 01:58:09,258 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:09,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:09,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1593033316, now seen corresponding path program 2 times [2020-11-07 01:58:09,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:09,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683589171] [2020-11-07 01:58:09,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:09,321 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:09,322 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:09,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:09,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683589171] [2020-11-07 01:58:09,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:09,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-11-07 01:58:09,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993368973] [2020-11-07 01:58:09,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 01:58:09,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:09,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 01:58:09,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-11-07 01:58:09,802 INFO L87 Difference]: Start difference. First operand 390 states and 409 transitions. Second operand 25 states. [2020-11-07 01:58:11,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:11,510 INFO L93 Difference]: Finished difference Result 639 states and 674 transitions. [2020-11-07 01:58:11,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-07 01:58:11,511 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 245 [2020-11-07 01:58:11,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:11,514 INFO L225 Difference]: With dead ends: 639 [2020-11-07 01:58:11,514 INFO L226 Difference]: Without dead ends: 492 [2020-11-07 01:58:11,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=447, Invalid=2633, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 01:58:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-11-07 01:58:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 402. [2020-11-07 01:58:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-11-07 01:58:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 421 transitions. [2020-11-07 01:58:11,584 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 421 transitions. Word has length 245 [2020-11-07 01:58:11,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:11,585 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 421 transitions. [2020-11-07 01:58:11,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 01:58:11,585 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 421 transitions. [2020-11-07 01:58:11,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-11-07 01:58:11,587 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:11,587 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:11,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 01:58:11,587 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:11,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:11,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1763846052, now seen corresponding path program 3 times [2020-11-07 01:58:11,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:11,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14612820] [2020-11-07 01:58:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:11,659 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:11,661 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:12,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:12,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14612820] [2020-11-07 01:58:12,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:12,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-11-07 01:58:12,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616198359] [2020-11-07 01:58:12,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 01:58:12,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:12,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 01:58:12,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2020-11-07 01:58:12,195 INFO L87 Difference]: Start difference. First operand 402 states and 421 transitions. Second operand 25 states. [2020-11-07 01:58:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:14,934 INFO L93 Difference]: Finished difference Result 1019 states and 1079 transitions. [2020-11-07 01:58:14,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-07 01:58:14,934 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 245 [2020-11-07 01:58:14,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:14,939 INFO L225 Difference]: With dead ends: 1019 [2020-11-07 01:58:14,939 INFO L226 Difference]: Without dead ends: 897 [2020-11-07 01:58:14,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1070, Invalid=6070, Unknown=0, NotChecked=0, Total=7140 [2020-11-07 01:58:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-11-07 01:58:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 454. [2020-11-07 01:58:15,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-11-07 01:58:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 476 transitions. [2020-11-07 01:58:15,024 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 476 transitions. Word has length 245 [2020-11-07 01:58:15,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:15,024 INFO L481 AbstractCegarLoop]: Abstraction has 454 states and 476 transitions. [2020-11-07 01:58:15,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 01:58:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 476 transitions. [2020-11-07 01:58:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-11-07 01:58:15,026 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:15,026 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:15,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 01:58:15,026 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:15,027 INFO L82 PathProgramCache]: Analyzing trace with hash -59936508, now seen corresponding path program 4 times [2020-11-07 01:58:15,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:15,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939860595] [2020-11-07 01:58:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:15,092 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:15,093 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:15,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:15,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939860595] [2020-11-07 01:58:15,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:15,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-11-07 01:58:15,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716101213] [2020-11-07 01:58:15,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 01:58:15,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:15,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 01:58:15,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-11-07 01:58:15,638 INFO L87 Difference]: Start difference. First operand 454 states and 476 transitions. Second operand 27 states. [2020-11-07 01:58:18,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:18,557 INFO L93 Difference]: Finished difference Result 876 states and 926 transitions. [2020-11-07 01:58:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-11-07 01:58:18,558 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 251 [2020-11-07 01:58:18,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:18,562 INFO L225 Difference]: With dead ends: 876 [2020-11-07 01:58:18,562 INFO L226 Difference]: Without dead ends: 763 [2020-11-07 01:58:18,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=901, Invalid=5741, Unknown=0, NotChecked=0, Total=6642 [2020-11-07 01:58:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2020-11-07 01:58:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 510. [2020-11-07 01:58:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510 states. [2020-11-07 01:58:18,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 536 transitions. [2020-11-07 01:58:18,717 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 536 transitions. Word has length 251 [2020-11-07 01:58:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:18,718 INFO L481 AbstractCegarLoop]: Abstraction has 510 states and 536 transitions. [2020-11-07 01:58:18,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 01:58:18,718 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 536 transitions. [2020-11-07 01:58:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-11-07 01:58:18,720 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:18,720 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:18,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 01:58:18,721 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:18,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:18,722 INFO L82 PathProgramCache]: Analyzing trace with hash -998024436, now seen corresponding path program 5 times [2020-11-07 01:58:18,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:18,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548911277] [2020-11-07 01:58:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:18,791 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:18,794 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:19,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:19,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548911277] [2020-11-07 01:58:19,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:19,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-11-07 01:58:19,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004600132] [2020-11-07 01:58:19,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 01:58:19,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:19,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 01:58:19,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2020-11-07 01:58:19,323 INFO L87 Difference]: Start difference. First operand 510 states and 536 transitions. Second operand 27 states. [2020-11-07 01:58:21,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:21,857 INFO L93 Difference]: Finished difference Result 943 states and 1001 transitions. [2020-11-07 01:58:21,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-07 01:58:21,858 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 251 [2020-11-07 01:58:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:21,863 INFO L225 Difference]: With dead ends: 943 [2020-11-07 01:58:21,863 INFO L226 Difference]: Without dead ends: 814 [2020-11-07 01:58:21,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1406, Invalid=5566, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 01:58:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-11-07 01:58:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 516. [2020-11-07 01:58:21,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-11-07 01:58:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 542 transitions. [2020-11-07 01:58:21,990 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 542 transitions. Word has length 251 [2020-11-07 01:58:21,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:21,990 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 542 transitions. [2020-11-07 01:58:21,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 01:58:21,991 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 542 transitions. [2020-11-07 01:58:21,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-11-07 01:58:21,992 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:21,992 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:21,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 01:58:21,993 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:21,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1573214308, now seen corresponding path program 6 times [2020-11-07 01:58:21,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:21,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731547215] [2020-11-07 01:58:21,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:22,062 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:22,064 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:22,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:22,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731547215] [2020-11-07 01:58:22,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:22,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-11-07 01:58:22,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474307979] [2020-11-07 01:58:22,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 01:58:22,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:22,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 01:58:22,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2020-11-07 01:58:22,654 INFO L87 Difference]: Start difference. First operand 516 states and 542 transitions. Second operand 28 states. [2020-11-07 01:58:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:24,819 INFO L93 Difference]: Finished difference Result 660 states and 694 transitions. [2020-11-07 01:58:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 01:58:24,820 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 257 [2020-11-07 01:58:24,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:24,823 INFO L225 Difference]: With dead ends: 660 [2020-11-07 01:58:24,823 INFO L226 Difference]: Without dead ends: 466 [2020-11-07 01:58:24,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=597, Invalid=3435, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 01:58:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-11-07 01:58:24,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 466. [2020-11-07 01:58:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-11-07 01:58:24,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 490 transitions. [2020-11-07 01:58:24,941 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 490 transitions. Word has length 257 [2020-11-07 01:58:24,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:24,942 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 490 transitions. [2020-11-07 01:58:24,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 01:58:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 490 transitions. [2020-11-07 01:58:24,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-11-07 01:58:24,943 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:24,944 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:24,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 01:58:24,944 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:24,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:24,944 INFO L82 PathProgramCache]: Analyzing trace with hash -429623700, now seen corresponding path program 7 times [2020-11-07 01:58:24,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:24,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494335453] [2020-11-07 01:58:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:25,014 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:25,015 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:25,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:25,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494335453] [2020-11-07 01:58:25,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:25,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-11-07 01:58:25,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098211351] [2020-11-07 01:58:25,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 01:58:25,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:25,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 01:58:25,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2020-11-07 01:58:25,617 INFO L87 Difference]: Start difference. First operand 466 states and 490 transitions. Second operand 29 states. [2020-11-07 01:58:29,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:29,992 INFO L93 Difference]: Finished difference Result 1031 states and 1090 transitions. [2020-11-07 01:58:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-11-07 01:58:29,993 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 257 [2020-11-07 01:58:29,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:29,999 INFO L225 Difference]: With dead ends: 1031 [2020-11-07 01:58:29,999 INFO L226 Difference]: Without dead ends: 909 [2020-11-07 01:58:30,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4377 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1825, Invalid=11515, Unknown=0, NotChecked=0, Total=13340 [2020-11-07 01:58:30,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2020-11-07 01:58:30,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 514. [2020-11-07 01:58:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-11-07 01:58:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 541 transitions. [2020-11-07 01:58:30,153 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 541 transitions. Word has length 257 [2020-11-07 01:58:30,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:30,154 INFO L481 AbstractCegarLoop]: Abstraction has 514 states and 541 transitions. [2020-11-07 01:58:30,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 01:58:30,154 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 541 transitions. [2020-11-07 01:58:30,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-11-07 01:58:30,155 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:30,155 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:30,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 01:58:30,156 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash -700467756, now seen corresponding path program 8 times [2020-11-07 01:58:30,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:30,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964248096] [2020-11-07 01:58:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:30,233 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:30,235 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:30,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:30,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964248096] [2020-11-07 01:58:30,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:30,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-11-07 01:58:30,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372990620] [2020-11-07 01:58:30,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 01:58:30,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:30,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 01:58:30,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2020-11-07 01:58:30,940 INFO L87 Difference]: Start difference. First operand 514 states and 541 transitions. Second operand 31 states. [2020-11-07 01:58:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:33,670 INFO L93 Difference]: Finished difference Result 751 states and 794 transitions. [2020-11-07 01:58:33,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-07 01:58:33,671 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 257 [2020-11-07 01:58:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:33,675 INFO L225 Difference]: With dead ends: 751 [2020-11-07 01:58:33,675 INFO L226 Difference]: Without dead ends: 743 [2020-11-07 01:58:33,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=920, Invalid=4192, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 01:58:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2020-11-07 01:58:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 627. [2020-11-07 01:58:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2020-11-07 01:58:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 663 transitions. [2020-11-07 01:58:33,923 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 663 transitions. Word has length 257 [2020-11-07 01:58:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:33,924 INFO L481 AbstractCegarLoop]: Abstraction has 627 states and 663 transitions. [2020-11-07 01:58:33,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 01:58:33,924 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 663 transitions. [2020-11-07 01:58:33,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-11-07 01:58:33,926 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:33,927 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:33,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 01:58:33,927 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:33,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1356025908, now seen corresponding path program 9 times [2020-11-07 01:58:33,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:33,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115328612] [2020-11-07 01:58:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:33,993 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:33,994 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:34,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:34,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115328612] [2020-11-07 