/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/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:45:43,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:45:43,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:45:43,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 00:45:43,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 00:45:43,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 00:45:43,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 00:45:43,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 00:45:43,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 00:45:43,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 00:45:43,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 00:45:43,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 00:45:43,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:45:43,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:45:43,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:45:43,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:45:43,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:45:43,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:45:43,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:45:43,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:45:43,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:45:43,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:45:43,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:45:43,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:45:43,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 00:45:43,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 00:45:43,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 00:45:43,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 00:45:43,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 00:45:43,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 00:45:43,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 00:45:43,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 00:45:43,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 00:45:43,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 00:45:43,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 00:45:43,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 00:45:43,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 00:45:43,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 00:45:43,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:45:43,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:45:43,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:45:43,724 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 00:45:43,737 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:45:43,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:45:43,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:45:43,740 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:45:43,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:45:43,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:45:43,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:45:43,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:45:43,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:45:43,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:45:43,741 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:45:43,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:45:43,742 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:45:43,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:45:43,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:45:43,743 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:45:43,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:45:43,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:45:43,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:45:43,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:45:43,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:45:43,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:45:43,744 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:45:44,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:45:44,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:45:44,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:45:44,240 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:45:44,241 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:45:44,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-11-07 00:45:44,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33b1beb65/6127f84af2a6493285e50c88da079ea5/FLAG551b0c6e2 [2020-11-07 00:45:45,060 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:45:45,062 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2020-11-07 00:45:45,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33b1beb65/6127f84af2a6493285e50c88da079ea5/FLAG551b0c6e2 [2020-11-07 00:45:45,371 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33b1beb65/6127f84af2a6493285e50c88da079ea5 [2020-11-07 00:45:45,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:45:45,383 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:45:45,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:45:45,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:45:45,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:45:45,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:45:45" (1/1) ... [2020-11-07 00:45:45,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db8b721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:45:45, skipping insertion in model container [2020-11-07 00:45:45,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:45:45" (1/1) ... [2020-11-07 00:45:45,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:45:45,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:45:45,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:45:45,621 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:45:45,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:45:45,674 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:45:45,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:45:45 WrapperNode [2020-11-07 00:45:45,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:45:45,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:45:45,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:45:45,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:45:45,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:45:45" (1/1) ... [2020-11-07 00:45:45,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:45:45" (1/1) ... [2020-11-07 00:45:45,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:45:45" (1/1) ... [2020-11-07 00:45:45,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:45:45" (1/1) ... [2020-11-07 00:45:45,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:45:45" (1/1) ... [2020-11-07 00:45:45,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:45:45" (1/1) ... [2020-11-07 00:45:45,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:45:45" (1/1) ... [2020-11-07 00:45:45,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:45:45,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:45:45,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:45:45,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:45:45,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:45:45" (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 00:45:45,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:45:45,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:45:45,813 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:45:45,813 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:45:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:45:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:45:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:45:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:45:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:45:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:45:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:45:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:45:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:45:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:45:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:45:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:45:46,685 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:45:46,686 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 00:45:46,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:45:46 BoogieIcfgContainer [2020-11-07 00:45:46,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:45:46,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:45:46,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:45:46,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:45:46,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:45:45" (1/3) ... [2020-11-07 00:45:46,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d294ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:45:46, skipping insertion in model container [2020-11-07 00:45:46,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:45:45" (2/3) ... [2020-11-07 00:45:46,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d294ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:45:46, skipping insertion in model container [2020-11-07 00:45:46,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:45:46" (3/3) ... [2020-11-07 00:45:46,698 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-11-07 00:45:46,714 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:45:46,718 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:45:46,731 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:45:46,760 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:45:46,761 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:45:46,761 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:45:46,761 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:45:46,761 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:45:46,762 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:45:46,762 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:45:46,762 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:45:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-11-07 00:45:46,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-07 00:45:46,799 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:45:46,800 