/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 23:02:53,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:02:53,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:02:53,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 23:02:53,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 23:02:53,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 23:02:53,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 23:02:53,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 23:02:53,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 23:02:53,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 23:02:53,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 23:02:53,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 23:02:53,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:02:53,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:02:53,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:02:53,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:02:53,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:02:53,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:02:53,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:02:53,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:02:53,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:02:53,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:02:53,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:02:53,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:02:53,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 23:02:53,202 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 23:02:53,202 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 23:02:53,203 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 23:02:53,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 23:02:53,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 23:02:53,206 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 23:02:53,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 23:02:53,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 23:02:53,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 23:02:53,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 23:02:53,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 23:02:53,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 23:02:53,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 23:02:53,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:02:53,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:02:53,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:02:53,222 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 23:02:53,287 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:02:53,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:02:53,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:02:53,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:02:53,290 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:02:53,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:02:53,290 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:02:53,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:02:53,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:02:53,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:02:53,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:02:53,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:02:53,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:02:53,292 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:02:53,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:02:53,293 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:02:53,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:02:53,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:02:53,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:02:53,294 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:02:53,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:02:53,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:02:53,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:02:53,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:02:53,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:02:53,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:02:53,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:02:53,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:02:53,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:02:53,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:02:53,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:02:53,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:02:53,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:02:53,702 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:02:53,703 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:02:53,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-11-06 23:02:53,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e24649fd1/af1865d0290648ca9c4dc5c5c00ee7f8/FLAG4c235d179 [2020-11-06 23:02:54,690 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:02:54,691 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-11-06 23:02:54,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e24649fd1/af1865d0290648ca9c4dc5c5c00ee7f8/FLAG4c235d179 [2020-11-06 23:02:54,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e24649fd1/af1865d0290648ca9c4dc5c5c00ee7f8 [2020-11-06 23:02:54,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:02:54,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:02:54,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:02:54,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:02:54,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:02:54,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:54" (1/1) ... [2020-11-06 23:02:54,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@668df651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:54, skipping insertion in model container [2020-11-06 23:02:54,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:54" (1/1) ... [2020-11-06 23:02:54,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:02:54,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:02:55,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:02:55,937 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:02:56,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:02:56,426 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:02:56,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:56 WrapperNode [2020-11-06 23:02:56,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:02:56,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:02:56,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:02:56,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:02:56,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:56" (1/1) ... [2020-11-06 23:02:56,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:56" (1/1) ... [2020-11-06 23:02:56,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:56" (1/1) ... [2020-11-06 23:02:56,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:56" (1/1) ... [2020-11-06 23:02:56,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:56" (1/1) ... [2020-11-06 23:02:56,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:56" (1/1) ... [2020-11-06 23:02:56,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:56" (1/1) ... [2020-11-06 23:02:56,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:02:56,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:02:56,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:02:56,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:02:56,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:56" (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 [2020-11-06 23:02:56,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:02:56,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:02:56,751 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:02:56,752 