01:58:34,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:34,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-11-07 01:58:34,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883791094] [2020-11-07 01:58:34,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-07 01:58:34,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:34,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-07 01:58:34,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2020-11-07 01:58:34,620 INFO L87 Difference]: Start difference. First operand 627 states and 663 transitions. Second operand 30 states. [2020-11-07 01:58:37,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:37,786 INFO L93 Difference]: Finished difference Result 935 states and 987 transitions. [2020-11-07 01:58:37,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-11-07 01:58:37,787 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 263 [2020-11-07 01:58:37,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:37,791 INFO L225 Difference]: With dead ends: 935 [2020-11-07 01:58:37,791 INFO L226 Difference]: Without dead ends: 533 [2020-11-07 01:58:37,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=970, Invalid=5510, Unknown=0, NotChecked=0, Total=6480 [2020-11-07 01:58:37,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-11-07 01:58:37,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2020-11-07 01:58:37,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-11-07 01:58:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 563 transitions. [2020-11-07 01:58:37,967 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 563 transitions. Word has length 263 [2020-11-07 01:58:37,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:37,968 INFO L481 AbstractCegarLoop]: Abstraction has 533 states and 563 transitions. [2020-11-07 01:58:37,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-07 01:58:37,968 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 563 transitions. [2020-11-07 01:58:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-11-07 01:58:37,972 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:37,972 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:37,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 01:58:37,973 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:37,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:37,974 INFO L82 PathProgramCache]: Analyzing trace with hash -755050188, now seen corresponding path program 10 times [2020-11-07 01:58:37,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:37,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970813379] [2020-11-07 01:58:37,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:38,040 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:38,041 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:38,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:38,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970813379] [2020-11-07 01:58:38,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:38,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-11-07 01:58:38,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935511935] [2020-11-07 01:58:38,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 01:58:38,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:38,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 01:58:38,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2020-11-07 01:58:38,807 INFO L87 Difference]: Start difference. First operand 533 states and 563 transitions. Second operand 32 states. [2020-11-07 01:58:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:43,039 INFO L93 Difference]: Finished difference Result 889 states and 938 transitions. [2020-11-07 01:58:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-07 01:58:43,040 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 269 [2020-11-07 01:58:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:43,043 INFO L225 Difference]: With dead ends: 889 [2020-11-07 01:58:43,043 INFO L226 Difference]: Without dead ends: 321 [2020-11-07 01:58:43,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2603 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1404, Invalid=7908, Unknown=0, NotChecked=0, Total=9312 [2020-11-07 01:58:43,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-11-07 01:58:43,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2020-11-07 01:58:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-07 01:58:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 332 transitions. [2020-11-07 01:58:43,115 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 332 transitions. Word has length 269 [2020-11-07 01:58:43,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:43,116 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 332 transitions. [2020-11-07 01:58:43,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 01:58:43,116 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 332 transitions. [2020-11-07 01:58:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-11-07 01:58:43,118 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:43,118 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:43,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 01:58:43,118 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2102832284, now seen corresponding path program 11 times [2020-11-07 01:58:43,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:43,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111076946] [2020-11-07 01:58:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:43,199 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:43,200 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:43,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:43,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111076946] [2020-11-07 01:58:43,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:43,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-11-07 01:58:43,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969390146] [2020-11-07 01:58:43,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 01:58:43,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:43,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 01:58:43,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2020-11-07 01:58:43,828 INFO L87 Difference]: Start difference. First operand 318 states and 332 transitions. Second operand 29 states. [2020-11-07 01:58:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:46,303 INFO L93 Difference]: Finished difference Result 813 states and 861 transitions. [2020-11-07 01:58:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-07 01:58:46,304 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 269 [2020-11-07 01:58:46,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:46,307 INFO L225 Difference]: With dead ends: 813 [2020-11-07 01:58:46,307 INFO L226 Difference]: Without dead ends: 670 [2020-11-07 01:58:46,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=801, Invalid=4029, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 01:58:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-11-07 01:58:46,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 404. [2020-11-07 01:58:46,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-11-07 01:58:46,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 424 transitions. [2020-11-07 01:58:46,406 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 424 transitions. Word has length 269 [2020-11-07 01:58:46,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:46,406 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 424 transitions. [2020-11-07 01:58:46,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 01:58:46,406 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 424 transitions. [2020-11-07 01:58:46,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-11-07 01:58:46,408 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:46,408 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:46,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 01:58:46,409 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:46,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1487808516, now seen corresponding path program 12 times [2020-11-07 01:58:46,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:46,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606159236] [2020-11-07 01:58:46,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:46,482 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:46,483 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:47,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:47,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606159236] [2020-11-07 01:58:47,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:47,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-11-07 01:58:47,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74518006] [2020-11-07 01:58:47,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 01:58:47,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:47,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 01:58:47,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2020-11-07 01:58:47,275 INFO L87 Difference]: Start difference. First operand 404 states and 424 transitions. Second operand 31 states. [2020-11-07 01:58:49,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:49,710 INFO L93 Difference]: Finished difference Result 687 states and 728 transitions. [2020-11-07 01:58:49,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-07 01:58:49,711 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 275 [2020-11-07 01:58:49,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:49,714 INFO L225 Difference]: With dead ends: 687 [2020-11-07 01:58:49,714 INFO L226 Difference]: Without dead ends: 546 [2020-11-07 01:58:49,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1198, Invalid=4964, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 01:58:49,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-11-07 01:58:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 410. [2020-11-07 01:58:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-11-07 01:58:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 430 transitions. [2020-11-07 01:58:49,812 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 430 transitions. Word has length 275 [2020-11-07 01:58:49,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:49,812 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 430 transitions. [2020-11-07 01:58:49,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 01:58:49,813 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 430 transitions. [2020-11-07 01:58:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-11-07 01:58:49,815 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:49,815 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:49,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 01:58:49,816 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:49,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:49,816 INFO L82 PathProgramCache]: Analyzing trace with hash 336152420, now seen corresponding path program 13 times [2020-11-07 01:58:49,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:49,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994868525] [2020-11-07 01:58:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:49,902 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:49,904 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:50,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:50,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994868525] [2020-11-07 01:58:50,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:50,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-11-07 01:58:50,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932244441] [2020-11-07 01:58:50,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 01:58:50,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:50,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 01:58:50,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 01:58:50,739 INFO L87 Difference]: Start difference. First operand 410 states and 430 transitions. Second operand 33 states. [2020-11-07 01:58:55,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:55,162 INFO L93 Difference]: Finished difference Result 955 states and 1011 transitions. [2020-11-07 01:58:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-07 01:58:55,164 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 281 [2020-11-07 01:58:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:55,167 INFO L225 Difference]: With dead ends: 955 [2020-11-07 01:58:55,168 INFO L226 Difference]: Without dead ends: 812 [2020-11-07 01:58:55,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1470, Invalid=8630, Unknown=0, NotChecked=0, Total=10100 [2020-11-07 01:58:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2020-11-07 01:58:55,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 458. [2020-11-07 01:58:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-11-07 01:58:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 481 transitions. [2020-11-07 01:58:55,298 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 481 transitions. Word has length 281 [2020-11-07 01:58:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:55,298 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 481 transitions. [2020-11-07 01:58:55,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 01:58:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 481 transitions. [2020-11-07 01:58:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-11-07 01:58:55,300 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:55,300 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:55,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 01:58:55,301 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:55,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2052836660, now seen corresponding path program 14 times [2020-11-07 01:58:55,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:55,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218099398] [2020-11-07 01:58:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:55,375 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:55,377 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:56,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:56,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218099398] [2020-11-07 01:58:56,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:56,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-11-07 01:58:56,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745977894] [2020-11-07 01:58:56,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 01:58:56,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:56,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 01:58:56,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 01:58:56,194 INFO L87 Difference]: Start difference. First operand 458 states and 481 transitions. Second operand 35 states. [2020-11-07 01:58:59,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:59,049 INFO L93 Difference]: Finished difference Result 620 states and 653 transitions. [2020-11-07 01:58:59,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-07 01:58:59,050 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 281 [2020-11-07 01:58:59,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:59,053 INFO L225 Difference]: With dead ends: 620 [2020-11-07 01:58:59,053 INFO L226 Difference]: Without dead ends: 612 [2020-11-07 01:58:59,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1174, Invalid=5306, Unknown=0, NotChecked=0, Total=6480 [2020-11-07 01:58:59,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-11-07 01:58:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 583. [2020-11-07 01:58:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-11-07 01:58:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 616 transitions. [2020-11-07 01:58:59,276 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 616 transitions. Word has length 281 [2020-11-07 01:58:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:59,276 INFO L481 AbstractCegarLoop]: Abstraction has 583 states and 616 transitions. [2020-11-07 01:58:59,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 01:58:59,276 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 616 transitions. [2020-11-07 01:58:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-11-07 01:58:59,279 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:59,279 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:59,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 01:58:59,279 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:59,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:59,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1476523564, now seen corresponding path program 15 times [2020-11-07 01:58:59,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:59,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551570376] [2020-11-07 01:58:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:59,353 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:59,355 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:00,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:00,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551570376] [2020-11-07 01:59:00,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:00,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-11-07 01:59:00,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867630345] [2020-11-07 01:59:00,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 01:59:00,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:00,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 01:59:00,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 01:59:00,234 INFO L87 Difference]: Start difference. First operand 583 states and 616 transitions. Second operand 36 states. [2020-11-07 01:59:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:05,168 INFO L93 Difference]: Finished difference Result 1129 states and 1195 transitions. [2020-11-07 01:59:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-11-07 01:59:05,169 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 293 [2020-11-07 01:59:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:05,172 INFO L225 Difference]: With dead ends: 1129 [2020-11-07 01:59:05,172 INFO L226 Difference]: Without dead ends: 345 [2020-11-07 01:59:05,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3788 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1930, Invalid=11180, Unknown=0, NotChecked=0, Total=13110 [2020-11-07 01:59:05,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-11-07 01:59:05,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2020-11-07 01:59:05,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-11-07 01:59:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 357 transitions. [2020-11-07 01:59:05,239 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 357 transitions. Word has length 293 [2020-11-07 01:59:05,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:05,239 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 357 transitions. [2020-11-07 01:59:05,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 01:59:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 357 transitions. [2020-11-07 01:59:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-11-07 01:59:05,240 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:05,240 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:05,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 01:59:05,241 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:05,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:05,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1127254636, now seen corresponding path program 16 times [2020-11-07 01:59:05,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:05,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616860769] [2020-11-07 01:59:05,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:05,313 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:05,314 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:06,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:06,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616860769] [2020-11-07 01:59:06,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:06,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-11-07 01:59:06,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736452775] [2020-11-07 01:59:06,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 01:59:06,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:06,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 01:59:06,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 01:59:06,082 INFO L87 Difference]: Start difference. First operand 342 states and 357 transitions. Second operand 33 states. [2020-11-07 