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, 1, 1, 1, 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 00:45:46,801 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:45:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:45:46,817 INFO L82 PathProgramCache]: Analyzing trace with hash -29840839, now seen corresponding path program 1 times [2020-11-07 00:45:46,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:45:46,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102700099] [2020-11-07 00:45:46,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:45:46,945 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:45:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:47,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:45:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:45:47,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102700099] [2020-11-07 00:45:47,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:45:47,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:45:47,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789643240] [2020-11-07 00:45:47,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:45:47,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:45:47,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:45:47,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:45:47,315 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 4 states. [2020-11-07 00:45:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:45:48,006 INFO L93 Difference]: Finished difference Result 291 states and 398 transitions. [2020-11-07 00:45:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:45:48,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-11-07 00:45:48,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:45:48,040 INFO L225 Difference]: With dead ends: 291 [2020-11-07 00:45:48,040 INFO L226 Difference]: Without dead ends: 200 [2020-11-07 00:45:48,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:45:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-11-07 00:45:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-11-07 00:45:48,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-11-07 00:45:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 261 transitions. [2020-11-07 00:45:48,156 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 261 transitions. Word has length 88 [2020-11-07 00:45:48,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:45:48,157 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 261 transitions. [2020-11-07 00:45:48,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:45:48,158 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 261 transitions. [2020-11-07 00:45:48,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-07 00:45:48,165 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:45:48,166 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, 1, 1, 1, 1, 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 00:45:48,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:45:48,166 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:45:48,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:45:48,168 INFO L82 PathProgramCache]: Analyzing trace with hash -282351705, now seen corresponding path program 1 times [2020-11-07 00:45:48,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:45:48,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252735455] [2020-11-07 00:45:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:45:48,182 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:45:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:48,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:45:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:48,376 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 00:45:48,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252735455] [2020-11-07 00:45:48,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:45:48,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:45:48,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517650798] [2020-11-07 00:45:48,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:45:48,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:45:48,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:45:48,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:45:48,380 INFO L87 Difference]: Start difference. First operand 199 states and 261 transitions. Second operand 4 states. [2020-11-07 00:45:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:45:48,788 INFO L93 Difference]: Finished difference Result 239 states and 320 transitions. [2020-11-07 00:45:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:45:48,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-11-07 00:45:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:45:48,792 INFO L225 Difference]: With dead ends: 239 [2020-11-07 00:45:48,792 INFO L226 Difference]: Without dead ends: 236 [2020-11-07 00:45:48,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:45:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-11-07 00:45:48,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 199. [2020-11-07 00:45:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-11-07 00:45:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 260 transitions. [2020-11-07 00:45:48,858 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 260 transitions. Word has length 89 [2020-11-07 00:45:48,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:45:48,859 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 260 transitions. [2020-11-07 00:45:48,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:45:48,859 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 260 transitions. [2020-11-07 00:45:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-07 00:45:48,861 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:45:48,861 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, 1, 1, 1, 1, 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 00:45:48,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:45:48,862 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:45:48,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:45:48,862 INFO L82 PathProgramCache]: Analyzing trace with hash -917522190, now seen corresponding path program 1 times [2020-11-07 00:45:48,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:45:48,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132040382] [2020-11-07 00:45:48,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:45:48,866 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:45:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:48,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:45:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:48,998 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 00:45:48,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132040382] [2020-11-07 00:45:48,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:45:48,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:45:48,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044769340] [2020-11-07 00:45:49,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:45:49,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:45:49,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:45:49,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:45:49,002 INFO L87 Difference]: Start difference. First operand 199 states and 260 transitions. Second operand 4 states. [2020-11-07 00:45:49,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:45:49,426 INFO L93 Difference]: Finished difference Result 475 states and 657 transitions. [2020-11-07 00:45:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:45:49,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-11-07 00:45:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:45:49,433 INFO L225 Difference]: With dead ends: 475 [2020-11-07 00:45:49,433 INFO L226 Difference]: Without dead ends: 333 [2020-11-07 00:45:49,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:45:49,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-11-07 00:45:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 332. [2020-11-07 00:45:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-11-07 00:45:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-11-07 00:45:49,544 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 449 transitions. Word has length 89 [2020-11-07 00:45:49,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:45:49,545 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-11-07 00:45:49,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:45:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 449 transitions. [2020-11-07 00:45:49,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-07 00:45:49,555 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:45:49,555 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, 1, 1, 1, 1, 1, 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 00:45:49,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:45:49,556 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:45:49,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:45:49,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2121163263, now seen corresponding path program 1 times [2020-11-07 00:45:49,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:45:49,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637454493] [2020-11-07 00:45:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:45:49,562 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:45:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:49,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:45:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:49,686 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 00:45:49,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637454493] [2020-11-07 00:45:49,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:45:49,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:45:49,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375667174] [2020-11-07 00:45:49,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:45:49,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:45:49,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:45:49,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:45:49,690 