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:02:56,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:02:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:02:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:02:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:02:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:02:56,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:02:56,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:02:56,754 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:02:56,754 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:02:56,755 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:02:56,755 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:02:56,756 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:02:56,757 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:02:56,757 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:02:56,758 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:02:56,758 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:02:56,758 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:02:56,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:02:56,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:02:56,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:02:56,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:02:56,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:02:56,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:02:56,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:02:59,602 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:02:59,603 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:02:59,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:59 BoogieIcfgContainer [2020-11-06 23:02:59,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:02:59,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:02:59,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:02:59,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:02:59,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:02:54" (1/3) ... [2020-11-06 23:02:59,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441d48d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:59, skipping insertion in model container [2020-11-06 23:02:59,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:56" (2/3) ... [2020-11-06 23:02:59,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441d48d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:59, skipping insertion in model container [2020-11-06 23:02:59,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:59" (3/3) ... [2020-11-06 23:02:59,617 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-11-06 23:02:59,633 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:02:59,638 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:02:59,651 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:02:59,718 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:02:59,719 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:02:59,719 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:02:59,719 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:02:59,719 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:02:59,719 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:02:59,719 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:02:59,719 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:02:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states. [2020-11-06 23:02:59,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-06 23:02:59,798 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:59,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:02:59,800 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:59,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:59,807 INFO L82 PathProgramCache]: Analyzing trace with hash -540047237, now seen corresponding path program 1 times [2020-11-06 23:02:59,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:59,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712330333] [2020-11-06 23:02:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:01,393 WARN L194 SmtUtils]: Spent 588.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:03:01,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:01,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712330333] [2020-11-06 23:03:01,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:01,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:01,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347546654] [2020-11-06 23:03:01,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:01,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:01,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:01,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:01,766 INFO L87 Difference]: Start difference. First operand 799 states. Second operand 4 states. [2020-11-06 23:03:02,573 WARN L194 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-11-06 23:03:08,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:08,557 INFO L93 Difference]: Finished difference Result 1496 states and 2629 transitions. [2020-11-06 23:03:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:08,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-11-06 23:03:08,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:08,589 INFO L225 Difference]: With dead ends: 1496 [2020-11-06 23:03:08,590 INFO L226 Difference]: Without dead ends: 1286 [2020-11-06 23:03:08,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:08,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2020-11-06 23:03:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1283. [2020-11-06 23:03:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1283 states. [2020-11-06 23:03:08,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 2006 transitions. [2020-11-06 23:03:08,769 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 2006 transitions. Word has length 325 [2020-11-06 23:03:08,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:08,771 INFO L481 AbstractCegarLoop]: Abstraction has 1283 states and 2006 transitions. [2020-11-06 23:03:08,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:08,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 2006 transitions. [2020-11-06 23:03:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-06 23:03:08,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:08,782 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:08,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:03:08,782 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:08,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:08,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1948349173, now seen corresponding path program 1 times [2020-11-06 23:03:08,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:08,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500910996] [2020-11-06 23:03:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:09,959 WARN L194 SmtUtils]: Spent 900.