01:59:09,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:09,165 INFO L93 Difference]: Finished difference Result 947 states and 1004 transitions. [2020-11-07 01:59:09,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-11-07 01:59:09,166 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 293 [2020-11-07 01:59:09,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:09,170 INFO L225 Difference]: With dead ends: 947 [2020-11-07 01:59:09,170 INFO L226 Difference]: Without dead ends: 783 [2020-11-07 01:59:09,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1085, Invalid=5557, Unknown=0, NotChecked=0, Total=6642 [2020-11-07 01:59:09,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2020-11-07 01:59:09,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 450. [2020-11-07 01:59:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-11-07 01:59:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 472 transitions. [2020-11-07 01:59:09,279 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 472 transitions. Word has length 293 [2020-11-07 01:59:09,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:09,280 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 472 transitions. [2020-11-07 01:59:09,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 01:59:09,280 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 472 transitions. [2020-11-07 01:59:09,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-11-07 01:59:09,282 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:09,282 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:09,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 01:59:09,283 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:09,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1413138180, now seen corresponding path program 17 times [2020-11-07 01:59:09,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:09,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963712194] [2020-11-07 01:59:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:09,356 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:09,357 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:10,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:10,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963712194] [2020-11-07 01:59:10,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:10,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-11-07 01:59:10,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583915213] [2020-11-07 01:59:10,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 01:59:10,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:10,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 01:59:10,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 01:59:10,189 INFO L87 Difference]: Start difference. First operand 450 states and 472 transitions. Second operand 35 states. [2020-11-07 01:59:13,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:13,011 INFO L93 Difference]: Finished difference Result 761 states and 807 transitions. [2020-11-07 01:59:13,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-11-07 01:59:13,012 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 299 [2020-11-07 01:59:13,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:13,015 INFO L225 Difference]: With dead ends: 761 [2020-11-07 01:59:13,015 INFO L226 Difference]: Without dead ends: 608 [2020-11-07 01:59:13,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1588, Invalid=6602, Unknown=0, NotChecked=0, Total=8190 [2020-11-07 01:59:13,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2020-11-07 01:59:13,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 456. [2020-11-07 01:59:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-11-07 01:59:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 478 transitions. [2020-11-07 01:59:13,153 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 478 transitions. Word has length 299 [2020-11-07 01:59:13,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:13,153 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 478 transitions. [2020-11-07 01:59:13,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 01:59:13,153 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 478 transitions. [2020-11-07 01:59:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-11-07 01:59:13,161 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:13,161 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:13,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 01:59:13,161 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:13,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:13,162 INFO L82 PathProgramCache]: Analyzing trace with hash -122921892, now seen corresponding path program 18 times [2020-11-07 01:59:13,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:13,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715635620] [2020-11-07 01:59:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:13,233 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:13,235 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:14,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:14,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715635620] [2020-11-07 01:59:14,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:14,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-11-07 01:59:14,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661410489] [2020-11-07 01:59:14,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 01:59:14,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:14,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 01:59:14,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 01:59:14,179 INFO L87 Difference]: Start difference. First operand 456 states and 478 transitions. Second operand 37 states. [2020-11-07 01:59:19,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:19,588 INFO L93 Difference]: Finished difference Result 1128 states and 1196 transitions. [2020-11-07 01:59:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-11-07 01:59:19,589 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 305 [2020-11-07 01:59:19,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:19,594 INFO L225 Difference]: With dead ends: 1128 [2020-11-07 01:59:19,594 INFO L226 Difference]: Without dead ends: 964 [2020-11-07 01:59:19,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3924 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1949, Invalid=11623, Unknown=0, NotChecked=0, Total=13572 [2020-11-07 01:59:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-11-07 01:59:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 508. [2020-11-07 01:59:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-11-07 01:59:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 534 transitions. [2020-11-07 01:59:19,769 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 534 transitions. Word has length 305 [2020-11-07 01:59:19,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:19,770 INFO L481 AbstractCegarLoop]: Abstraction has 508 states and 534 transitions. [2020-11-07 01:59:19,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 01:59:19,770 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 534 transitions. [2020-11-07 01:59:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-11-07 01:59:19,772 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:19,772 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:19,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 01:59:19,772 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:19,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:19,773 INFO L82 PathProgramCache]: Analyzing trace with hash 756216772, now seen corresponding path program 19 times [2020-11-07 01:59:19,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:19,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111581858] [2020-11-07 01:59:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:19,844 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:19,846 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:20,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:20,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111581858] [2020-11-07 01:59:20,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:20,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-11-07 01:59:20,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248101980] [2020-11-07 01:59:20,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 01:59:20,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:20,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 01:59:20,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 01:59:20,890 INFO L87 Difference]: Start difference. First operand 508 states and 534 transitions. Second operand 39 states. [2020-11-07 01:59:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:24,484 INFO L93 Difference]: Finished difference Result 698 states and 736 transitions. [2020-11-07 01:59:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-11-07 01:59:24,485 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 305 [2020-11-07 01:59:24,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:24,489 INFO L225 Difference]: With dead ends: 698 [2020-11-07 01:59:24,489 INFO L226 Difference]: Without dead ends: 690 [2020-11-07 01:59:24,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1497, Invalid=6693, Unknown=0, NotChecked=0, Total=8190 [2020-11-07 01:59:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2020-11-07 01:59:24,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 657. [2020-11-07 01:59:24,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2020-11-07 01:59:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 695 transitions. [2020-11-07 01:59:24,719 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 695 transitions. Word has length 305 [2020-11-07 01:59:24,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:24,719 INFO L481 AbstractCegarLoop]: Abstraction has 657 states and 695 transitions. [2020-11-07 01:59:24,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 01:59:24,719 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 695 transitions. [2020-11-07 01:59:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-11-07 01:59:24,722 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:24,723 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:24,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 01:59:24,723 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:24,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:24,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1488803620, now seen corresponding path program 20 times [2020-11-07 01:59:24,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:24,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694028925] [2020-11-07 01:59:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:24,793 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:24,794 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:25,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:25,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694028925] [2020-11-07 01:59:25,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:25,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-11-07 01:59:25,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982455777] [2020-11-07 01:59:25,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 01:59:25,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:25,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 01:59:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 01:59:25,852 INFO L87 Difference]: Start difference. First operand 657 states and 695 transitions. Second operand 40 states. [2020-11-07 01:59:32,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:32,627 INFO L93 Difference]: Finished difference Result 1361 states and 1444 transitions. [2020-11-07 01:59:32,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-11-07 01:59:32,628 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 317 [2020-11-07 01:59:32,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:32,630 INFO L225 Difference]: With dead ends: 1361 [2020-11-07 01:59:32,630 INFO L226 Difference]: Without dead ends: 369 [2020-11-07 01:59:32,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5197 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2537, Invalid=15019, Unknown=0, NotChecked=0, Total=17556 [2020-11-07 01:59:32,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-11-07 01:59:32,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 366. [2020-11-07 01:59:32,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-11-07 01:59:32,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 382 transitions. [2020-11-07 01:59:32,747 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 382 transitions. Word has length 317 [2020-11-07 01:59:32,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:32,747 INFO L481 AbstractCegarLoop]: Abstraction has 366 states and 382 transitions. [2020-11-07 01:59:32,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 01:59:32,747 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 382 transitions. [2020-11-07 01:59:32,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-11-07 01:59:32,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:32,748 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:32,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 01:59:32,749 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:32,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:32,749 INFO L82 PathProgramCache]: Analyzing trace with hash 51151500, now seen corresponding path program 21 times [2020-11-07 01:59:32,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:32,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567049393] [2020-11-07 01:59:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:32,816 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:32,817 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:33,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:33,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567049393] [2020-11-07 01:59:33,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:33,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-11-07 01:59:33,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772857662] [2020-11-07 01:59:33,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 01:59:33,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:33,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 01:59:33,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 01:59:33,753 INFO L87 Difference]: Start difference. First operand 366 states and 382 transitions. Second operand 37 states. [2020-11-07 01:59:37,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:37,736 INFO L93 Difference]: Finished difference Result 1093 states and 1160 transitions. [2020-11-07 01:59:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-07 01:59:37,737 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 317 [2020-11-07 01:59:37,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:37,742 INFO L225 Difference]: With dead ends: 1093 [2020-11-07 01:59:37,742 INFO L226 Difference]: Without dead ends: 908 [2020-11-07 01:59:37,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1412, Invalid=7330, Unknown=0, NotChecked=0, Total=8742 [2020-11-07 01:59:37,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2020-11-07 01:59:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 500. [2020-11-07 01:59:37,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-11-07 01:59:37,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 525 transitions. [2020-11-07 01:59:37,892 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 525 transitions. Word has length 317 [2020-11-07 01:59:37,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:37,892 INFO L481 AbstractCegarLoop]: Abstraction has 500 states and 525 transitions. [2020-11-07 01:59:37,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 01:59:37,892 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 525 transitions. [2020-11-07 01:59:37,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-11-07 01:59:37,894 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:37,894 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:37,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 01:59:37,895 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:37,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:37,895 INFO L82 PathProgramCache]: Analyzing trace with hash 558403060, now seen corresponding path program 22 times [2020-11-07 01:59:37,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:37,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754614727] [2020-11-07 01:59:37,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:37,967 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:37,969 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:38,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:39,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754614727] [2020-11-07 01:59:39,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:39,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-11-07 01:59:39,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073352938] [2020-11-07 01:59:39,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 01:59:39,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:39,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 01:59:39,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 01:59:39,090 INFO L87 Difference]: Start difference. First operand 500 states and 525 transitions. Second operand 39 states. [2020-11-07 01:59:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:42,638 INFO L93 Difference]: Finished difference Result 835 states and 886 transitions. [2020-11-07 01:59:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-11-07 01:59:42,639 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 323 [2020-11-07 01:59:42,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:42,643 INFO L225 Difference]: With dead ends: 835 [2020-11-07 01:59:42,643 INFO L226 Difference]: Without dead ends: 670 [2020-11-07 01:59:42,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2968 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2033, Invalid=8473, Unknown=0, NotChecked=0, Total=10506 [2020-11-07 01:59:42,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-11-07 01:59:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 506. [2020-11-07 01:59:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-11-07 01:59:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 531 transitions. [2020-11-07 01:59:42,800 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 531 transitions. Word has length 323 [2020-11-07 01:59:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:42,800 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 531 transitions. [2020-11-07 01:59:42,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 01:59:42,800 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 531 transitions. [2020-11-07 01:59:42,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-11-07 01:59:42,801 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:42,802 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:42,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-07 01:59:42,802 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:42,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:42,802 INFO L82 PathProgramCache]: Analyzing trace with hash 802010452, now seen corresponding path program 23 times [2020-11-07 01:59:42,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:42,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394239695] [2020-11-07 01:59:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:42,871 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:42,872 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:43,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:43,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394239695] [2020-11-07 01:59:43,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:43,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-11-07 01:59:43,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25982959] [2020-11-07 01:59:43,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 01:59:43,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:43,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 01:59:43,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 01:59:43,994 INFO L87 Difference]: Start difference. First operand 506 states and 531 transitions. Second operand 41 states. [2020-11-07 01:59:50,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:50,931 INFO L93 Difference]: Finished difference Result 1313 states and 1394 transitions. [2020-11-07 01:59:50,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-11-07 01:59:50,933 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 329 [2020-11-07 01:59:50,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:50,937 INFO