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 4 states. [2020-11-07 00:45:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:45:50,095 INFO L93 Difference]: Finished difference Result 404 states and 556 transitions. [2020-11-07 00:45:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:45:50,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-11-07 00:45:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:45:50,099 INFO L225 Difference]: With dead ends: 404 [2020-11-07 00:45:50,099 INFO L226 Difference]: Without dead ends: 401 [2020-11-07 00:45:50,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:45:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-11-07 00:45:50,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 332. [2020-11-07 00:45:50,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-11-07 00:45:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 447 transitions. [2020-11-07 00:45:50,211 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 447 transitions. Word has length 90 [2020-11-07 00:45:50,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:45:50,215 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 447 transitions. [2020-11-07 00:45:50,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:45:50,215 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 447 transitions. [2020-11-07 00:45:50,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-07 00:45:50,216 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:45:50,217 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, 1, 1, 1, 1, 1, 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 00:45:50,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:45:50,217 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:45:50,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:45:50,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1629138533, now seen corresponding path program 1 times [2020-11-07 00:45:50,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:45:50,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048276874] [2020-11-07 00:45:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:45:50,224 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:45:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:50,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:45:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:50,307 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 00:45:50,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048276874] [2020-11-07 00:45:50,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:45:50,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:45:50,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184060089] [2020-11-07 00:45:50,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:45:50,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:45:50,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:45:50,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:45:50,310 INFO L87 Difference]: Start difference. First operand 332 states and 447 transitions. Second operand 4 states. [2020-11-07 00:45:50,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:45:50,739 INFO L93 Difference]: Finished difference Result 868 states and 1210 transitions. [2020-11-07 00:45:50,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:45:50,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-11-07 00:45:50,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:45:50,744 INFO L225 Difference]: With dead ends: 868 [2020-11-07 00:45:50,745 INFO L226 Difference]: Without dead ends: 593 [2020-11-07 00:45:50,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:45:50,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-11-07 00:45:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 592. [2020-11-07 00:45:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-11-07 00:45:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 811 transitions. [2020-11-07 00:45:50,861 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 811 transitions. Word has length 90 [2020-11-07 00:45:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:45:50,862 INFO L481 AbstractCegarLoop]: Abstraction has 592 states and 811 transitions. [2020-11-07 00:45:50,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:45:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 811 transitions. [2020-11-07 00:45:50,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-07 00:45:50,863 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:45:50,864 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, 1, 1, 1, 1, 1, 1, 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 00:45:50,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:45:50,864 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:45:50,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:45:50,865 INFO L82 PathProgramCache]: Analyzing trace with hash -679272525, now seen corresponding path program 1 times [2020-11-07 00:45:50,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:45:50,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653933785] [2020-11-07 00:45:50,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:45:50,868 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:45:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:50,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:45:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:50,954 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 00:45:50,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653933785] [2020-11-07 00:45:50,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:45:50,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:45:50,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168193348] [2020-11-07 00:45:50,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:45:50,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:45:50,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:45:50,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:45:50,958 INFO L87 Difference]: Start difference. First operand 592 states and 811 transitions. Second operand 4 states. [2020-11-07 00:45:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:45:51,436 INFO L93 Difference]: Finished difference Result 724 states and 1006 transitions. [2020-11-07 00:45:51,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:45:51,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-11-07 00:45:51,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:45:51,446 INFO L225 Difference]: With dead ends: 724 [2020-11-07 00:45:51,446 INFO L226 Difference]: Without dead ends: 721 [2020-11-07 00:45:51,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:45:51,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2020-11-07 00:45:51,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 592. [2020-11-07 00:45:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-11-07 00:45:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 807 transitions. [2020-11-07 00:45:51,561 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 807 transitions. Word has length 91 [2020-11-07 00:45:51,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:45:51,562 INFO L481 AbstractCegarLoop]: Abstraction has 592 states and 807 transitions. [2020-11-07 00:45:51,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:45:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 807 transitions. [2020-11-07 00:45:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-07 00:45:51,564 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:45:51,564 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, 1, 1, 1, 1, 1, 1, 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 00:45:51,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:45:51,564 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:45:51,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:45:51,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1028746146, now seen corresponding path program 1 times [2020-11-07 00:45:51,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:45:51,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838095282] [2020-11-07 00:45:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:45:51,568 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:45:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:51,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:45:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:51,653 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 00:45:51,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838095282] [2020-11-07 00:45:51,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:45:51,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:45:51,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248069257] [2020-11-07 00:45:51,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:45:51,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:45:51,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:45:51,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:45:51,656 INFO L87 Difference]: Start difference. First operand 592 states and 807 transitions. Second operand 4 states. [2020-11-07 00:45:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:45:52,210 INFO L93 Difference]: Finished difference Result 1636 states and 2274 transitions. [2020-11-07 00:45:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:45:52,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-11-07 00:45:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:45:52,217 INFO L225 Difference]: With dead ends: 1636 [2020-11-07 00:45:52,218 INFO L226 Difference]: Without dead ends: 1101 [2020-11-07 00:45:52,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:45:52,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-11-07 00:45:52,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1100. [2020-11-07 00:45:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1100 states. [2020-11-07 00:45:52,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1507 transitions. [2020-11-07 00:45:52,411 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1507 transitions. Word has length 91 [2020-11-07 00:45:52,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:45:52,411 INFO L481 AbstractCegarLoop]: Abstraction has 1100 states and 1507 transitions. [2020-11-07 