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:03:09,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:10,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500910996] [2020-11-06 23:03:10,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:10,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:10,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235467860] [2020-11-06 23:03:10,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:10,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:10,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:10,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:10,274 INFO L87 Difference]: Start difference. First operand 1283 states and 2006 transitions. Second operand 4 states. [2020-11-06 23:03:11,045 WARN L194 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-11-06 23:03:16,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:16,012 INFO L93 Difference]: Finished difference Result 2615 states and 4121 transitions. [2020-11-06 23:03:16,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:16,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-11-06 23:03:16,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:16,032 INFO L225 Difference]: With dead ends: 2615 [2020-11-06 23:03:16,033 INFO L226 Difference]: Without dead ends: 2250 [2020-11-06 23:03:16,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:16,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2020-11-06 23:03:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2247. [2020-11-06 23:03:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2247 states. [2020-11-06 23:03:16,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3508 transitions. [2020-11-06 23:03:16,169 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3508 transitions. Word has length 325 [2020-11-06 23:03:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:16,171 INFO L481 AbstractCegarLoop]: Abstraction has 2247 states and 3508 transitions. [2020-11-06 23:03:16,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:16,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3508 transitions. [2020-11-06 23:03:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-06 23:03:16,183 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:16,184 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:16,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:03:16,189 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:16,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:16,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1821978594, now seen corresponding path program 1 times [2020-11-06 23:03:16,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:16,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075932047] [2020-11-06 23:03:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:17,197 WARN L194 SmtUtils]: Spent 674.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:03:17,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:17,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075932047] [2020-11-06 23:03:17,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:17,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:17,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314230914] [2020-11-06 23:03:17,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:17,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:17,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:17,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:17,406 INFO L87 Difference]: Start difference. First operand 2247 states and 3508 transitions. Second operand 4 states. [2020-11-06 23:03:18,225 WARN L194 SmtUtils]: Spent 752.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-11-06 23:03:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:22,996 INFO L93 Difference]: Finished difference Result 4825 states and 7596 transitions. [2020-11-06 23:03:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:22,999 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-11-06 23:03:23,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:23,023 INFO L225 Difference]: With dead ends: 4825 [2020-11-06 23:03:23,024 INFO L226 Difference]: Without dead ends: 4142 [2020-11-06 23:03:23,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:23,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2020-11-06 23:03:23,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 4139. [2020-11-06 23:03:23,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4139 states. [2020-11-06 23:03:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 6448 transitions. [2020-11-06 23:03:23,194 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 6448 transitions. Word has length 325 [2020-11-06 23:03:23,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:23,194 INFO L481 AbstractCegarLoop]: Abstraction has 4139 states and 6448 transitions. [2020-11-06 23:03:23,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:23,195 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 6448 transitions. [2020-11-06 23:03:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-06 23:03:23,210 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:23,210 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:23,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:03:23,210 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:23,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:23,212 INFO L82 PathProgramCache]: Analyzing trace with hash 479714806, now seen corresponding path program 1 times [2020-11-06 23:03:23,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:23,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831628860] [2020-11-06 23:03:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:24,336 WARN L194 SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:03:24,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:24,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831628860] [2020-11-06 23:03:24,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:24,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:24,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009834680] [2020-11-06 23:03:24,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:24,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:24,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:24,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:24,498 INFO L87 Difference]: Start difference. First operand 4139 states and 6448 transitions. Second operand 4 states. [2020-11-06 23:03:25,266 WARN L194 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-11-06 23:03:30,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:30,010 INFO L93 Difference]: Finished difference Result 9129 states and 14344 transitions. [2020-11-06 23:03:30,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:30,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-11-06 23:03:30,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:30,053 INFO L225 Difference]: With dead ends: 9129 [2020-11-06 23:03:30,053 INFO L226 Difference]: Without dead ends: 7854 [2020-11-06 23:03:30,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:30,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7854 states. [2020-11-06 23:03:30,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7854 to 7851. [2020-11-06 23:03:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7851 states. [2020-11-06 23:03:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7851 states to 7851 states and 12200 transitions. [2020-11-06 23:03:30,328 INFO L78 Accepts]: Start accepts. Automaton has 7851 states and 12200 transitions. Word has length 325 [2020-11-06 23:03:30,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:30,329 INFO L481 AbstractCegarLoop]: Abstraction has 7851 states and 12200 transitions. [2020-11-06 23:03:30,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:30,329 INFO L276 IsEmpty]: Start isEmpty. Operand 7851 states and 12200 transitions. [2020-11-06 23:03:30,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-06 23:03:30,351 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:30,351 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:30,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:03:30,352 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:30,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:30,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1772496259, now seen corresponding path program 1 times [2020-11-06 23:03:30,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:30,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445146366] [2020-11-06 23:03:30,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:31,788 WARN L194 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:03:31,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:31,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445146366] [2020-11-06 