L225 Difference]: With dead ends: 1313 [2020-11-07 01:59:50,937 INFO L226 Difference]: Without dead ends: 1128 [2020-11-07 01:59:50,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5169 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2496, Invalid=15060, Unknown=0, NotChecked=0, Total=17556 [2020-11-07 01:59:50,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2020-11-07 01:59:51,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 566. [2020-11-07 01:59:51,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-11-07 01:59:51,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 595 transitions. [2020-11-07 01:59:51,173 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 595 transitions. Word has length 329 [2020-11-07 01:59:51,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:51,174 INFO L481 AbstractCegarLoop]: Abstraction has 566 states and 595 transitions. [2020-11-07 01:59:51,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 01:59:51,174 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 595 transitions. [2020-11-07 01:59:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-11-07 01:59:51,175 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:51,175 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:51,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-07 01:59:51,176 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:51,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:51,176 INFO L82 PathProgramCache]: Analyzing trace with hash 109836476, now seen corresponding path program 24 times [2020-11-07 01:59:51,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:51,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641873455] [2020-11-07 01:59:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:51,248 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:51,250 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:52,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:52,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641873455] [2020-11-07 01:59:52,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:52,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-11-07 01:59:52,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181211985] [2020-11-07 01:59:52,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 01:59:52,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:52,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 01:59:52,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 01:59:52,549 INFO L87 Difference]: Start difference. First operand 566 states and 595 transitions. Second operand 43 states. [2020-11-07 01:59:56,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:56,981 INFO L93 Difference]: Finished difference Result 776 states and 819 transitions. [2020-11-07 01:59:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-07 01:59:56,982 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 329 [2020-11-07 01:59:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:56,986 INFO L225 Difference]: With dead ends: 776 [2020-11-07 01:59:56,986 INFO L226 Difference]: Without dead ends: 768 [2020-11-07 01:59:56,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1860, Invalid=8240, Unknown=0, NotChecked=0, Total=10100 [2020-11-07 01:59:56,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-11-07 01:59:57,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 731. [2020-11-07 01:59:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-11-07 01:59:57,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 774 transitions. [2020-11-07 01:59:57,296 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 774 transitions. Word has length 329 [2020-11-07 01:59:57,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:57,296 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 774 transitions. [2020-11-07 01:59:57,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 01:59:57,297 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 774 transitions. [2020-11-07 01:59:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-11-07 01:59:57,299 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:57,299 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:57,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-07 01:59:57,300 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:57,300 INFO L82 PathProgramCache]: Analyzing trace with hash 816905244, now seen corresponding path program 25 times [2020-11-07 01:59:57,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:57,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941573755] [2020-11-07 01:59:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:57,375 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:57,377 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:58,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:58,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941573755] [2020-11-07 01:59:58,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:58,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-11-07 01:59:58,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167427544] [2020-11-07 01:59:58,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-07 01:59:58,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:58,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-07 01:59:58,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1681, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 01:59:58,718 INFO L87 Difference]: Start difference. First operand 731 states and 774 transitions. Second operand 44 states. [2020-11-07 02:00:07,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:07,364 INFO L93 Difference]: Finished difference Result 1605 states and 1706 transitions. [2020-11-07 02:00:07,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-11-07 02:00:07,365 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 341 [2020-11-07 02:00:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:07,368 INFO L225 Difference]: With dead ends: 1605 [2020-11-07 02:00:07,368 INFO L226 Difference]: Without dead ends: 393 [2020-11-07 02:00:07,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6830 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3225, Invalid=19425, Unknown=0, NotChecked=0, Total=22650 [2020-11-07 02:00:07,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-11-07 02:00:07,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 390. [2020-11-07 02:00:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-11-07 02:00:07,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 407 transitions. [2020-11-07 02:00:07,515 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 407 transitions. Word has length 341 [2020-11-07 02:00:07,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:07,515 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 407 transitions. [2020-11-07 02:00:07,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-07 02:00:07,515 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 407 transitions. [2020-11-07 02:00:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-11-07 02:00:07,516 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:07,517 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:00:07,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-07 02:00:07,517 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1978805372, now seen corresponding path program 26 times [2020-11-07 02:00:07,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:07,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95145000] [2020-11-07 02:00:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:07,593 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:07,594 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:08,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:08,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95145000] [2020-11-07 02:00:08,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:08,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-11-07 02:00:08,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446232969] [2020-11-07 02:00:08,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 02:00:08,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:08,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 02:00:08,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 02:00:08,813 INFO L87 Difference]: Start difference. First operand 390 states and 407 transitions. Second operand 41 states. [2020-11-07 02:00:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:14,060 INFO L93 Difference]: Finished difference Result 1251 states and 1329 transitions. [2020-11-07 02:00:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-07 02:00:14,061 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 341 [2020-11-07 02:00:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:14,065 INFO L225 Difference]: With dead ends: 1251 [2020-11-07 02:00:14,065 INFO L226 Difference]: Without dead ends: 1045 [2020-11-07 02:00:14,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1782, Invalid=9348, Unknown=0, NotChecked=0, Total=11130 [2020-11-07 02:00:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2020-11-07 02:00:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 550. [2020-11-07 02:00:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 550 states. [2020-11-07 02:00:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 578 transitions. [2020-11-07 02:00:14,278 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 578 transitions. Word has length 341 [2020-11-07 02:00:14,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:14,278 INFO L481 AbstractCegarLoop]: Abstraction has 550 states and 578 transitions. [2020-11-07 02:00:14,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 02:00:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 578 transitions. [2020-11-07 02:00:14,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-11-07 02:00:14,280 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:14,280 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:00:14,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-07 02:00:14,281 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:14,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2067277548, now seen corresponding path program 27 times [2020-11-07 02:00:14,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:14,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424293626] [2020-11-07 02:00:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:14,358 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:14,359 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:15,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:15,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424293626] [2020-11-07 02:00:15,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:15,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-11-07 02:00:15,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161683225] [2020-11-07 02:00:15,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 02:00:15,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:15,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 02:00:15,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 02:00:15,699 INFO L87 Difference]: Start difference. First operand 550 states and 578 transitions. Second operand 43 states. [2020-11-07 02:00:20,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:20,169 INFO L93 Difference]: Finished difference Result 909 states and 965 transitions. [2020-11-07 02:00:20,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-11-07 02:00:20,170 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 347 [2020-11-07 02:00:20,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:20,174 INFO L225 Difference]: With dead ends: 909 [2020-11-07 02:00:20,174 INFO L226 Difference]: Without dead ends: 732 [2020-11-07 02:00:20,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3774 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2533, Invalid=10577, Unknown=0, NotChecked=0, Total=13110 [2020-11-07 02:00:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2020-11-07 02:00:20,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 556. [2020-11-07 02:00:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-11-07 02:00:20,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 584 transitions. [2020-11-07 02:00:20,370 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 584 transitions. Word has length 347 [2020-11-07 02:00:20,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:20,370 INFO L481 AbstractCegarLoop]: Abstraction has 556 states and 584 transitions. [2020-11-07 02:00:20,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 02:00:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 584 transitions. [2020-11-07 02:00:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-11-07 02:00:20,372 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:20,372 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:00:20,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-11-07 02:00:20,372 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:20,373 INFO L82 PathProgramCache]: Analyzing trace with hash -210939316, now seen corresponding path program 28 times [2020-11-07 02:00:20,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:20,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260304715] [2020-11-07 02:00:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:20,449 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:20,450 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:21,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:21,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260304715] [2020-11-07 02:00:21,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:21,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-11-07 02:00:21,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569731674] [2020-11-07 02:00:21,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-07 02:00:21,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:21,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-07 02:00:21,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1739, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 02:00:21,937 INFO L87 Difference]: Start difference. First operand 556 states and 584 transitions. Second operand 45 states. [2020-11-07 02:00:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:30,791 INFO L93 Difference]: Finished difference Result 1510 states and 1605 transitions. [2020-11-07 02:00:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-11-07 02:00:30,792 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 353 [2020-11-07 02:00:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:30,798 INFO L225 Difference]: With dead ends: 1510 [2020-11-07 02:00:30,798 INFO L226 Difference]: Without dead ends: 1304 [2020-11-07 02:00:30,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6586 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=3111, Invalid=18941, Unknown=0, NotChecked=0, Total=22052 [2020-11-07 02:00:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2020-11-07 02:00:31,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 628. [2020-11-07 02:00:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2020-11-07 02:00:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 661 transitions. [2020-11-07 02:00:31,098 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 661 transitions. Word has length 353 [2020-11-07 02:00:31,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:31,099 INFO L481 AbstractCegarLoop]: Abstraction has 628 states and 661 transitions. [2020-11-07 02:00:31,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-07 02:00:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 661 transitions. [2020-11-07 02:00:31,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-11-07 02:00:31,101 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:31,101 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:00:31,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-11-07 02:00:31,101 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:31,102 INFO L82 PathProgramCache]: Analyzing trace with hash 177160628, now seen corresponding path program 29 times [2020-11-07 02:00:31,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:31,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129152105] [2020-11-07 02:00:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:31,180 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:31,181 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:32,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:32,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129152105] [2020-11-07 02:00:32,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:32,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-11-07 02:00:32,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410586773] [2020-11-07 02:00:32,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-07 02:00:32,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-07 02:00:32,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1907, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 02:00:32,800 INFO L87 Difference]: Start difference. First operand 628 states and 661 transitions. Second operand 47 states. [2020-11-07 02:00:37,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:37,820 INFO L93 Difference]: Finished difference Result 854 states and 902 transitions. [2020-11-07 02:00:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-11-07 02:00:37,821 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 353 [2020-11-07 02:00:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:37,824 INFO L225 Difference]: With dead ends: 854 [2020-11-07 02:00:37,825 INFO L226 Difference]: Without dead ends: 846 [2020-11-07 02:00:37,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2263, Invalid=9947, Unknown=0, NotChecked=0, Total=12210 [2020-11-07 02:00:37,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2020-11-07 02:00:38,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 805. [2020-11-07 02:00:38,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 805 states. [2020-11-07 02:00:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 853 transitions. [2020-11-07 02:00:38,302 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 853 transitions. Word has length 353 [2020-11-07 02:00:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:38,302 INFO L481 AbstractCegarLoop]: Abstraction has 805 states and 853 transitions. [2020-11-07 02:00:38,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-07 02:00:38,303 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 853 transitions. [2020-11-07 02:00:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-11-07 02:00:38,305 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:38,306 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:00:38,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-11-07 02:00:38,306 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:38,307 INFO L82 PathProgramCache]: Analyzing trace with hash 433906964, now seen corresponding path program 30 times [2020-11-07 02:00:38,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:38,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125480986] [2020-11-07 02:00:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:38,400 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:38,401 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:39,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:40,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125480986] [2020-11-07 02:00:40,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:40,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-11-07 02:00:40,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136001178] [2020-11-07 02:00:40,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-07 02:00:40,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:40,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-07 02:00:40,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2005, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 02:00:40,158 INFO L87 Difference]: Start difference. First operand 805 states and 853 transitions. Second operand 48 states. [2020-11-07 02:00:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:51,165 INFO L93 Difference]: Finished difference Result 1861 states and 1981 transitions. [2020-11-07 02:00:51,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-11-07 02:00:51,167 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 365 [2020-11-07 02:00:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:51,169 INFO L225 Difference]: With dead ends: 1861 [2020-11-07 02:00:51,169 INFO L226 Difference]: Without dead ends: 417 [2020-11-07 02:00:51,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8687 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3994, Invalid=24398, Unknown=0, NotChecked=0, Total=28392 [2020-11-07 02:00:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-11-07 