00:45:52,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:45:52,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1507 transitions. [2020-11-07 00:45:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-07 00:45:52,413 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:45:52,414 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, 1, 1, 1, 1, 1, 1, 1, 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 00:45:52,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 00:45:52,414 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:45:52,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:45:52,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1818781039, now seen corresponding path program 1 times [2020-11-07 00:45:52,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:45:52,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958742824] [2020-11-07 00:45:52,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:45:52,418 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:45:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:52,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:45:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:52,494 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 00:45:52,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958742824] [2020-11-07 00:45:52,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:45:52,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:45:52,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875349350] [2020-11-07 00:45:52,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:45:52,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:45:52,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:45:52,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:45:52,498 INFO L87 Difference]: Start difference. First operand 1100 states and 1507 transitions. Second operand 4 states. [2020-11-07 00:45:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:45:53,210 INFO L93 Difference]: Finished difference Result 3136 states and 4342 transitions. [2020-11-07 00:45:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:45:53,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2020-11-07 00:45:53,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:45:53,222 INFO L225 Difference]: With dead ends: 3136 [2020-11-07 00:45:53,223 INFO L226 Difference]: Without dead ends: 2093 [2020-11-07 00:45:53,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:45:53,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2020-11-07 00:45:53,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2092. [2020-11-07 00:45:53,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2020-11-07 00:45:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2859 transitions. [2020-11-07 00:45:53,547 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2859 transitions. Word has length 92 [2020-11-07 00:45:53,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:45:53,547 INFO L481 AbstractCegarLoop]: Abstraction has 2092 states and 2859 transitions. [2020-11-07 00:45:53,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:45:53,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2859 transitions. [2020-11-07 00:45:53,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-07 00:45:53,552 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:45:53,552 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, 1, 1, 1, 1, 1, 1, 1, 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 00:45:53,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 00:45:53,553 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:45:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:45:53,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1593424501, now seen corresponding path program 1 times [2020-11-07 00:45:53,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:45:53,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266833748] [2020-11-07 00:45:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:45:53,559 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:45:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:53,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:45:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:45:53,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266833748] [2020-11-07 00:45:53,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:45:53,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:45:53,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111382193] [2020-11-07 00:45:53,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:45:53,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:45:53,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:45:53,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:45:53,655 INFO L87 Difference]: Start difference. First operand 2092 states and 2859 transitions. Second operand 4 states. [2020-11-07 00:45:54,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:45:54,355 INFO L93 Difference]: Finished difference Result 2560 states and 3534 transitions. [2020-11-07 00:45:54,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:45:54,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2020-11-07 00:45:54,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:45:54,368 INFO L225 Difference]: With dead ends: 2560 [2020-11-07 00:45:54,369 INFO L226 Difference]: Without dead ends: 2557 [2020-11-07 00:45:54,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:45:54,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2020-11-07 00:45:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2092. [2020-11-07 00:45:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2020-11-07 00:45:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2843 transitions. [2020-11-07 00:45:54,723 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2843 transitions. Word has length 92 [2020-11-07 00:45:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:45:54,726 INFO L481 AbstractCegarLoop]: Abstraction has 2092 states and 2843 transitions. [2020-11-07 00:45:54,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:45:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2843 transitions. [2020-11-07 00:45:54,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-07 00:45:54,729 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:45:54,730 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:45:54,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 00:45:54,730 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:45:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:45:54,731 INFO L82 PathProgramCache]: Analyzing trace with hash 132646847, now seen corresponding path program 1 times [2020-11-07 00:45:54,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:45:54,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659064925] [2020-11-07 00:45:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:45:54,736 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:45:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:54,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:45:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:54,833 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 00:45:54,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659064925] [2020-11-07 00:45:54,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:45:54,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:45:54,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520231082] [2020-11-07 00:45:54,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:45:54,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:45:54,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:45:54,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:45:54,837 INFO L87 Difference]: Start difference. First operand 2092 states and 2843 transitions. Second operand 4 states. [2020-11-07 00:45:55,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:45:55,691 INFO L93 Difference]: Finished difference Result 2544 states and 3486 transitions. [2020-11-07 00:45:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:45:55,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-11-07 00:45:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:45:55,706 INFO L225 Difference]: With dead ends: 2544 [2020-11-07 00:45:55,706 INFO L226 Difference]: Without dead ends: 2541 [2020-11-07 00:45:55,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:45:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2020-11-07 00:45:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2092. [2020-11-07 00:45:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2020-11-07 00:45:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2827 transitions. [2020-11-07 00:45:56,063 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2827 transitions. Word has length 93 [2020-11-07 00:45:56,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:45:56,064 INFO L481 AbstractCegarLoop]: Abstraction has 2092 states and 2827 transitions. [2020-11-07 00:45:56,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:45:56,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2827 transitions. [2020-11-07 00:45:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-07 00:45:56,067 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:45:56,067 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:45:56,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 00:45:56,067 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:45:56,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:45:56,068 INFO L82 PathProgramCache]: Analyzing trace with hash -540047414, now seen corresponding path program 1 times [2020-11-07 00:45:56,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:45:56,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435470700] [2020-11-07 00:45:56,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:45:56,071 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:45:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:56,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:45:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:56,137 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 00:45:56,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435470700] [2020-11-07 00:45:56,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:45:56,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:45:56,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421422898] [2020-11-07 