23:03:31,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:31,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:31,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761634754] [2020-11-06 23:03:32,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:32,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:32,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:32,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:32,001 INFO L87 Difference]: Start difference. First operand 7851 states and 12200 transitions. Second operand 5 states. [2020-11-06 23:03:38,884 WARN L194 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-11-06 23:03:41,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:41,032 INFO L93 Difference]: Finished difference Result 23226 states and 36057 transitions. [2020-11-06 23:03:41,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:03:41,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-11-06 23:03:41,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:41,117 INFO L225 Difference]: With dead ends: 23226 [2020-11-06 23:03:41,118 INFO L226 Difference]: Without dead ends: 15390 [2020-11-06 23:03:41,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:03:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15390 states. [2020-11-06 23:03:41,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15390 to 15387. [2020-11-06 23:03:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15387 states. [2020-11-06 23:03:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15387 states to 15387 states and 23773 transitions. [2020-11-06 23:03:41,744 INFO L78 Accepts]: Start accepts. Automaton has 15387 states and 23773 transitions. Word has length 325 [2020-11-06 23:03:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:41,745 INFO L481 AbstractCegarLoop]: Abstraction has 15387 states and 23773 transitions. [2020-11-06 23:03:41,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:03:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 15387 states and 23773 transitions. [2020-11-06 23:03:41,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-11-06 23:03:41,778 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:41,779 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:41,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:03:41,785 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:41,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:41,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2109001558, now seen corresponding path program 1 times [2020-11-06 23:03:41,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:41,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065230922] [2020-11-06 23:03:41,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:42,726 WARN L194 SmtUtils]: Spent 743.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:03:42,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:42,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065230922] [2020-11-06 23:03:42,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:42,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:42,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737504500] [2020-11-06 23:03:42,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:42,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:42,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:42,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:42,880 INFO L87 Difference]: Start difference. First operand 15387 states and 23773 transitions. Second operand 4 states. [2020-11-06 23:03:51,274 WARN L194 SmtUtils]: Spent 715.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-11-06 23:03:53,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:53,344 INFO L93 Difference]: Finished difference Result 45422 states and 70075 transitions. [2020-11-06 23:03:53,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:53,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-11-06 23:03:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:53,414 INFO L225 Difference]: With dead ends: 45422 [2020-11-06 23:03:53,415 INFO L226 Difference]: Without dead ends: 30164 [2020-11-06 23:03:53,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:53,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30164 states. [2020-11-06 23:03:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30164 to 30161. [2020-11-06 23:03:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30161 states. [2020-11-06 23:03:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30161 states to 30161 states and 46322 transitions. [2020-11-06 23:03:54,652 INFO L78 Accepts]: Start accepts. Automaton has 30161 states and 46322 transitions. Word has length 327 [2020-11-06 23:03:54,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:54,652 INFO L481 AbstractCegarLoop]: Abstraction has 30161 states and 46322 transitions. [2020-11-06 23:03:54,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 30161 states and 46322 transitions. [2020-11-06 23:03:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-11-06 23:03:54,712 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:54,712 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:54,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:03:54,713 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:54,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:54,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1610721851, now seen corresponding path program 1 times [2020-11-06 23:03:54,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:54,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616800625] [2020-11-06 23:03:54,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:55,526 WARN L194 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:03:55,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:55,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616800625] [2020-11-06 23:03:55,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:55,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:55,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085716335] [2020-11-06 23:03:55,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:55,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:55,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:55,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:55,814 INFO L87 Difference]: Start difference. First operand 30161 states and 46322 transitions. Second operand 4 states. [2020-11-06 23:04:06,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:06,299 INFO L93 Difference]: Finished difference Result 90406 states and 138841 transitions. [2020-11-06 23:04:06,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:04:06,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-11-06 23:04:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:06,430 INFO L225 Difference]: With dead ends: 90406 [2020-11-06 23:04:06,430 INFO L226 Difference]: Without dead ends: 60287 [2020-11-06 23:04:06,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:06,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60287 states. [2020-11-06 23:04:07,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60287 to 30180. [2020-11-06 23:04:07,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30180 states. [2020-11-06 23:04:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30180 states to 30180 states and 46350 transitions. [2020-11-06 23:04:08,030 INFO L78 Accepts]: Start accepts. Automaton has 30180 states and 46350 transitions. Word has length 327 [2020-11-06 23:04:08,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:08,030 INFO L481 AbstractCegarLoop]: Abstraction has 30180 states and 46350 transitions. [2020-11-06 23:04:08,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 30180 states and 46350 transitions. [2020-11-06 23:04:08,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-11-06 23:04:08,083 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:08,083 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:04:08,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:04:08,084 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:08,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:08,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1243961186, now seen corresponding path program 1 times [2020-11-06 23:04:08,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:08,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281125685] [2020-11-06 23:04:08,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:09,118 WARN L194 SmtUtils]: Spent 891.