02:00:51,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 414. [2020-11-07 02:00:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-11-07 02:00:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 432 transitions. [2020-11-07 02:00:51,323 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 432 transitions. Word has length 365 [2020-11-07 02:00:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:51,324 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 432 transitions. [2020-11-07 02:00:51,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-07 02:00:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 432 transitions. [2020-11-07 02:00:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-11-07 02:00:51,325 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:51,325 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:00:51,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-11-07 02:00:51,326 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:51,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:51,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1974245252, now seen corresponding path program 31 times [2020-11-07 02:00:51,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:51,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961528049] [2020-11-07 02:00:51,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:51,406 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:51,407 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:52,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:52,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961528049] [2020-11-07 02:00:52,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:52,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-11-07 02:00:52,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744330896] [2020-11-07 02:00:52,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-07 02:00:52,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:52,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-07 02:00:52,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1709, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 02:00:52,968 INFO L87 Difference]: Start difference. First operand 414 states and 432 transitions. Second operand 45 states. [2020-11-07 02:00:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:59,433 INFO L93 Difference]: Finished difference Result 1421 states and 1511 transitions. [2020-11-07 02:00:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-11-07 02:00:59,441 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 365 [2020-11-07 02:00:59,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:59,446 INFO L225 Difference]: With dead ends: 1421 [2020-11-07 02:00:59,446 INFO L226 Difference]: Without dead ends: 1194 [2020-11-07 02:00:59,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3561 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2195, Invalid=11611, Unknown=0, NotChecked=0, Total=13806 [2020-11-07 02:00:59,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2020-11-07 02:00:59,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 600. [2020-11-07 02:00:59,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-11-07 02:00:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 631 transitions. [2020-11-07 02:00:59,699 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 631 transitions. Word has length 365 [2020-11-07 02:00:59,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:59,700 INFO L481 AbstractCegarLoop]: Abstraction has 600 states and 631 transitions. [2020-11-07 02:00:59,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-07 02:00:59,700 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 631 transitions. [2020-11-07 02:00:59,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-11-07 02:00:59,702 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:59,703 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:00:59,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-11-07 02:00:59,703 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:59,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:59,703 INFO L82 PathProgramCache]: Analyzing trace with hash 2048132068, now seen corresponding path program 32 times [2020-11-07 02:00:59,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:59,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496767220] [2020-11-07 02:00:59,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:59,789 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:59,790 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:01,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:01,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496767220] [2020-11-07 02:01:01,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:01,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-11-07 02:01:01,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078628720] [2020-11-07 02:01:01,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-07 02:01:01,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:01,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-07 02:01:01,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1849, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 02:01:01,537 INFO L87 Difference]: Start difference. First operand 600 states and 631 transitions. Second operand 47 states. [2020-11-07 02:01:07,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:07,213 INFO L93 Difference]: Finished difference Result 983 states and 1044 transitions. [2020-11-07 02:01:07,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-11-07 02:01:07,214 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 371 [2020-11-07 02:01:07,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:07,218 INFO L225 Difference]: With dead ends: 983 [2020-11-07 02:01:07,219 INFO L226 Difference]: Without dead ends: 794 [2020-11-07 02:01:07,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3088, Invalid=12914, Unknown=0, NotChecked=0, Total=16002 [2020-11-07 02:01:07,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-11-07 02:01:07,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 606. [2020-11-07 02:01:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2020-11-07 02:01:07,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 637 transitions. [2020-11-07 02:01:07,457 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 637 transitions. Word has length 371 [2020-11-07 02:01:07,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:07,457 INFO L481 AbstractCegarLoop]: Abstraction has 606 states and 637 transitions. [2020-11-07 02:01:07,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-07 02:01:07,457 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 637 transitions. [2020-11-07 02:01:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-11-07 02:01:07,459 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:07,459 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:07,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-11-07 02:01:07,459 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:07,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:07,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1140116668, now seen corresponding path program 33 times [2020-11-07 02:01:07,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:07,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452299790] [2020-11-07 02:01:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:07,544 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:07,545 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:09,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:09,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452299790] [2020-11-07 02:01:09,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:09,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-11-07 02:01:09,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993534080] [2020-11-07 02:01:09,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-07 02:01:09,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:09,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-07 02:01:09,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2067, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 02:01:09,337 INFO L87 Difference]: Start difference. First operand 606 states and 637 transitions. Second operand 49 states. [2020-11-07 02:01:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:20,592 INFO L93 Difference]: Finished difference Result 1719 states and 1829 transitions. [2020-11-07 02:01:20,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-11-07 02:01:20,594 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 377 [2020-11-07 02:01:20,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:20,601 INFO L225 Difference]: With dead ends: 1719 [2020-11-07 02:01:20,601 INFO L226 Difference]: Without dead ends: 1492 [2020-11-07 02:01:20,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8175 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3794, Invalid=23266, Unknown=0, NotChecked=0, Total=27060 [2020-11-07 02:01:20,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2020-11-07 02:01:20,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 690. [2020-11-07 02:01:20,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-11-07 02:01:20,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 727 transitions. [2020-11-07 02:01:20,997 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 727 transitions. Word has length 377 [2020-11-07 02:01:20,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:20,998 INFO L481 AbstractCegarLoop]: Abstraction has 690 states and 727 transitions. [2020-11-07 02:01:20,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-07 02:01:20,998 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 727 transitions. [2020-11-07 02:01:20,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-11-07 02:01:21,000 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:21,000 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:21,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-11-07 02:01:21,000 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:21,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1877160276, now seen corresponding path program 34 times [2020-11-07 02:01:21,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:21,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062920214] [2020-11-07 02:01:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:21,081 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:21,082 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:23,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:23,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062920214] [2020-11-07 02:01:23,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:23,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-11-07 02:01:23,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624072749] [2020-11-07 02:01:23,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-11-07 02:01:23,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:23,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-11-07 02:01:23,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=2249, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 02:01:23,293 INFO L87 Difference]: Start difference. First operand 690 states and 727 transitions. Second operand 51 states. [2020-11-07 02:01:29,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:29,928 INFO L93 Difference]: Finished difference Result 932 states and 985 transitions. [2020-11-07 02:01:29,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-07 02:01:29,930 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 377 [2020-11-07 02:01:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:29,935 INFO L225 Difference]: With dead ends: 932 [2020-11-07 02:01:29,935 INFO L226 Difference]: Without dead ends: 924 [2020-11-07 02:01:29,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3367 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2706, Invalid=11814, Unknown=0, NotChecked=0, Total=14520 [2020-11-07 02:01:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2020-11-07 02:01:30,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 879. [2020-11-07 02:01:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-11-07 02:01:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 932 transitions. [2020-11-07 02:01:30,467 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 932 transitions. Word has length 377 [2020-11-07 02:01:30,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:30,468 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 932 transitions. [2020-11-07 02:01:30,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-11-07 02:01:30,468 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 932 transitions. [2020-11-07 02:01:30,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-11-07 02:01:30,470 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:30,470 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:30,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-11-07 02:01:30,470 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:30,471 INFO L82 PathProgramCache]: Analyzing trace with hash -859762164, now seen corresponding path program 35 times [2020-11-07 02:01:30,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:30,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615802031] [2020-11-07 02:01:30,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:30,555 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:30,556 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:32,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:32,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615802031] [2020-11-07 02:01:32,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:32,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-11-07 02:01:32,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477807688] [2020-11-07 02:01:32,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-07 02:01:32,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:32,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-07 02:01:32,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2357, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 02:01:32,638 INFO L87 Difference]: Start difference. First operand 879 states and 932 transitions. Second operand 52 states. [2020-11-07 02:01:45,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:45,653 INFO L93 Difference]: Finished difference Result 2129 states and 2269 transitions. [2020-11-07 02:01:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-11-07 02:01:45,654 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 389 [2020-11-07 02:01:45,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:45,657 INFO L225 Difference]: With dead ends: 2129 [2020-11-07 02:01:45,658 INFO L226 Difference]: Without dead ends: 441 [2020-11-07 02:01:45,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10768 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=4844, Invalid=29938, Unknown=0, NotChecked=0, Total=34782 [2020-11-07 02:01:45,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-11-07 02:01:45,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 438. [2020-11-07 02:01:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-11-07 02:01:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 457 transitions. [2020-11-07 02:01:45,827 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 457 transitions. Word has length 389 [2020-11-07 02:01:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:45,827 INFO L481 AbstractCegarLoop]: Abstraction has 438 states and 457 transitions. [2020-11-07 02:01:45,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-07 02:01:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 457 transitions. [2020-11-07 02:01:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-11-07 02:01:45,829 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:45,829 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:45,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-11-07 02:01:45,829 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:45,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:45,830 INFO L82 PathProgramCache]: Analyzing trace with hash -623033996, now seen corresponding path program 36 times [2020-11-07 02:01:45,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:45,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655254523] [2020-11-07 02:01:45,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:45,918 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:45,920 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:47,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:47,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655254523] [2020-11-07 02:01:47,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:47,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-11-07 02:01:47,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291440748] [2020-11-07 02:01:47,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-07 02:01:47,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:47,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-07 02:01:47,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2033, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 02:01:47,944 INFO L87 Difference]: Start difference. First operand 438 states and 457 transitions. Second operand 49 states. [2020-11-07 02:01:55,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:55,803 INFO L93 Difference]: Finished difference Result 1603 states and 1706 transitions. [2020-11-07 02:01:55,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-11-07 02:01:55,805 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 389 [2020-11-07 02:01:55,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:55,809 INFO L225 Difference]: With dead ends: 1603 [2020-11-07 02:01:55,809 INFO L226 Difference]: Without dead ends: 1355 [2020-11-07 02:01:55,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4375 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2651, Invalid=14119, Unknown=0, NotChecked=0, Total=16770 [2020-11-07 02:01:55,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-11-07 02:01:56,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 650. [2020-11-07 02:01:56,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2020-11-07 02:01:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 684 transitions. [2020-11-07 02:01:56,130 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 684 transitions. Word has length 389 [2020-11-07 02:01:56,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:56,130 INFO L481 AbstractCegarLoop]: Abstraction has 650 states and 684 transitions. [2020-11-07 02:01:56,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-07 02:01:56,130 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 684 transitions. [2020-11-07 02:01:56,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-11-07 02:01:56,132 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:56,132 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:56,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-11-07 02:01:56,133 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:56,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:56,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2094802140, now seen corresponding path program 37 times [2020-11-07 02:01:56,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:56,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895799890] [2020-11-07 02:01:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:56,220 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:56,222 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:58,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:58,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895799890] [2020-11-07 02:01:58,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:58,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-11-07 02:01:58,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598895808] [2020-11-07 02:01:58,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-11-07 02:01:58,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:58,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-11-07 02:01:58,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 02:01:58,446 INFO L87 Difference]: Start difference. First operand 650 states and 684 transitions. Second operand 51 states. [2020-11-07 02:02:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:02:05,111 INFO L93 Difference]: Finished difference Result 1057 states and 1123 transitions. [2020-11-07 02:02:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-11-07 02:02:05,112 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 395 [2020-11-07 02:02:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:02:05,116 INFO L225 Difference]: With dead ends: 1057 [2020-11-07 02:02:05,116 INFO L226 Difference]: Without dead ends: 856 [2020-11-07 