00:45:56,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:45:56,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:45:56,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:45:56,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:45:56,140 INFO L87 Difference]: Start difference. First operand 2092 states and 2827 transitions. Second operand 4 states. [2020-11-07 00:45:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:45:57,177 INFO L93 Difference]: Finished difference Result 6064 states and 8238 transitions. [2020-11-07 00:45:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:45:57,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-11-07 00:45:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:45:57,199 INFO L225 Difference]: With dead ends: 6064 [2020-11-07 00:45:57,200 INFO L226 Difference]: Without dead ends: 4029 [2020-11-07 00:45:57,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:45:57,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4029 states. [2020-11-07 00:45:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4029 to 4028. [2020-11-07 00:45:57,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4028 states. [2020-11-07 00:45:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 5403 transitions. [2020-11-07 00:45:57,907 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 5403 transitions. Word has length 93 [2020-11-07 00:45:57,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:45:57,907 INFO L481 AbstractCegarLoop]: Abstraction has 4028 states and 5403 transitions. [2020-11-07 00:45:57,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:45:57,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 5403 transitions. [2020-11-07 00:45:57,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-07 00:45:57,912 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:45:57,912 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:45:57,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 00:45:57,912 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:45:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:45:57,913 INFO L82 PathProgramCache]: Analyzing trace with hash 446000829, now seen corresponding path program 1 times [2020-11-07 00:45:57,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:45:57,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025703693] [2020-11-07 00:45:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:45:57,916 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:45:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:57,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:45:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:45:57,981 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 00:45:57,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025703693] [2020-11-07 00:45:57,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:45:57,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:45:57,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281769702] [2020-11-07 00:45:57,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:45:57,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:45:57,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:45:57,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:45:57,984 INFO L87 Difference]: Start difference. First operand 4028 states and 5403 transitions. Second operand 4 states. [2020-11-07 00:45:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:45:59,340 INFO L93 Difference]: Finished difference Result 11776 states and 15838 transitions. [2020-11-07 00:45:59,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:45:59,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-11-07 00:45:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:45:59,374 INFO L225 Difference]: With dead ends: 11776 [2020-11-07 00:45:59,374 INFO L226 Difference]: Without dead ends: 7805 [2020-11-07 00:45:59,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:45:59,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2020-11-07 00:46:00,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7804. [2020-11-07 00:46:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7804 states. [2020-11-07 00:46:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 10363 transitions. [2020-11-07 00:46:00,347 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 10363 transitions. Word has length 94 [2020-11-07 00:46:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:46:00,348 INFO L481 AbstractCegarLoop]: Abstraction has 7804 states and 10363 transitions. [2020-11-07 00:46:00,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:46:00,348 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 10363 transitions. [2020-11-07 00:46:00,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-07 00:46:00,355 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:46:00,356 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:46:00,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 00:46:00,356 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:46:00,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:46:00,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2101262615, now seen corresponding path program 1 times [2020-11-07 00:46:00,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:46:00,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298537272] [2020-11-07 00:46:00,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:46:00,359 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:46:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:00,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:46:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:00,433 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 00:46:00,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298537272] [2020-11-07 00:46:00,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:46:00,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:46:00,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952066384] [2020-11-07 00:46:00,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:46:00,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:46:00,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:46:00,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:46:00,436 INFO L87 Difference]: Start difference. First operand 7804 states and 10363 transitions. Second operand 4 states. [2020-11-07 00:46:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:46:01,839 INFO L93 Difference]: Finished difference Result 9408 states and 12542 transitions. [2020-11-07 00:46:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:46:01,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-11-07 00:46:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:46:01,883 INFO L225 Difference]: With dead ends: 9408 [2020-11-07 00:46:01,883 INFO L226 Difference]: Without dead ends: 9405 [2020-11-07 00:46:01,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:46:01,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9405 states. [2020-11-07 00:46:03,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9405 to 7804. [2020-11-07 00:46:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7804 states. [2020-11-07 00:46:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 10299 transitions. [2020-11-07 00:46:03,058 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 10299 transitions. Word has length 94 [2020-11-07 00:46:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:46:03,059 INFO L481 AbstractCegarLoop]: Abstraction has 7804 states and 10299 transitions. [2020-11-07 00:46:03,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:46:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 10299 transitions. [2020-11-07 00:46:03,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 00:46:03,066 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:46:03,066 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:46:03,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 00:46:03,067 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:46:03,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:46:03,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1296146485, now seen corresponding path program 1 times [2020-11-07 00:46:03,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:46:03,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183414505] [2020-11-07 00:46:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:46:03,070 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:46:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:03,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:46:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:03,152 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 00:46:03,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183414505] [2020-11-07 00:46:03,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:46:03,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:46:03,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998752856] [2020-11-07 00:46:03,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:46:03,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:46:03,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:46:03,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:46:03,156 INFO L87 Difference]: Start difference. First operand 7804 states and 10299 transitions. Second operand 4 states. [2020-11-07 00:46:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:46:04,668 INFO L93 Difference]: Finished difference Result 9344 states and 12350 transitions. [2020-11-07 00:46:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:46:04,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-11-07 00:46:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:46:04,698 INFO L225 Difference]: With dead ends: 9344 [2020-11-07 00:46:04,698 INFO L226 Difference]: Without dead ends: 9341 [2020-11-07 00:46:04,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:46:04,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2020-11-07 00:46:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7804. [2020-11-07 00:46:05,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7804 states. [2020-11-07 00:46:05,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 