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:04:09,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:09,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281125685] [2020-11-06 23:04:09,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:09,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:09,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075658998] [2020-11-06 23:04:09,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:09,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:09,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:09,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:09,241 INFO L87 Difference]: Start difference. First operand 30180 states and 46350 transitions. Second operand 4 states. [2020-11-06 23:04:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:20,524 INFO L93 Difference]: Finished difference Result 90425 states and 138862 transitions. [2020-11-06 23:04:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:04:20,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-11-06 23:04:20,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:20,650 INFO L225 Difference]: With dead ends: 90425 [2020-11-06 23:04:20,650 INFO L226 Difference]: Without dead ends: 60305 [2020-11-06 23:04:20,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:20,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60305 states. [2020-11-06 23:04:22,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60305 to 30198. [2020-11-06 23:04:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30198 states. [2020-11-06 23:04:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30198 states to 30198 states and 46371 transitions. [2020-11-06 23:04:22,112 INFO L78 Accepts]: Start accepts. Automaton has 30198 states and 46371 transitions. Word has length 328 [2020-11-06 23:04:22,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:22,113 INFO L481 AbstractCegarLoop]: Abstraction has 30198 states and 46371 transitions. [2020-11-06 23:04:22,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:22,113 INFO L276 IsEmpty]: Start isEmpty. Operand 30198 states and 46371 transitions. [2020-11-06 23:04:22,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-11-06 23:04:22,143 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:22,143 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:04:22,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:04:22,144 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:22,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:22,144 INFO L82 PathProgramCache]: Analyzing trace with hash -974279761, now seen corresponding path program 1 times [2020-11-06 23:04:22,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:22,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958524581] [2020-11-06 23:04:22,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:23,028 WARN L194 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:04:23,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:23,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958524581] [2020-11-06 23:04:23,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:23,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:23,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902518593] [2020-11-06 23:04:23,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:23,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:23,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:23,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:23,423 INFO L87 Difference]: Start difference. First operand 30198 states and 46371 transitions. Second operand 4 states. [2020-11-06 23:04:32,757 WARN L194 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-11-06 23:04:35,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:35,287 INFO L93 Difference]: Finished difference Result 85719 states and 131396 transitions. [2020-11-06 23:04:35,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:04:35,293 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-11-06 23:04:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:35,378 INFO L225 Difference]: With dead ends: 85719 [2020-11-06 23:04:35,378 INFO L226 Difference]: Without dead ends: 55766 [2020-11-06 23:04:35,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55766 states. [2020-11-06 23:04:37,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55766 to 55763. [2020-11-06 23:04:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55763 states. [2020-11-06 23:04:37,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55763 states to 55763 states and 85029 transitions. [2020-11-06 23:04:37,782 INFO L78 Accepts]: Start accepts. Automaton has 55763 states and 85029 transitions. Word has length 329 [2020-11-06 23:04:37,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:37,782 INFO L481 AbstractCegarLoop]: Abstraction has 55763 states and 85029 transitions. [2020-11-06 23:04:37,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:37,783 INFO L276 IsEmpty]: Start isEmpty. Operand 55763 states and 85029 transitions. [2020-11-06 23:04:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-11-06 23:04:38,090 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:38,091 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:04:38,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:04:38,096 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:38,097 INFO L82 PathProgramCache]: Analyzing trace with hash -822224782, now seen corresponding path program 1 times [2020-11-06 23:04:38,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:38,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053052977] [2020-11-06 23:04:38,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:39,375 WARN L194 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:04:39,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:39,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053052977] [2020-11-06 23:04:39,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:39,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:04:39,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547870809] [2020-11-06 23:04:39,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:04:39,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:39,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:04:39,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:39,565 INFO L87 Difference]: Start difference. First operand 55763 states and 85029 transitions. Second operand 5 states. [2020-11-06 23:04:48,911 WARN L194 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-11-06 23:04:52,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:52,235 INFO L93 Difference]: Finished difference Result 164669 states and 250700 transitions. [2020-11-06 23:04:52,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:04:52,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 329 [2020-11-06 23:04:52,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:52,390 INFO L225 Difference]: With dead ends: 164669 [2020-11-06 23:04:52,390 INFO L226 Difference]: Without dead ends: 108965 [2020-11-06 23:04:52,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:04:52,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108965 states. [2020-11-06 23:04:57,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108965 to 108962. [2020-11-06 23:04:57,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108962 states. [2020-11-06 23:04:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108962 states to 108962 states and 164964 transitions. [2020-11-06 23:04:58,036 INFO L78 Accepts]: Start accepts. Automaton has 108962 states and 164964 transitions. Word has length 329 [2020-11-06 23:04:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:58,036 INFO L481 AbstractCegarLoop]: Abstraction has 108962 states and 164964 transitions. [2020-11-06 23:04:58,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:04:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 108962 states and 164964 transitions. [2020-11-06 23:04:58,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-06 23:04:58,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:58,115 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:04:58,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:04:58,116 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:58,116 INFO L82 PathProgramCache]: Analyzing trace with hash -953910148, now seen corresponding path program 1 times [2020-11-06 23:04:58,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:58,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703530575] [2020-11-06 23:04:58,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:59,504 WARN L194 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:04:59,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:59,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703530575] [2020-11-06 23:04:59,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:59,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:04:59,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990943855] [2020-11-06 23:04:59,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:04:59,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:59,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:04:59,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:59,792 INFO L87 Difference]: Start difference. First operand 108962 states and 164964 transitions. Second operand 5 states. [2020-11-06 23:05:12,442 WARN L194 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-11-06 23:05:17,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:17,537 INFO L93 Difference]: Finished difference Result 321743 states and 486225 transitions. [2020-11-06 23:05:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:05:17,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-11-06 23:05:17,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:18,021 INFO L225 Difference]: With dead ends: 321743 [2020-11-06 23:05:18,021 INFO L226 Difference]: Without dead ends: 212902 [2020-11-06 23:05:18,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:05:18,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212902 states. [2020-11-06 23:05:28,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212902 to 212899. [2020-11-06 23:05:28,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212899 states. [2020-11-06 23:05:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212899 states to 212899 states and 319813 transitions. [2020-11-06 23:05:29,205 INFO L78 Accepts]: Start accepts. Automaton has 212899 states and 319813 transitions. Word has length 331 [2020-11-06 23:05:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:29,205 INFO L481 AbstractCegarLoop]: Abstraction has 212899 states and 319813 transitions. [2020-11-06 23:05:29,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:05:29,205 INFO L276 IsEmpty]: Start isEmpty. Operand 212899 states and 319813 transitions. [2020-11-06 23:05:29,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-06 23:05:29,379 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:29,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:05:29,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:05:29,379 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:29,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:29,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2020014146, now seen corresponding path program 1 times [2020-11-06 23:05:29,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:29,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751520068] [2020-11-06 23:05:29,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:30,845 WARN L194 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:05:30,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:05:31,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751520068] [2020-11-06 23:05:31,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:31,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:05:31,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084037628] [2020-11-06 23:05:31,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:05:31,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:31,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:05:31,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:05:31,127 INFO L87 Difference]: Start difference. First operand 212899 states and 319813 transitions. Second operand 5 states. [2020-11-06 23:05:50,601 WARN L194 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-11-06 23:05:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:59,295 INFO L93 Difference]: Finished difference Result 629295 states and 943772 transitions. [2020-11-06 23:05:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:05:59,296 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-11-06 23:05:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:06:00,187 INFO L225 Difference]: With dead ends: 629295 [2020-11-06 23:06:00,187 INFO L226 Difference]: Without dead ends: 416630 [2020-11-06 23:06:00,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:06:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416630 states. [2020-11-06 23:06:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416630 to 416627. [2020-11-06 23:06:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416627 states. [2020-11-06 23:06:22,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416627 states to 416627 states and 621253 transitions. [2020-11-06 23:06:22,599 INFO L78 Accepts]: Start accepts. Automaton has 416627 states and 621253 transitions. Word has length 331 [2020-11-06 23:06:22,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:22,599 INFO L481 AbstractCegarLoop]: Abstraction has 416627 states and 621253 transitions. [2020-11-06 23:06:22,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:06:22,600 INFO L276 IsEmpty]: Start isEmpty. Operand 416627 states and 621253 transitions. [2020-11-06 23:06:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-11-06 23:06:23,568 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:23,569 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:06:23,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:06:23,569 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:23,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1193282924, now seen corresponding path program 1 times [2020-11-06 23:06:23,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:23,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789249077] [2020-11-06 23:06:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:24,458 WARN L194 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:06:24,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:06:24,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789249077] [2020-11-06 23:06:24,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:24,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:06:24,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255612492] [2020-11-06 23:06:24,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:06:24,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:24,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:06:24,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:24,878 INFO L87 Difference]: Start difference. First operand 416627 states and 621253 transitions. Second operand 4 states.