02:02:05,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5677 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3698, Invalid=15484, Unknown=0, NotChecked=0, Total=19182 [2020-11-07 02:02:05,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2020-11-07 02:02:05,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 656. [2020-11-07 02:02:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-11-07 02:02:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 690 transitions. [2020-11-07 02:02:05,434 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 690 transitions. Word has length 395 [2020-11-07 02:02:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:02:05,434 INFO L481 AbstractCegarLoop]: Abstraction has 656 states and 690 transitions. [2020-11-07 02:02:05,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-11-07 02:02:05,434 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 690 transitions. [2020-11-07 02:02:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-11-07 02:02:05,437 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:02:05,438 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:02:05,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-11-07 02:02:05,438 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:02:05,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:02:05,438 INFO L82 PathProgramCache]: Analyzing trace with hash -525903812, now seen corresponding path program 38 times [2020-11-07 02:02:05,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:02:05,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060689444] [2020-11-07 02:02:05,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:02:05,545 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:02:05,546 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:02:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:07,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:02:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:02:07,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060689444] [2020-11-07 02:02:07,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:02:07,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-11-07 02:02:07,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051873512] [2020-11-07 02:02:07,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-07 02:02:07,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:02:07,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-07 02:02:07,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2423, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 02:02:07,956 INFO L87 Difference]: Start difference. First operand 656 states and 690 transitions. Second operand 53 states. [2020-11-07 02:02:21,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:02:21,944 INFO L93 Difference]: Finished difference Result 1940 states and 2066 transitions. [2020-11-07 02:02:21,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-11-07 02:02:21,946 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 401 [2020-11-07 02:02:21,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:02:21,949 INFO L225 Difference]: With dead ends: 1940 [2020-11-07 02:02:21,949 INFO L226 Difference]: Without dead ends: 1692 [2020-11-07 02:02:21,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9936 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=4545, Invalid=28035, Unknown=0, NotChecked=0, Total=32580 [2020-11-07 02:02:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2020-11-07 02:02:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 752. [2020-11-07 02:02:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2020-11-07 02:02:22,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 793 transitions. [2020-11-07 02:02:22,435 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 793 transitions. Word has length 401 [2020-11-07 02:02:22,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:02:22,435 INFO L481 AbstractCegarLoop]: Abstraction has 752 states and 793 transitions. [2020-11-07 02:02:22,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-07 02:02:22,435 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 793 transitions. [2020-11-07 02:02:22,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-11-07 02:02:22,438 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:02:22,438 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:02:22,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-11-07 02:02:22,438 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:02:22,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:02:22,439 INFO L82 PathProgramCache]: Analyzing trace with hash -323706972, now seen corresponding path program 39 times [2020-11-07 02:02:22,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:02:22,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360807619] [2020-11-07 02:02:22,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:02:22,535 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:02:22,537 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:02:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:25,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:02:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:02:25,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360807619] [2020-11-07 02:02:25,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:02:25,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2020-11-07 02:02:25,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15418124] [2020-11-07 02:02:25,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-11-07 02:02:25,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:02:25,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-11-07 02:02:25,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=2619, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 02:02:25,327 INFO L87 Difference]: Start difference. First operand 752 states and 793 transitions. Second operand 55 states. [2020-11-07 02:02:33,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:02:33,435 INFO L93 Difference]: Finished difference Result 1010 states and 1068 transitions. [2020-11-07 02:02:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-11-07 02:02:33,436 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 401 [2020-11-07 02:02:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:02:33,440 INFO L225 Difference]: With dead ends: 1010 [2020-11-07 02:02:33,440 INFO L226 Difference]: Without dead ends: 1002 [2020-11-07 02:02:33,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3980 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=3189, Invalid=13841, Unknown=0, NotChecked=0, Total=17030 [2020-11-07 02:02:33,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-11-07 02:02:34,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 953. [2020-11-07 02:02:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2020-11-07 02:02:34,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1011 transitions. [2020-11-07 02:02:34,100 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1011 transitions. Word has length 401 [2020-11-07 02:02:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:02:34,101 INFO L481 AbstractCegarLoop]: Abstraction has 953 states and 1011 transitions. [2020-11-07 02:02:34,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-11-07 02:02:34,101 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1011 transitions. [2020-11-07 02:02:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-11-07 02:02:34,103 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:02:34,104 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:02:34,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-11-07 02:02:34,104 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:02:34,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:02:34,104 INFO L82 PathProgramCache]: Analyzing trace with hash 542999300, now seen corresponding path program 40 times [2020-11-07 02:02:34,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:02:34,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114788571] [2020-11-07 02:02:34,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:02:34,212 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:02:34,213 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:02:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:36,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:02:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:02:37,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114788571] [2020-11-07 02:02:37,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:02:37,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-11-07 02:02:37,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890297273] [2020-11-07 02:02:37,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-07 02:02:37,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:02:37,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-07 02:02:37,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=2737, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 02:02:37,083 INFO L87 Difference]: Start difference. First operand 953 states and 1011 transitions. Second operand 56 states. [2020-11-07 02:02:55,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:02:55,784 INFO L93 Difference]: Finished difference Result 2409 states and 2570 transitions. [2020-11-07 02:02:55,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-11-07 02:02:55,787 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 413 [2020-11-07 02:02:55,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:02:55,789 INFO L225 Difference]: With dead ends: 2409 [2020-11-07 02:02:55,789 INFO L226 Difference]: Without dead ends: 465 [2020-11-07 02:02:55,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13073 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=5775, Invalid=36045, Unknown=0, NotChecked=0, Total=41820 [2020-11-07 02:02:55,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-11-07 02:02:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 462. [2020-11-07 02:02:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-11-07 02:02:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 482 transitions. [2020-11-07 02:02:56,033 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 482 transitions. Word has length 413 [2020-11-07 02:02:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:02:56,034 INFO L481 AbstractCegarLoop]: Abstraction has 462 states and 482 transitions. [2020-11-07 02:02:56,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-07 02:02:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 482 transitions. [2020-11-07 02:02:56,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-11-07 02:02:56,035 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:02:56,036 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:02:56,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-11-07 02:02:56,036 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:02:56,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:02:56,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1859428756, now seen corresponding path program 41 times [2020-11-07 02:02:56,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:02:56,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954070450] [2020-11-07 02:02:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:02:56,159 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:02:56,160 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:02:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:58,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:02:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:02:58,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954070450] [2020-11-07 02:02:58,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:02:58,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-11-07 02:02:58,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781459248] [2020-11-07 02:02:58,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-07 02:02:58,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:02:58,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-07 02:02:58,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 02:02:58,973 INFO L87 Difference]: Start difference. First operand 462 states and 482 transitions. Second operand 53 states. [2020-11-07 02:03:10,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:03:10,435 INFO L93 Difference]: Finished difference Result 1797 states and 1914 transitions. [2020-11-07 02:03:10,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-11-07 02:03:10,438 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 413 [2020-11-07 02:03:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:03:10,442 INFO L225 Difference]: With dead ends: 1797 [2020-11-07 02:03:10,442 INFO L226 Difference]: Without dead ends: 1528 [2020-11-07 02:03:10,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5273 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=3150, Invalid=16872, Unknown=0, NotChecked=0, Total=20022 [2020-11-07 02:03:10,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2020-11-07 02:03:10,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 700. [2020-11-07 02:03:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2020-11-07 02:03:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 737 transitions. [2020-11-07 02:03:10,845 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 737 transitions. Word has length 413 [2020-11-07 02:03:10,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:03:10,846 INFO L481 AbstractCegarLoop]: Abstraction has 700 states and 737 transitions. [2020-11-07 02:03:10,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-07 02:03:10,846 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 737 transitions. [2020-11-07 02:03:10,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-11-07 02:03:10,848 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:03:10,848 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:03:10,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-11-07 02:03:10,849 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:03:10,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:03:10,849 INFO L82 PathProgramCache]: Analyzing trace with hash 554731988, now seen corresponding path program 42 times [2020-11-07 02:03:10,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:03:10,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44238000] [2020-11-07 02:03:10,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:03:10,991 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:03:10,992 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:03:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:13,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:03:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:03:14,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44238000] [2020-11-07 02:03:14,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:03:14,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2020-11-07 02:03:14,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478644859] [2020-11-07 02:03:14,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-11-07 02:03:14,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:03:14,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-11-07 02:03:14,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2549, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 02:03:14,073 INFO L87 Difference]: Start difference. First operand 700 states and 737 transitions. Second operand 55 states. [2020-11-07 02:03:22,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:03:22,726 INFO L93 Difference]: Finished difference Result 1131 states and 1202 transitions. [2020-11-07 02:03:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-11-07 02:03:22,728 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 419 [2020-11-07 02:03:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:03:22,731 INFO L225 Difference]: With dead ends: 1131 [2020-11-07 02:03:22,731 INFO L226 Difference]: Without dead ends: 918 [2020-11-07 02:03:22,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6774 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=4363, Invalid=18287, Unknown=0, NotChecked=0, Total=22650 [2020-11-07 02:03:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2020-11-07 02:03:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 706. [2020-11-07 02:03:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-11-07 02:03:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 743 transitions. [2020-11-07 02:03:23,153 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 743 transitions. Word has length 419 [2020-11-07 02:03:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:03:23,153 INFO L481 AbstractCegarLoop]: Abstraction has 706 states and 743 transitions. [2020-11-07 02:03:23,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-11-07 02:03:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 743 transitions. [2020-11-07 02:03:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-11-07 02:03:23,156 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:03:23,157 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:03:23,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-11-07 02:03:23,157 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:03:23,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:03:23,157 INFO L82 PathProgramCache]: Analyzing trace with hash 918667572, now seen corresponding path program 43 times [2020-11-07 02:03:23,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:03:23,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354293413] [2020-11-07 02:03:23,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:03:23,272 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:03:23,273 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:03:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:26,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:03:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:03:26,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354293413] [2020-11-07 02:03:26,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:03:26,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2020-11-07 02:03:26,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263193504] [2020-11-07 02:03:26,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-11-07 02:03:26,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:03:26,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-11-07 02:03:26,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2807, Unknown=0, NotChecked=0, Total=3192 [2020-11-07 02:03:26,552 INFO L87 Difference]: Start difference. First operand 706 states and 743 transitions. Second operand 57 states. [2020-11-07 02:03:46,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:03:46,312 INFO L93 Difference]: Finished difference Result 2173 states and 2316 transitions. [2020-11-07 02:03:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2020-11-07 02:03:46,315 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 425 [2020-11-07 02:03:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:03:46,320 INFO L225 Difference]: With dead ends: 2173 [2020-11-07 02:03:46,320 INFO L226 Difference]: Without dead ends: 1904 [2020-11-07 02:03:46,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11869 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=5364, Invalid=33248, Unknown=0, NotChecked=0, Total=38612 [2020-11-07 02:03:46,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-11-07 02:03:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 814. [2020-11-07 02:03:46,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2020-11-07 02:03:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 859 transitions. [2020-11-07 02:03:46,945 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 859 transitions. Word has length 425 [2020-11-07 02:03:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:03:46,945 INFO L481 AbstractCegarLoop]: Abstraction has 814 states and 859 transitions. [2020-11-07 02:03:46,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-11-07 02:03:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 859 transitions. [2020-11-07 02:03:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-11-07 02:03:46,947 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:03:46,947 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:03:46,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-11-07 02:03:46,948 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:03:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:03:46,948 INFO L82 PathProgramCache]: Analyzing trace with hash 341226652, now seen corresponding path program 44 times [2020-11-07 02:03:46,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:03:46,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833794291] [2020-11-07 02:03:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:03:47,063 