10235 transitions. [2020-11-07 00:46:05,596 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 10235 transitions. Word has length 95 [2020-11-07 00:46:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:46:05,597 INFO L481 AbstractCegarLoop]: Abstraction has 7804 states and 10235 transitions. [2020-11-07 00:46:05,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:46:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 10235 transitions. [2020-11-07 00:46:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 00:46:05,603 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:46:05,603 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:46:05,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 00:46:05,604 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:46:05,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:46:05,604 INFO L82 PathProgramCache]: Analyzing trace with hash 948736822, now seen corresponding path program 1 times [2020-11-07 00:46:05,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:46:05,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715644645] [2020-11-07 00:46:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:46:05,607 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:46:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:05,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:46:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:05,679 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 00:46:05,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715644645] [2020-11-07 00:46:05,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:46:05,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:46:05,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941675741] [2020-11-07 00:46:05,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:46:05,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:46:05,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:46:05,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:46:05,682 INFO L87 Difference]: Start difference. First operand 7804 states and 10235 transitions. Second operand 4 states. [2020-11-07 00:46:07,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:46:07,865 INFO L93 Difference]: Finished difference Result 22912 states and 30078 transitions. [2020-11-07 00:46:07,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:46:07,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-11-07 00:46:07,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:46:07,914 INFO L225 Difference]: With dead ends: 22912 [2020-11-07 00:46:07,915 INFO L226 Difference]: Without dead ends: 15165 [2020-11-07 00:46:07,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:46:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15165 states. [2020-11-07 00:46:09,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15165 to 15164. [2020-11-07 00:46:09,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15164 states. [2020-11-07 00:46:09,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15164 states to 15164 states and 19643 transitions. [2020-11-07 00:46:09,925 INFO L78 Accepts]: Start accepts. Automaton has 15164 states and 19643 transitions. Word has length 95 [2020-11-07 00:46:09,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:46:09,926 INFO L481 AbstractCegarLoop]: Abstraction has 15164 states and 19643 transitions. [2020-11-07 00:46:09,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:46:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 15164 states and 19643 transitions. [2020-11-07 00:46:09,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-07 00:46:09,939 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:46:09,939 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:46:09,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 00:46:09,939 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:46:09,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:46:09,940 INFO L82 PathProgramCache]: Analyzing trace with hash 758365347, now seen corresponding path program 1 times [2020-11-07 00:46:09,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:46:09,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523384626] [2020-11-07 00:46:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:46:09,943 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:46:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:09,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:46:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:10,009 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 00:46:10,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523384626] [2020-11-07 00:46:10,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:46:10,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:46:10,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800285641] [2020-11-07 00:46:10,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:46:10,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:46:10,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:46:10,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:46:10,011 INFO L87 Difference]: Start difference. First operand 15164 states and 19643 transitions. Second operand 4 states. [2020-11-07 00:46:12,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:46:12,302 INFO L93 Difference]: Finished difference Result 17984 states and 23230 transitions. [2020-11-07 00:46:12,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:46:12,303 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-11-07 00:46:12,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:46:12,360 INFO L225 Difference]: With dead ends: 17984 [2020-11-07 00:46:12,360 INFO L226 Difference]: Without dead ends: 17981 [2020-11-07 00:46:12,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:46:12,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17981 states. [2020-11-07 00:46:14,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17981 to 15164. [2020-11-07 00:46:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15164 states. [2020-11-07 00:46:14,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15164 states to 15164 states and 19515 transitions. [2020-11-07 00:46:14,707 INFO L78 Accepts]: Start accepts. Automaton has 15164 states and 19515 transitions. Word has length 96 [2020-11-07 00:46:14,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:46:14,707 INFO L481 AbstractCegarLoop]: Abstraction has 15164 states and 19515 transitions. [2020-11-07 00:46:14,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:46:14,707 INFO L276 IsEmpty]: Start isEmpty. Operand 15164 states and 19515 transitions. [2020-11-07 00:46:14,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-07 00:46:14,719 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:46:14,720 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:46:14,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 00:46:14,720 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:46:14,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:46:14,721 INFO L82 PathProgramCache]: Analyzing trace with hash -646305047, now seen corresponding path program 1 times [2020-11-07 00:46:14,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:46:14,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010833083] [2020-11-07 00:46:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:46:14,724 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:46:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:14,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:46:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:14,804 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 00:46:14,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010833083] [2020-11-07 00:46:14,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:46:14,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:46:14,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887374183] [2020-11-07 00:46:14,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:46:14,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:46:14,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:46:14,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:46:14,807 INFO L87 Difference]: Start difference. First operand 15164 states and 19515 transitions. Second operand 4 states. [2020-11-07 00:46:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:46:18,777 INFO L93 Difference]: Finished difference Result 44608 states and 57406 transitions. [2020-11-07 00:46:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:46:18,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-11-07 00:46:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:46:18,848 INFO L225 Difference]: With dead ends: 44608 [2020-11-07 00:46:18,848 INFO L226 Difference]: Without dead ends: 29501 [2020-11-07 00:46:18,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:46:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29501 states. [2020-11-07 00:46:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29501 to 29500. [2020-11-07 00:46:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29500 states. [2020-11-07 00:46:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29500 states to 29500 states and 37435 transitions. [2020-11-07 00:46:22,627 INFO L78 Accepts]: Start accepts. Automaton has 29500 states and 37435 transitions. Word has length 96 [2020-11-07 00:46:22,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:46:22,627 INFO L481 AbstractCegarLoop]: Abstraction has 29500 states and 37435 transitions. [2020-11-07 00:46:22,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:46:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 29500 states and 37435 transitions. [2020-11-07 00:46:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-07 00:46:22,644 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:46:22,644 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:46:22,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 00:46:22,644 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:46:22,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:46:22,645 INFO L82 PathProgramCache]: Analyzing trace with hash 23734231, now seen corresponding path program 1 times [2020-11-07 00:46:22,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:46:22,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744033044] [2020-11-07 00:46:22,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:46:22,647 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:46:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:22,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:46:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:22,822 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 00:46:22,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744033044] [2020-11-07 00:46:22,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:46:22,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:46:22,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95523569] [2020-11-07 00:46:22,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:46:22,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:46:22,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:46:22,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:46:22,829 INFO L87 Difference]: Start difference. First operand 29500 states and 37435 transitions. Second operand 4 states. [2020-11-07 00:46:26,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:46:26,962 INFO L93 Difference]: Finished difference Result 34624 states and 43582 transitions. [2020-11-07 00:46:26,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:46:26,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-11-07 00:46:26,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:46:27,009 INFO L225 Difference]: With dead ends: 34624 [2020-11-07 00:46:27,010 INFO L226 Difference]: Without dead ends: 34621 [2020-11-07 00:46:27,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:46:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34621 states. [2020-11-07 00:46:30,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34621 to 29500. [2020-11-07 00:46:30,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29500 states. [2020-11-07 00:46:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29500 states to 29500 states and 37179 transitions. [2020-11-07 00:46:30,999 INFO L78 Accepts]: Start accepts. Automaton has 29500 states and 37179 transitions. Word has length 97 [2020-11-07 00:46:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:46:30,999 INFO L481 AbstractCegarLoop]: Abstraction has 29500 states and 37179 transitions. [2020-11-07 00:46:30,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:46:30,999 INFO L276 IsEmpty]: Start isEmpty. Operand 29500 states and 37179 transitions. [2020-11-07 00:46:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-07 00:46:31,010 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:46:31,010 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:46:31,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 00:46:31,010 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:46:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:46:31,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1447016098, now seen corresponding path program 1 times [2020-11-07 00:46:31,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:46:31,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623631033] [2020-11-07 00:46:31,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:46:31,013 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:46:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:31,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:46:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:46:31,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623631033] [2020-11-07 00:46:31,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:46:31,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:46:31,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648546428] [2020-11-07 00:46:31,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:46:31,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:46:31,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:46:31,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:46:31,100 INFO L87 Difference]: Start difference. First operand 29500 states and 37179 transitions. Second operand 4 states. [2020-11-07 00:46:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:46:38,360 INFO L93 Difference]: Finished difference Result 86848 states and 109374 transitions. [2020-11-07 00:46:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:46:38,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-11-07 00:46:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:46:38,438 INFO L225 Difference]: With dead ends: 86848 [2020-11-07 00:46:38,439 INFO L226 Difference]: Without dead ends: 57405 [2020-11-07 00:46:38,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:46:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57405 states. [2020-11-07 00:46:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57405 to 57404. [2020-11-07 00:46:45,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57404 states. [2020-11-07 00:46:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57404 states to 57404 states and 71227 transitions. [2020-11-07 00:46:45,548 INFO L78 Accepts]: Start accepts. Automaton has 57404 states and 71227 transitions. Word has length 97 [2020-11-07 00:46:45,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:46:45,549 INFO L481 AbstractCegarLoop]: Abstraction has 57404 states and 71227 transitions. [2020-11-07 00:46:45,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:46:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 57404 states and 71227 transitions. [2020-11-07 00:46:45,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-07 00:46:45,577 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:46:45,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:46:45,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 00:46:45,578 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:46:45,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:46:45,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1274982353, now seen corresponding path program 1 times [2020-11-07 00:46:45,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:46:45,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652073116] [2020-11-07 00:46:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:46:45,580 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:46:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:45,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:46:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:46:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:46:45,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652073116] [2020-11-07 00:46:45,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:46:45,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:46:45,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575564543] [2020-11-07 00:46:45,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:46:45,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:46:45,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:46:45,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:46:45,661 INFO L87 Difference]: Start difference. First operand 57404 states and 71227 transitions. Second operand 4 states. [2020-11-07 00:46:53,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:46:53,905 INFO L93 Difference]: Finished difference Result 66624 states and 81470 transitions. [2020-11-07 00:46:53,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:46:53,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-11-07 00:46:53,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:46:53,978 INFO L225 Difference]: With dead ends: 66624 [2020-11-07 00:46:53,978 INFO L226 Difference]: Without dead ends: 66621 [2020-11-07 00:46:53,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:46:54,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66621 states. [2020-11-07 00:47:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66621 to 57404. [2020-11-07 00:47:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57404 states. [2020-11-07 00:47:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57404 states to 57404 states and 70715 transitions. [2020-11-07 00:47:01,265 INFO L78 Accepts]: Start accepts. Automaton has 57404 states and 70715 transitions. Word has length 98 [2020-11-07 00:47:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:47:01,265 INFO L481 AbstractCegarLoop]: Abstraction has 57404 states and 70715 transitions. [2020-11-07 00:47:01,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:47:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 57404 states and 70715 transitions. [2020-11-07 00:47:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-07 00:47:01,287 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:47:01,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:47:01,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 00:47:01,287 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:47:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:47:01,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1915473685, now seen corresponding path program 1 times [2020-11-07 00:47:01,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:47:01,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403412979] [2020-11-07 00:47:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:47:01,290 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:47:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:47:01,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:47:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:47:01,362 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 00:47:01,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403412979] [2020-11-07 00:47:01,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:47:01,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:47:01,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520866849] [2020-11-07 00:47:01,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:47:01,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:47:01,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:47:01,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:47:01,365 INFO L87 Difference]: Start difference. First operand 57404 states and 70715 transitions. Second operand 4 states. [2020-11-07 00:47:15,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:47:15,890 INFO L93 Difference]: Finished difference Result 169023 states and 207933 transitions. [2020-11-07 00:47:15,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:47:15,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-11-07 00:47:15,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:47:16,000 INFO L225 Difference]: With dead ends: 169023 [2020-11-07 00:47:16,000 INFO L226 Difference]: Without dead ends: 57404 [2020-11-07 00:47:16,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:47:16,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57404 states. [2020-11-07 00:47:23,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57404 to 57404. [2020-11-07 00:47:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57404 states. [2020-11-07 00:47:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57404 states to 57404 states and 68667 transitions. [2020-11-07 00:47:23,605 INFO L78 Accepts]: Start accepts. Automaton has 57404 states and 68667 transitions. Word has length 98 [2020-11-07 00:47:23,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:47:23,605 INFO L481 AbstractCegarLoop]: Abstraction has 57404 states and 68667 transitions. [2020-11-07 00:47:23,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:47:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 57404 states and 68667 transitions. [2020-11-07 00:47:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-11-07 00:47:23,625 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:47:23,625 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:47:23,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 00:47:23,625 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:47:23,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:47:23,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1414488035, now seen corresponding path program 1 times [2020-11-07 00:47:23,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:47:23,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562483942] [2020-11-07 00:47:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:47:23,628 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:47:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:47:23,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:47:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:47:23,701 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 00:47:23,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562483942] [2020-11-07 00:47:23,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:47:23,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:47:23,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552229508] [2020-11-07 00:47:23,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:47:23,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:47:23,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:47:23,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:47:23,704 INFO L87 Difference]: Start difference. First operand 57404 states and 68667 transitions. Second operand 4 states. [2020-11-07 00:47:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:47:31,083 INFO L93 Difference]: Finished difference Result 57404 states and 68667 transitions. [2020-11-07 00:47:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:47:31,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-11-07 00:47:31,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:47:31,084 INFO L225 Difference]: With dead ends: 57404 [2020-11-07 00:47:31,084 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 00:47:31,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:47:31,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 00:47:31,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 00:47:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 00:47:31,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 00:47:31,177 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 99 [2020-11-07 00:47:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:47:31,178 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 00:47:31,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:47:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 00:47:31,178 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 00:47:31,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 00:47:31,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 00:47:50,860 WARN L194 SmtUtils]: Spent 19.53 s on a formula simplification. DAG size of input: 4288 DAG size of output: 34 [2020-11-07 00:47:55,145 WARN L194 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 2102 DAG size of output: 31 [2020-11-07 00:48:53,713 WARN L194 SmtUtils]: Spent 58.55 s on a formula simplification that was a NOOP. DAG size: 2125 [2020-11-07 00:49:11,367 WARN L194 SmtUtils]: Spent 17.64 s on a formula simplification. DAG size of input: 2134 DAG size of output: 581 [2020-11-07 00:49:13,835 WARN L194 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 1091 DAG size of output: 189 [2020-11-07 00:49:16,634 WARN L194 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 1120 DAG size of output: 191 [2020-11-07 00:49:18,445 WARN L194 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 1216 DAG size of output: 87 [2020-11-07 00:49:22,548 WARN L194 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 2107 DAG size of output: 45 [2020-11-07 00:50:11,576 WARN L194 SmtUtils]: Spent 49.01 s on a formula simplification. DAG size of input: 5285 DAG size of output: 31 [2020-11-07 00:50:19,241 WARN L194 SmtUtils]: Spent 7.66 s on a formula simplification. DAG size of input: 1095 DAG size of output: 581 [2020-11-07 00:50:29,111 WARN L194 SmtUtils]: Spent 9.85 s on a formula simplification. DAG size of input: 3010 DAG size of output: 53 [2020-11-07 00:50:44,709 WARN L194 SmtUtils]: Spent 15.59 s on a formula simplification that was a NOOP. DAG size: 1099 [2020-11-07 00:51:00,359 WARN L194 SmtUtils]: Spent 15.64 s on a formula simplification. DAG size of input: 2752 DAG size of output: 41 [2020-11-07 00:51:04,825 WARN L194 SmtUtils]: Spent 4.45 s on a formula simplification. DAG size of input: 2111 DAG size of output: 65 [2020-11-07 00:51:35,183 WARN L194 SmtUtils]: Spent 30.34 s on a formula simplification. DAG size of input: 4797 DAG size of output: 31 [2020-11-07 00:51:36,184 WARN L194 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 1076 DAG size of output: 31 [2020-11-07 00:51:46,256 WARN L194 SmtUtils]: Spent 10.06 s on a formula simplification. DAG size of input: 2146 DAG size of output: 321 [2020-11-07 00:51:48,303 WARN L194 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 1144 DAG size of output: 123 [2020-11-07 00:51:50,146 WARN L194 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 1312 DAG size of output: 67 [2020-11-07 00:52:45,722 WARN L194 SmtUtils]: Spent 55.56 s on a formula simplification. DAG size of input: 5312 DAG size of output: 31 [2020-11-07 00:52:51,280 WARN L194 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 2115 DAG size of output: 121 [2020-11-07 00:52:52,331 WARN L194 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 1081 DAG size of output: 45 [2020-11-07 00:53:11,816 WARN L194 SmtUtils]: Spent 19.47 s on a formula simplification. DAG size of input: 3778 DAG size of output: 45 [2020-11-07 00:53:19,493 WARN L194 SmtUtils]: Spent 7.67 s on a formula simplification. DAG size of input: 1102 DAG size of output: 583 [2020-11-07 00:53:35,949 WARN L194 SmtUtils]: Spent 16.44 s on a formula simplification. DAG size of input: 4288 DAG size of output: 34 [2020-11-07 00:54:30,806 WARN L194 SmtUtils]: Spent 54.84 s on a formula simplification. DAG size of input: 5312 DAG size of output: 31 [2020-11-07 00:55:13,932 WARN L194 SmtUtils]: Spent 43.11 s on a formula simplification. DAG size of input: 5235 DAG size of output: 31 [2020-11-07 00:55:23,986 WARN L194 SmtUtils]: Spent 10.04 s on a formula simplification. DAG size of input: 2119 DAG size of output: 321 [2020-11-07 00:55:25,172 WARN L194 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 1085 DAG size of output: 65 [2020-11-07 00:55:32,150 WARN L194 SmtUtils]: Spent 6.97 s on a formula simplification. DAG size of input: 2194 DAG size of output: 189 [2020-11-07 00:55:33,900 WARN L194 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 1216 DAG size of output: 87 [2020-11-07 00:55:36,905 WARN L194 SmtUtils]: Spent 3.00 s on a formula simplification. DAG size of input: 1600 DAG size of output: 55 [2020-11-07 00:56:01,452 WARN L194 SmtUtils]: Spent 24.52 s on a formula simplification. DAG size of input: 4411 DAG size of output: 31 [2020-11-07 00:56:30,577 WARN L194 SmtUtils]: Spent 29.11 s on a formula simplification. DAG size of input: 2123 DAG size of output: 1097 [2020-11-07 00:56:32,302 WARN L194 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 1089 DAG size of output: 121 [2020-11-07 00:56:46,679 WARN L194 SmtUtils]: Spent 14.37 s on a formula simplification that was a NOOP. DAG size: 1099 [2020-11-07 00:57:44,048 WARN L194 SmtUtils]: Spent 57.35 s on a formula simplification. DAG size of input: 5314 DAG size of output: 39 [2020-11-07 00:57:48,537 WARN L194 SmtUtils]: Spent 4.48 s on a formula simplification. DAG size of input: 1108 DAG size of output: 323 [2020-11-07 00:57:52,521 WARN L194 SmtUtils]: Spent 3.97 s on a formula simplification. DAG size of input: 2105 DAG size of output: 39 [2020-11-07 00:58:42,852 WARN L194 SmtUtils]: Spent 50.31 s on a formula simplification. DAG size of input: 5307 DAG size of output: 31 [2020-11-07 00:58:46,744 WARN L194 SmtUtils]: Spent 3.88 s on a formula simplification. DAG size of input: 2102 DAG size of output: 31 [2020-11-07 00:58:52,604 WARN L194 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 2242 DAG size of output: 121 [2020-11-07 00:58:56,847 WARN L194 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 1093 DAG size of output: 321 [2020-11-07 00:58:58,725 WARN L194 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 1312 DAG size of output: 67 [2020-11-07 00:59:04,413 WARN L194 SmtUtils]: Spent 5.68 s on a formula simplification. DAG size of input: 1984 DAG size of output: 47 [2020-11-07 00:59:08,642 WARN L194 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 2109 DAG size of output: 53 [2020-11-07 00:59:49,320 WARN L194 SmtUtils]: Spent 40.66 s on a formula simplification. DAG size of input: 5185 DAG size of output: 31