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:03:47,064 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:03:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:50,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:03:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:03:50,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833794291] [2020-11-07 02:03:50,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:03:50,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2020-11-07 02:03:50,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141969168] [2020-11-07 02:03:50,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-11-07 02:03:50,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:03:50,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-11-07 02:03:50,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=3017, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 02:03:50,916 INFO L87 Difference]: Start difference. First operand 814 states and 859 transitions. Second operand 59 states. [2020-11-07 02:04:02,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:04:02,493 INFO L93 Difference]: Finished difference Result 1088 states and 1151 transitions. [2020-11-07 02:04:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-11-07 02:04:02,495 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 425 [2020-11-07 02:04:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:04:02,499 INFO L225 Difference]: With dead ends: 1088 [2020-11-07 02:04:02,499 INFO L226 Difference]: Without dead ends: 1080 [2020-11-07 02:04:02,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4644 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=3712, Invalid=16028, Unknown=0, NotChecked=0, Total=19740 [2020-11-07 02:04:02,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2020-11-07 02:04:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1027. [2020-11-07 02:04:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1027 states. [2020-11-07 02:04:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1090 transitions. [2020-11-07 02:04:03,326 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1090 transitions. Word has length 425 [2020-11-07 02:04:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:04:03,326 INFO L481 AbstractCegarLoop]: Abstraction has 1027 states and 1090 transitions. [2020-11-07 02:04:03,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-11-07 02:04:03,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1090 transitions. [2020-11-07 02:04:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-11-07 02:04:03,329 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:04:03,329 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:04:03,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-11-07 02:04:03,330 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:04:03,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:04:03,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1439549444, now seen corresponding path program 45 times [2020-11-07 02:04:03,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:04:03,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092288548] [2020-11-07 02:04:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:04:03,471 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:04:03,473 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:04:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:07,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:04:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:04:07,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092288548] [2020-11-07 02:04:07,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:04:07,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-11-07 02:04:07,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631905665] [2020-11-07 02:04:07,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-11-07 02:04:07,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:04:07,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-11-07 02:04:07,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=3145, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 02:04:07,475 INFO L87 Difference]: Start difference. First operand 1027 states and 1090 transitions. Second operand 60 states. [2020-11-07 02:04:33,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:04:33,772 INFO L93 Difference]: Finished difference Result 2701 states and 2884 transitions. [2020-11-07 02:04:33,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-11-07 02:04:33,776 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 437 [2020-11-07 02:04:33,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:04:33,777 INFO L225 Difference]: With dead ends: 2701 [2020-11-07 02:04:33,778 INFO L226 Difference]: Without dead ends: 489 [2020-11-07 02:04:33,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15602 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=6787, Invalid=42719, Unknown=0, NotChecked=0, Total=49506 [2020-11-07 02:04:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-11-07 02:04:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 486. [2020-11-07 02:04:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2020-11-07 02:04:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 507 transitions. [2020-11-07 02:04:34,047 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 507 transitions. Word has length 437 [2020-11-07 02:04:34,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:04:34,048 INFO L481 AbstractCegarLoop]: Abstraction has 486 states and 507 transitions. [2020-11-07 02:04:34,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-11-07 02:04:34,048 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 507 transitions. [2020-11-07 02:04:34,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-11-07 02:04:34,050 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:04:34,050 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:04:34,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-11-07 02:04:34,050 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:04:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:04:34,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1589788828, now seen corresponding path program 46 times [2020-11-07 02:04:34,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:04:34,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514500794] [2020-11-07 02:04:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:04:34,194 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:04:34,195 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:04:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:37,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:04:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:04:38,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514500794] [2020-11-07 02:04:38,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:04:38,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2020-11-07 02:04:38,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35581772] [2020-11-07 02:04:38,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-11-07 02:04:38,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:04:38,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-11-07 02:04:38,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=2765, Unknown=0, NotChecked=0, Total=3192 [2020-11-07 02:04:38,042 INFO L87 Difference]: Start difference. First operand 486 states and 507 transitions. Second operand 57 states. [2020-11-07 02:04:53,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:04:53,831 INFO L93 Difference]: Finished difference Result 2003 states and 2135 transitions. [2020-11-07 02:04:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-11-07 02:04:53,835 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 437 [2020-11-07 02:04:53,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:04:53,839 INFO L225 Difference]: With dead ends: 2003 [2020-11-07 02:04:53,839 INFO L226 Difference]: Without dead ends: 1713 [2020-11-07 02:04:53,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6255 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=3692, Invalid=19870, Unknown=0, NotChecked=0, Total=23562 [2020-11-07 02:04:53,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2020-11-07 02:04:54,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 750. [2020-11-07 02:04:54,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2020-11-07 02:04:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 790 transitions. [2020-11-07 02:04:54,420 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 790 transitions. Word has length 437 [2020-11-07 02:04:54,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:04:54,420 INFO L481 AbstractCegarLoop]: Abstraction has 750 states and 790 transitions. [2020-11-07 02:04:54,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-11-07 02:04:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 790 transitions. [2020-11-07 02:04:54,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2020-11-07 02:04:54,423 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:04:54,423 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:04:54,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-11-07 02:04:54,424 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:04:54,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:04:54,424 INFO L82 PathProgramCache]: Analyzing trace with hash -491703604, now seen corresponding path program 47 times [2020-11-07 02:04:54,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:04:54,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467843302] [2020-11-07 02:04:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:04:54,575 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:04:54,577 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:04:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:58,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:04:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:04:58,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467843302] [2020-11-07 02:04:58,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:04:58,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2020-11-07 02:04:58,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135351009] [2020-11-07 02:04:58,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-11-07 02:04:58,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:04:58,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-11-07 02:04:58,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2941, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 02:04:58,937 INFO L87 Difference]: Start difference. First operand 750 states and 790 transitions. Second operand 59 states. [2020-11-07 02:05:12,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:12,402 INFO L93 Difference]: Finished difference Result 1205 states and 1281 transitions. [2020-11-07 02:05:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-11-07 02:05:12,405 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 443 [2020-11-07 02:05:12,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:12,408 INFO L225 Difference]: With dead ends: 1205 [2020-11-07 02:05:12,408 INFO L226 Difference]: Without dead ends: 980 [2020-11-07 02:05:12,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7968 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=5083, Invalid=21323, Unknown=0, NotChecked=0, Total=26406 [2020-11-07 02:05:12,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-11-07 02:05:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 756. [2020-11-07 02:05:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 756 states. [2020-11-07 02:05:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 796 transitions. [2020-11-07 02:05:12,902 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 796 transitions. Word has length 443 [2020-11-07 02:05:12,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:12,903 INFO L481 AbstractCegarLoop]: Abstraction has 756 states and 796 transitions. [2020-11-07 02:05:12,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-11-07 02:05:12,903 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 796 transitions. [2020-11-07 02:05:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-11-07 02:05:12,905 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:12,906 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:05:12,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-11-07 02:05:12,906 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:12,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:12,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1302696404, now seen corresponding path program 48 times [2020-11-07 02:05:12,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:12,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730844195] [2020-11-07 02:05:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:13,060 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:05:13,061 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:17,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:05:17,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730844195] [2020-11-07 02:05:17,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:17,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2020-11-07 02:05:17,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484119574] [2020-11-07 02:05:17,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-11-07 02:05:17,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:17,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-11-07 02:05:17,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=3219, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 02:05:17,759 INFO L87 Difference]: Start difference. First operand 756 states and 796 transitions. Second operand 61 states. [2020-11-07 02:05:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:46,379 INFO L93 Difference]: Finished difference Result 2418 states and 2579 transitions. [2020-11-07 02:05:46,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2020-11-07 02:05:46,384 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 449 [2020-11-07 02:05:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:46,389 INFO L225 Difference]: With dead ends: 2418 [2020-11-07 02:05:46,390 INFO L226 Difference]: Without dead ends: 2128 [2020-11-07 02:05:46,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13974 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=6251, Invalid=38905, Unknown=0, NotChecked=0, Total=45156 [2020-11-07 02:05:46,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2020-11-07 02:05:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 876. [2020-11-07 02:05:47,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 876 states. [2020-11-07 02:05:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 925 transitions. [2020-11-07 02:05:47,246 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 925 transitions. Word has length 449 [2020-11-07 02:05:47,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:47,246 INFO L481 AbstractCegarLoop]: Abstraction has 876 states and 925 transitions. [2020-11-07 02:05:47,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-11-07 02:05:47,246 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 925 transitions. [2020-11-07 02:05:47,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-11-07 02:05:47,249 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:47,249 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:05:47,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-11-07 02:05:47,250 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:47,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:47,250 INFO L82 PathProgramCache]: Analyzing trace with hash 964890004, now seen corresponding path program 49 times [2020-11-07 02:05:47,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:47,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083823997] [2020-11-07 02:05:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:47,416 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:05:47,418 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:52,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:05:52,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083823997] [2020-11-07 02:05:52,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:52,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2020-11-07 02:05:52,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587960504] [2020-11-07 02:05:52,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-07 02:05:52,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:52,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-07 02:05:52,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=3443, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 02:05:52,952 INFO L87 Difference]: Start difference. First operand 876 states and 925 transitions. Second operand 63 states. [2020-11-07 02:06:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:09,299 INFO L93 Difference]: Finished difference Result 1166 states and 1234 transitions. [2020-11-07 02:06:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-11-07 02:06:09,303 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 449 [2020-11-07 02:06:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:09,307 INFO L225 Difference]: With dead ends: 1166 [2020-11-07 02:06:09,307 INFO L226 Difference]: Without dead ends: 1158 [2020-11-07 02:06:09,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5359 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=4275, Invalid=18375, Unknown=0, NotChecked=0, Total=22650 [2020-11-07 02:06:09,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2020-11-07 02:06:10,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1101. [2020-11-07 02:06:10,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1101 states. [2020-11-07 02:06:10,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1169 transitions. [2020-11-07 02:06:10,430 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1169 transitions. Word has length 449 [2020-11-07 02:06:10,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:10,430 INFO L481 AbstractCegarLoop]: Abstraction has 1101 states and 1169 transitions. [2020-11-07 02:06:10,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-07 02:06:10,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1169 transitions. [2020-11-07 02:06:10,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-11-07 02:06:10,433 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:10,434 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:06:10,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-11-07 02:06:10,434 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:10,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:10,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1581199604, now seen corresponding path program 50 times [2020-11-07 02:06:10,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:10,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006250566] [2020-11-07 02:06:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:10,605 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:06:10,606 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:06:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:16,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:06:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:06:16,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006250566] [2020-11-07 02:06:16,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:06:16,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-11-07 02:06:16,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515084380] [2020-11-07 02:06:16,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-11-07 02:06:16,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:06:16,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-11-07 02:06:16,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=3581, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 02:06:16,243 INFO L87 Difference]: Start difference. First operand 1101 states and 1169 transitions. Second operand 64 states. [2020-11-07 02:06:54,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:54,739 INFO L93 Difference]: Finished difference Result 3005 states and 3211 transitions. [2020-11-07 02:06:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2020-11-07 02:06:54,743 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 461 [2020-11-07 02:06:54,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:54,748 INFO L225 Difference]: With dead ends: 3005 [2020-11-07 02:06:54,748 INFO L226 Difference]: Without dead ends: 513 [2020-11-07 02:06:54,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18355 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=7880, Invalid=49960, Unknown=0, NotChecked=0, Total=57840 [2020-11-07 02:06:54,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2020-11-07 02:06:55,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 510. [2020-11-07 02:06:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510 states. [2020-11-07 02:06:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 532 transitions. [2020-11-07 02:06:55,147 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 532 transitions. Word has length 461 [2020-11-07 02:06:55,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:55,148 INFO L481 AbstractCegarLoop]: Abstraction has 510 states and 532 transitions. [2020-11-07 02:06:55,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-11-07 02:06:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 532 transitions. [2020-11-07 02:06:55,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-11-07 02:06:55,150 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:55,150 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:06:55,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-11-07 02:06:55,150 INFO L429 AbstractCegarLoop]: === Iteration 78 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:55,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:55,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2106877020, now seen corresponding path program 51 times [2020-11-07 02:06:55,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:55,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265565244] [2020-11-07 02:06:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:55,349 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:06:55,350 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:06:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:00,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:07:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:07:01,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265565244] [2020-11-07 02:07:01,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:07:01,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2020-11-07 02:07:01,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729383060] [2020-11-07 02:07:01,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-11-07 02:07:01,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:07:01,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-11-07 02:07:01,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=3173, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 02:07:01,096 INFO L87 Difference]: Start difference. First operand 510 states and 532 transitions. Second operand 61 states. [2020-11-07 02:07:25,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:07:25,104 INFO L93 Difference]: Finished difference Result 2221 states and 2369 transitions. [2020-11-07 02:07:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2020-11-07 02:07:25,109 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 461 [2020-11-07 02:07:25,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:07:25,113 INFO L225 Difference]: With dead ends: 2221 [2020-11-07 02:07:25,113 INFO L226 Difference]: Without dead ends: 1910 [2020-11-07 02:07:25,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7321 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=4277, Invalid=23113, Unknown=0, NotChecked=0, Total=27390 [2020-11-07 02:07:25,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2020-11-07 02:07:25,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 800. [2020-11-07 02:07:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2020-11-07 02:07:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 843 transitions. [2020-11-07 02:07:25,728 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 843 transitions. Word has length 461 [2020-11-07 02:07:25,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:07:25,729 INFO L481 AbstractCegarLoop]: Abstraction has 800 states and 843 transitions. [2020-11-07 02:07:25,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-11-07 02:07:25,729 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 843 transitions. [2020-11-07 02:07:25,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-11-07 02:07:25,731 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:07:25,732 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:07:25,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-11-07 02:07:25,732 INFO L429 AbstractCegarLoop]: === Iteration 79 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:07:25,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:07:25,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1136779324, now seen corresponding path program 52 times [2020-11-07 02:07:25,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:07:25,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444891208] [2020-11-07 02:07:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:07:25,927 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:07:25,929 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:07:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:32,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:07:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:07:32,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444891208] [2020-11-07 02:07:32,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:07:32,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2020-11-07 02:07:32,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303354013] [2020-11-07 02:07:32,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-07 02:07:32,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:07:32,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-07 02:07:32,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=3361, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 02:07:32,359 INFO L87 Difference]: Start difference. First operand 800 states and 843 transitions. Second operand 63 states. [2020-11-07 02:07:50,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:07:50,997 INFO L93 Difference]: Finished difference Result 1279 states and 1360 transitions. [2020-11-07 02:07:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-11-07 02:07:51,002 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 467 [2020-11-07 02:07:51,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:07:51,005 INFO L225 Difference]: With dead ends: 1279 [2020-11-07 02:07:51,005 INFO L226 Difference]: Without dead ends: 1042 [2020-11-07 02:07:51,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9259 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=5858, Invalid=24592, Unknown=0, NotChecked=0, Total=30450 [2020-11-07 02:07:51,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2020-11-07 02:07:51,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 806. [2020-11-07 02:07:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2020-11-07 02:07:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 849 transitions. [2020-11-07 02:07:51,621 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 849 transitions. Word has length 467 [2020-11-07 02:07:51,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:07:51,622 INFO L481 AbstractCegarLoop]: Abstraction has 806 states and 849 transitions. [2020-11-07 02:07:51,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-07 02:07:51,622 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 849 transitions. [2020-11-07 02:07:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-11-07 02:07:51,625 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:07:51,625 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:07:51,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-11-07 02:07:51,625 INFO L429 AbstractCegarLoop]: === Iteration 80 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:07:51,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:07:51,626 INFO L82 PathProgramCache]: Analyzing trace with hash 99704612, now seen corresponding path program 53 times [2020-11-07 02:07:51,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:07:51,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253371511] [2020-11-07 02:07:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:07:51,824 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:07:51,826 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:07:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:58,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:07:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:07:58,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253371511] [2020-11-07 02:07:58,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:07:58,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2020-11-07 02:07:58,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679980358] [2020-11-07 02:07:58,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-11-07 02:07:58,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:07:58,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-11-07 02:07:58,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=3659, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 02:07:58,499 INFO L87 Difference]: Start difference. First operand 806 states and 849 transitions. Second operand 65 states. [2020-11-07 02:08:41,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:41,222 INFO L93 Difference]: Finished difference Result 2675 states and 2855 transitions. [2020-11-07 02:08:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2020-11-07 02:08:41,229 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 473 [2020-11-07 02:08:41,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:41,235 INFO L225 Difference]: With dead ends: 2675 [2020-11-07 02:08:41,235 INFO L226 Difference]: Without dead ends: 2364 [2020-11-07 02:08:41,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16251 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=7206, Invalid=45006, Unknown=0, NotChecked=0, Total=52212 [2020-11-07 02:08:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2020-11-07 02:08:42,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 938. [2020-11-07 02:08:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-11-07 02:08:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 991 transitions. [2020-11-07 02:08:42,423 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 991 transitions. Word has length 473 [2020-11-07 02:08:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:42,424 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 991 transitions. [2020-11-07 02:08:42,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-11-07 02:08:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 991 transitions. [2020-11-07 02:08:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-11-07 02:08:42,427 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:42,427 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:42,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-11-07 02:08:42,428 INFO L429 AbstractCegarLoop]: === Iteration 81 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:42,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:42,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1832495756, now seen corresponding path program 54 times [2020-11-07 02:08:42,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:42,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261491384] [2020-11-07 02:08:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:42,651 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:42,653 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:50,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:50,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261491384] [2020-11-07 02:08:50,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:50,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2020-11-07 02:08:50,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524939441] [2020-11-07 02:08:50,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-11-07 02:08:50,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:50,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-11-07 02:08:50,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=3897, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 02:08:50,343 INFO L87 Difference]: Start difference. First operand 938 states and 991 transitions. Second operand 67 states. [2020-11-07 02:09:14,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:14,554 INFO L93 Difference]: Finished difference Result 1244 states and 1317 transitions. [2020-11-07 02:09:14,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-11-07 02:09:14,559 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 473 [2020-11-07 02:09:14,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:14,562 INFO L225 Difference]: With dead ends: 1244 [2020-11-07 02:09:14,563 INFO L226 Difference]: Without dead ends: 1236 [2020-11-07 02:09:14,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6125 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=4878, Invalid=20882, Unknown=0, NotChecked=0, Total=25760 [2020-11-07 02:09:14,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2020-11-07 02:09:15,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1175. [2020-11-07 02:09:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1175 states. [2020-11-07 02:09:15,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1248 transitions. [2020-11-07 02:09:15,776 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1248 transitions. Word has length 473 [2020-11-07 02:09:15,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:15,776 INFO L481 AbstractCegarLoop]: Abstraction has 1175 states and 1248 transitions. [2020-11-07 02:09:15,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-11-07 02:09:15,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1248 transitions. [2020-11-07 02:09:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-11-07 02:09:15,779 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:15,779 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:09:15,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-11-07 02:09:15,780 INFO L429 AbstractCegarLoop]: === Iteration 82 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:15,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:15,780 INFO L82 PathProgramCache]: Analyzing trace with hash 788819436, now seen corresponding path program 55 times [2020-11-07 02:09:15,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:15,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582117969] [2020-11-07 02:09:15,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:15,970 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:09:15,972 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:22,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:09:22,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582117969] [2020-11-07 02:09:22,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:22,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-11-07 02:09:22,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726884284] [2020-11-07 02:09:22,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-11-07 02:09:22,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:22,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-11-07 02:09:22,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=4045, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 02:09:22,830 INFO L87 Difference]: Start difference. First operand 1175 states and 1248 transitions. Second operand 68 states. [2020-11-07 02:10:08,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:10:08,118 INFO L93 Difference]: Finished difference Result 3321 states and 3551 transitions. [2020-11-07 02:10:08,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2020-11-07 02:10:08,123 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 485 [2020-11-07 02:10:08,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:10:08,125 INFO L225 Difference]: With dead ends: 3321 [2020-11-07 02:10:08,125 INFO L226 Difference]: Without dead ends: 537 [2020-11-07 02:10:08,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21332 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=9054, Invalid=57768, Unknown=0, NotChecked=0, Total=66822 [2020-11-07 02:10:08,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2020-11-07 02:10:08,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 534. [2020-11-07 02:10:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-11-07 02:10:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 557 transitions. [2020-11-07 02:10:08,442 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 557 transitions. Word has length 485 [2020-11-07 02:10:08,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:10:08,443 INFO L481 AbstractCegarLoop]: Abstraction has 534 states and 557 transitions. [2020-11-07 02:10:08,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-11-07 02:10:08,443 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 557 transitions. [2020-11-07 02:10:08,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-11-07 02:10:08,445 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:10:08,445 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:10:08,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-11-07 02:10:08,446 INFO L429 AbstractCegarLoop]: === Iteration 83 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:10:08,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:10:08,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1221636780, now seen corresponding path program 56 times [2020-11-07 02:10:08,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:10:08,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078183590] [2020-11-07 02:10:08,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:10:08,638 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:10:08,640 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:10:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:14,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:10:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:10:15,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078183590] [2020-11-07 02:10:15,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:10:15,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2020-11-07 02:10:15,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847226333] [2020-11-07 02:10:15,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-11-07 02:10:15,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:10:15,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-11-07 02:10:15,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=3609, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 02:10:15,157 INFO L87 Difference]: Start difference. First operand 534 states and 557 transitions. Second operand 65 states. [2020-11-07 02:10:39,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:10:39,500 INFO L93 Difference]: Finished difference Result 2451 states and 2616 transitions. [2020-11-07 02:10:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-11-07 02:10:39,506 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 485 [2020-11-07 02:10:39,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:10:39,512 INFO L225 Difference]: With dead ends: 2451 [2020-11-07 02:10:39,512 INFO L226 Difference]: Without dead ends: 2119 [2020-11-07 02:10:39,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8471 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=4905, Invalid=26601, Unknown=0, NotChecked=0, Total=31506 [2020-11-07 02:10:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2020-11-07 02:10:40,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 850. [2020-11-07 02:10:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 850 states. [2020-11-07 02:10:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 896 transitions. [2020-11-07 02:10:40,473 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 896 transitions. Word has length 485 [2020-11-07 02:10:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:10:40,473 INFO L481 AbstractCegarLoop]: Abstraction has 850 states and 896 transitions. [2020-11-07 02:10:40,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-11-07 02:10:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 896 transitions. [2020-11-07 02:10:40,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-11-07 02:10:40,477 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:10:40,478 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:10:40,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-11-07 02:10:40,478 INFO L429 AbstractCegarLoop]: === Iteration 84 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:10:40,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:10:40,478 INFO L82 PathProgramCache]: Analyzing trace with hash -961064772, now seen corresponding path program 57 times [2020-11-07 02:10:40,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:10:40,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310724465] [2020-11-07 02:10:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:10:40,693 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:10:40,694 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:10:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat