/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 17:14:46,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 17:14:46,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 17:14:46,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 17:14:46,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 17:14:46,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 17:14:46,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 17:14:46,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 17:14:46,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 17:14:46,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 17:14:46,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 17:14:46,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 17:14:46,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 17:14:46,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 17:14:46,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 17:14:46,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 17:14:46,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 17:14:46,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 17:14:46,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 17:14:46,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 17:14:46,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 17:14:46,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 17:14:46,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 17:14:46,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 17:14:46,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 17:14:46,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 17:14:46,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 17:14:46,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 17:14:46,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 17:14:46,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 17:14:46,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 17:14:46,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 17:14:46,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 17:14:46,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 17:14:46,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 17:14:46,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 17:14:46,609 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 [2020-08-22 17:14:46,652 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 17:14:46,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 17:14:46,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 17:14:46,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 17:14:46,655 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 17:14:46,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 17:14:46,656 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 17:14:46,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 17:14:46,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 17:14:46,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 17:14:46,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 17:14:46,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 17:14:46,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 17:14:46,657 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 17:14:46,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 17:14:46,657 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 17:14:46,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 17:14:46,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 17:14:46,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 17:14:46,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 17:14:46,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 17:14:46,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 17:14:46,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 17:14:46,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 17:14:46,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 17:14:46,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 17:14:46,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 17:14:46,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 17:14:46,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 17:14:46,660 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 17:14:46,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 17:14:46,947 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 17:14:46,951 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 17:14:46,952 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 17:14:46,953 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 17:14:46,953 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-08-22 17:14:47,012 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e13b77ce/e2134a73fb554e5dadb5c5b2f76b149c/FLAG2baea30fd [2020-08-22 17:14:47,658 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 17:14:47,658 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-08-22 17:14:47,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e13b77ce/e2134a73fb554e5dadb5c5b2f76b149c/FLAG2baea30fd [2020-08-22 17:14:47,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e13b77ce/e2134a73fb554e5dadb5c5b2f76b149c [2020-08-22 17:14:47,845 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 17:14:47,847 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 17:14:47,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 17:14:47,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 17:14:47,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 17:14:47,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:14:47" (1/1) ... [2020-08-22 17:14:47,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fb5ad65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:47, skipping insertion in model container [2020-08-22 17:14:47,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:14:47" (1/1) ... [2020-08-22 17:14:47,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 17:14:48,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 17:14:49,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:14:49,649 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 17:14:50,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:14:50,929 INFO L208 MainTranslator]: Completed translation [2020-08-22 17:14:50,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:50 WrapperNode [2020-08-22 17:14:50,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 17:14:50,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 17:14:50,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 17:14:50,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 17:14:50,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:50" (1/1) ... [2020-08-22 17:14:50,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:50" (1/1) ... [2020-08-22 17:14:51,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:50" (1/1) ... [2020-08-22 17:14:51,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:50" (1/1) ... [2020-08-22 17:14:51,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:50" (1/1) ... [2020-08-22 17:14:51,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:50" (1/1) ... [2020-08-22 17:14:51,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:50" (1/1) ... [2020-08-22 17:14:51,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 17:14:51,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 17:14:51,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 17:14:51,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 17:14:51,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:50" (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 [2020-08-22 17:14:51,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 17:14:51,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 17:14:51,261 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 17:14:51,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 17:14:51,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 17:14:51,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 17:14:51,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 17:14:51,262 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 17:14:51,263 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 17:14:51,263 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 17:14:51,263 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 17:14:51,264 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 17:14:51,264 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 17:14:51,265 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 17:14:51,265 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 17:14:51,266 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 17:14:51,266 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-22 17:14:51,267 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 17:14:51,267 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 17:14:51,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 17:14:51,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 17:14:51,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 17:14:55,706 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 17:14:55,706 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 17:14:55,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:14:55 BoogieIcfgContainer [2020-08-22 17:14:55,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 17:14:55,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 17:14:55,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 17:14:55,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 17:14:55,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:14:47" (1/3) ... [2020-08-22 17:14:55,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14435724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:14:55, skipping insertion in model container [2020-08-22 17:14:55,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:50" (2/3) ... [2020-08-22 17:14:55,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14435724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:14:55, skipping insertion in model container [2020-08-22 17:14:55,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:14:55" (3/3) ... [2020-08-22 17:14:55,726 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-08-22 17:14:55,738 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 17:14:55,747 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-22 17:14:55,762 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-22 17:14:55,793 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 17:14:55,793 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 17:14:55,794 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 17:14:55,794 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 17:14:55,794 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 17:14:55,794 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 17:14:55,794 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 17:14:55,794 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 17:14:55,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states. [2020-08-22 17:14:55,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-08-22 17:14:55,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:55,888 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:55,889 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:55,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:55,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1064488228, now seen corresponding path program 1 times [2020-08-22 17:14:55,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:55,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122107798] [2020-08-22 17:14:55,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:59,187 WARN L193 SmtUtils]: Spent 869.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:14:59,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:59,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122107798] [2020-08-22 17:14:59,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:59,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:14:59,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101043467] [2020-08-22 17:14:59,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:14:59,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:59,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:14:59,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:14:59,605 INFO L87 Difference]: Start difference. First operand 1484 states. Second operand 5 states. [2020-08-22 17:15:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:16,211 INFO L93 Difference]: Finished difference Result 4394 states and 7936 transitions. [2020-08-22 17:15:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 17:15:16,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 484 [2020-08-22 17:15:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:16,270 INFO L225 Difference]: With dead ends: 4394 [2020-08-22 17:15:16,271 INFO L226 Difference]: Without dead ends: 2919 [2020-08-22 17:15:16,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:15:16,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2020-08-22 17:15:16,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2865. [2020-08-22 17:15:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2865 states. [2020-08-22 17:15:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4721 transitions. [2020-08-22 17:15:16,513 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4721 transitions. Word has length 484 [2020-08-22 17:15:16,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:16,518 INFO L479 AbstractCegarLoop]: Abstraction has 2865 states and 4721 transitions. [2020-08-22 17:15:16,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:15:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4721 transitions. [2020-08-22 17:15:16,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-08-22 17:15:16,535 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:16,535 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:16,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 17:15:16,536 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:16,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:16,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1721765960, now seen corresponding path program 1 times [2020-08-22 17:15:16,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:16,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278741521] [2020-08-22 17:15:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:18,348 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:15:18,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:18,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278741521] [2020-08-22 17:15:18,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:18,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:15:18,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335292784] [2020-08-22 17:15:18,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:15:18,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:18,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:15:18,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:18,751 INFO L87 Difference]: Start difference. First operand 2865 states and 4721 transitions. Second operand 4 states. [2020-08-22 17:15:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:38,218 INFO L93 Difference]: Finished difference Result 8316 states and 13666 transitions. [2020-08-22 17:15:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:15:38,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-08-22 17:15:38,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:38,257 INFO L225 Difference]: With dead ends: 8316 [2020-08-22 17:15:38,258 INFO L226 Difference]: Without dead ends: 5665 [2020-08-22 17:15:38,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:38,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2020-08-22 17:15:38,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5613. [2020-08-22 17:15:38,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5613 states. [2020-08-22 17:15:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5613 states to 5613 states and 9225 transitions. [2020-08-22 17:15:38,513 INFO L78 Accepts]: Start accepts. Automaton has 5613 states and 9225 transitions. Word has length 486 [2020-08-22 17:15:38,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:38,514 INFO L479 AbstractCegarLoop]: Abstraction has 5613 states and 9225 transitions. [2020-08-22 17:15:38,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:15:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5613 states and 9225 transitions. [2020-08-22 17:15:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-08-22 17:15:38,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:38,528 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:38,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 17:15:38,529 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:38,530 INFO L82 PathProgramCache]: Analyzing trace with hash 326918239, now seen corresponding path program 1 times [2020-08-22 17:15:38,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:38,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017547751] [2020-08-22 17:15:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:39,537 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:15:39,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:39,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017547751] [2020-08-22 17:15:39,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:39,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:15:39,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949554560] [2020-08-22 17:15:39,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:15:39,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:39,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:15:39,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:39,711 INFO L87 Difference]: Start difference. First operand 5613 states and 9225 transitions. Second operand 4 states. [2020-08-22 17:15:58,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:58,318 INFO L93 Difference]: Finished difference Result 16742 states and 27507 transitions. [2020-08-22 17:15:58,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:15:58,319 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-08-22 17:15:58,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:58,365 INFO L225 Difference]: With dead ends: 16742 [2020-08-22 17:15:58,365 INFO L226 Difference]: Without dead ends: 11181 [2020-08-22 17:15:58,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:58,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11181 states. [2020-08-22 17:15:58,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11181 to 5660. [2020-08-22 17:15:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5660 states. [2020-08-22 17:15:58,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5660 states to 5660 states and 9299 transitions. [2020-08-22 17:15:58,659 INFO L78 Accepts]: Start accepts. Automaton has 5660 states and 9299 transitions. Word has length 487 [2020-08-22 17:15:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:58,659 INFO L479 AbstractCegarLoop]: Abstraction has 5660 states and 9299 transitions. [2020-08-22 17:15:58,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:15:58,659 INFO L276 IsEmpty]: Start isEmpty. Operand 5660 states and 9299 transitions. [2020-08-22 17:15:58,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-08-22 17:15:58,673 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:58,674 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:58,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 17:15:58,674 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:58,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:58,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2064835293, now seen corresponding path program 1 times [2020-08-22 17:15:58,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:58,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144995610] [2020-08-22 17:15:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:59,938 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:15:59,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:16:00,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144995610] [2020-08-22 17:16:00,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:16:00,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:16:00,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075689631] [2020-08-22 17:16:00,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:16:00,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:16:00,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:16:00,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:16:00,258 INFO L87 Difference]: Start difference. First operand 5660 states and 9299 transitions. Second operand 4 states. [2020-08-22 17:16:19,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:16:19,384 INFO L93 Difference]: Finished difference Result 16304 states and 26694 transitions. [2020-08-22 17:16:19,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:16:19,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-08-22 17:16:19,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:16:19,429 INFO L225 Difference]: With dead ends: 16304 [2020-08-22 17:16:19,430 INFO L226 Difference]: Without dead ends: 11043 [2020-08-22 17:16:19,441 INFO L675 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 [2020-08-22 17:16:19,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2020-08-22 17:16:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10993. [2020-08-22 17:16:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10993 states. [2020-08-22 17:16:19,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10993 states to 10993 states and 17977 transitions. [2020-08-22 17:16:19,881 INFO L78 Accepts]: Start accepts. Automaton has 10993 states and 17977 transitions. Word has length 488 [2020-08-22 17:16:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:16:19,882 INFO L479 AbstractCegarLoop]: Abstraction has 10993 states and 17977 transitions. [2020-08-22 17:16:19,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:16:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 10993 states and 17977 transitions. [2020-08-22 17:16:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-08-22 17:16:19,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:16:19,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:16:19,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 17:16:19,913 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:16:19,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:16:19,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1928250536, now seen corresponding path program 1 times [2020-08-22 17:16:19,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:16:19,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964621034] [2020-08-22 17:16:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:16:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:20,886 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:16:20,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:16:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:16:21,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964621034] [2020-08-22 17:16:21,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:16:21,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:16:21,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362089000] [2020-08-22 17:16:21,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:16:21,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:16:21,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:16:21,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:16:21,074 INFO L87 Difference]: Start difference. First operand 10993 states and 17977 transitions. Second operand 4 states. [2020-08-22 17:16:41,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:16:41,036 INFO L93 Difference]: Finished difference Result 32723 states and 53486 transitions. [2020-08-22 17:16:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:16:41,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-08-22 17:16:41,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:16:41,089 INFO L225 Difference]: With dead ends: 32723 [2020-08-22 17:16:41,090 INFO L226 Difference]: Without dead ends: 21874 [2020-08-22 17:16:41,114 INFO L675 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 [2020-08-22 17:16:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21874 states. [2020-08-22 17:16:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21874 to 11091. [2020-08-22 17:16:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11091 states. [2020-08-22 17:16:41,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11091 states to 11091 states and 18128 transitions. [2020-08-22 17:16:41,621 INFO L78 Accepts]: Start accepts. Automaton has 11091 states and 18128 transitions. Word has length 488 [2020-08-22 17:16:41,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:16:41,621 INFO L479 AbstractCegarLoop]: Abstraction has 11091 states and 18128 transitions. [2020-08-22 17:16:41,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:16:41,621 INFO L276 IsEmpty]: Start isEmpty. Operand 11091 states and 18128 transitions. [2020-08-22 17:16:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-08-22 17:16:41,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:16:41,648 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:16:41,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 17:16:41,649 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:16:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:16:41,650 INFO L82 PathProgramCache]: Analyzing trace with hash 844567664, now seen corresponding path program 1 times [2020-08-22 17:16:41,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:16:41,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516606421] [2020-08-22 17:16:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:16:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:42,711 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:16:42,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:16:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:16:42,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516606421] [2020-08-22 17:16:42,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:16:42,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:16:42,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440106116] [2020-08-22 17:16:42,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:16:42,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:16:42,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:16:42,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:16:42,928 INFO L87 Difference]: Start difference. First operand 11091 states and 18128 transitions. Second operand 4 states. [2020-08-22 17:17:03,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:17:03,662 INFO L93 Difference]: Finished difference Result 32858 states and 53667 transitions. [2020-08-22 17:17:03,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:17:03,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-08-22 17:17:03,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:17:03,705 INFO L225 Difference]: With dead ends: 32858 [2020-08-22 17:17:03,705 INFO L226 Difference]: Without dead ends: 21991 [2020-08-22 17:17:03,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:17:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21991 states. [2020-08-22 17:17:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21991 to 11208. [2020-08-22 17:17:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11208 states. [2020-08-22 17:17:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11208 states to 11208 states and 18274 transitions. [2020-08-22 17:17:04,307 INFO L78 Accepts]: Start accepts. Automaton has 11208 states and 18274 transitions. Word has length 489 [2020-08-22 17:17:04,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:17:04,307 INFO L479 AbstractCegarLoop]: Abstraction has 11208 states and 18274 transitions. [2020-08-22 17:17:04,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:17:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 11208 states and 18274 transitions. [2020-08-22 17:17:04,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-08-22 17:17:04,326 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:17:04,327 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:17:04,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 17:17:04,327 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:17:04,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:17:04,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2127508510, now seen corresponding path program 1 times [2020-08-22 17:17:04,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:17:04,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669657004] [2020-08-22 17:17:04,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:17:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:05,690 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:17:05,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:17:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:17:05,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669657004] [2020-08-22 17:17:05,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:17:05,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:17:05,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475143068] [2020-08-22 17:17:05,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:17:05,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:17:05,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:17:05,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:17:05,891 INFO L87 Difference]: Start difference. First operand 11208 states and 18274 transitions. Second operand 4 states. [2020-08-22 17:17:19,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:17:19,936 INFO L93 Difference]: Finished difference Result 21557 states and 34732 transitions. [2020-08-22 17:17:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:17:19,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-08-22 17:17:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:17:19,965 INFO L225 Difference]: With dead ends: 21557 [2020-08-22 17:17:19,965 INFO L226 Difference]: Without dead ends: 14874 [2020-08-22 17:17:19,978 INFO L675 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 [2020-08-22 17:17:19,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14874 states. [2020-08-22 17:17:20,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14874 to 12752. [2020-08-22 17:17:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12752 states. [2020-08-22 17:17:20,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12752 states to 12752 states and 20834 transitions. [2020-08-22 17:17:20,451 INFO L78 Accepts]: Start accepts. Automaton has 12752 states and 20834 transitions. Word has length 490 [2020-08-22 17:17:20,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:17:20,452 INFO L479 AbstractCegarLoop]: Abstraction has 12752 states and 20834 transitions. [2020-08-22 17:17:20,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:17:20,452 INFO L276 IsEmpty]: Start isEmpty. Operand 12752 states and 20834 transitions. [2020-08-22 17:17:20,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-08-22 17:17:20,465 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:17:20,465 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:17:20,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 17:17:20,466 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:17:20,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:17:20,466 INFO L82 PathProgramCache]: Analyzing trace with hash -667258338, now seen corresponding path program 1 times [2020-08-22 17:17:20,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:17:20,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134460775] [2020-08-22 17:17:20,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:17:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:22,057 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:17:22,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:17:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:17:22,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134460775] [2020-08-22 17:17:22,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:17:22,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:17:22,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771115188] [2020-08-22 17:17:22,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:17:22,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:17:22,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:17:22,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:17:22,512 INFO L87 Difference]: Start difference. First operand 12752 states and 20834 transitions. Second operand 4 states. [2020-08-22 17:17:43,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:17:43,870 INFO L93 Difference]: Finished difference Result 36492 states and 59503 transitions. [2020-08-22 17:17:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:17:43,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-08-22 17:17:43,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:17:43,905 INFO L225 Difference]: With dead ends: 36492 [2020-08-22 17:17:43,905 INFO L226 Difference]: Without dead ends: 24709 [2020-08-22 17:17:43,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:17:43,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24709 states. [2020-08-22 17:17:44,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24709 to 24661. [2020-08-22 17:17:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24661 states. [2020-08-22 17:17:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 40123 transitions. [2020-08-22 17:17:44,824 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 40123 transitions. Word has length 490 [2020-08-22 17:17:44,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:17:44,824 INFO L479 AbstractCegarLoop]: Abstraction has 24661 states and 40123 transitions. [2020-08-22 17:17:44,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:17:44,825 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 40123 transitions. [2020-08-22 17:17:44,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-08-22 17:17:44,849 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:17:44,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:17:44,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 17:17:44,849 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:17:44,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:17:44,850 INFO L82 PathProgramCache]: Analyzing trace with hash 656055547, now seen corresponding path program 1 times [2020-08-22 17:17:44,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:17:44,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503574112] [2020-08-22 17:17:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:17:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:47,282 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:17:47,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:17:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:17:47,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503574112] [2020-08-22 17:17:47,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:17:47,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:17:47,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522606583] [2020-08-22 17:17:47,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:17:47,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:17:47,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:17:47,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:17:47,557 INFO L87 Difference]: Start difference. First operand 24661 states and 40123 transitions. Second operand 5 states. [2020-08-22 17:18:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:18:07,869 INFO L93 Difference]: Finished difference Result 57139 states and 93438 transitions. [2020-08-22 17:18:07,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:18:07,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 490 [2020-08-22 17:18:07,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:18:07,908 INFO L225 Difference]: With dead ends: 57139 [2020-08-22 17:18:07,909 INFO L226 Difference]: Without dead ends: 29180 [2020-08-22 17:18:07,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:18:07,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29180 states. [2020-08-22 17:18:10,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29180 to 29123. [2020-08-22 17:18:10,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29123 states. [2020-08-22 17:18:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29123 states to 29123 states and 47478 transitions. [2020-08-22 17:18:10,126 INFO L78 Accepts]: Start accepts. Automaton has 29123 states and 47478 transitions. Word has length 490 [2020-08-22 17:18:10,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:18:10,127 INFO L479 AbstractCegarLoop]: Abstraction has 29123 states and 47478 transitions. [2020-08-22 17:18:10,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:18:10,127 INFO L276 IsEmpty]: Start isEmpty. Operand 29123 states and 47478 transitions. [2020-08-22 17:18:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-08-22 17:18:10,149 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:18:10,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:18:10,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 17:18:10,150 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:18:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:18:10,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1697744443, now seen corresponding path program 1 times [2020-08-22 17:18:10,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:18:10,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832360815] [2020-08-22 17:18:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:18:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:18:11,338 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:18:11,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:18:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:18:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:18:11,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832360815] [2020-08-22 17:18:11,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:18:11,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:18:11,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211197517] [2020-08-22 17:18:11,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:18:11,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:18:11,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:18:11,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:18:11,855 INFO L87 Difference]: Start difference. First operand 29123 states and 47478 transitions. Second operand 4 states. [2020-08-22 17:18:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:18:35,252 INFO L93 Difference]: Finished difference Result 85361 states and 139207 transitions. [2020-08-22 17:18:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:18:35,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-08-22 17:18:35,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:18:35,322 INFO L225 Difference]: With dead ends: 85361 [2020-08-22 17:18:35,323 INFO L226 Difference]: Without dead ends: 57258 [2020-08-22 17:18:35,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:18:35,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57258 states. [2020-08-22 17:18:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57258 to 57219. [2020-08-22 17:18:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57219 states. [2020-08-22 17:18:37,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57219 states to 57219 states and 92958 transitions. [2020-08-22 17:18:37,587 INFO L78 Accepts]: Start accepts. Automaton has 57219 states and 92958 transitions. Word has length 492 [2020-08-22 17:18:37,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:18:37,587 INFO L479 AbstractCegarLoop]: Abstraction has 57219 states and 92958 transitions. [2020-08-22 17:18:37,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:18:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 57219 states and 92958 transitions. [2020-08-22 17:18:37,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-08-22 17:18:37,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:18:37,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:18:37,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 17:18:37,647 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:18:37,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:18:37,648 INFO L82 PathProgramCache]: Analyzing trace with hash 12438715, now seen corresponding path program 1 times [2020-08-22 17:18:37,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:18:37,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012494640] [2020-08-22 17:18:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:18:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:18:39,116 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:18:39,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:18:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:18:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:18:39,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012494640] [2020-08-22 17:18:39,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:18:39,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:18:39,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91633073] [2020-08-22 17:18:39,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:18:39,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:18:39,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:18:39,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:18:39,293 INFO L87 Difference]: Start difference. First operand 57219 states and 92958 transitions. Second operand 4 states. [2020-08-22 17:18:57,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:18:57,083 INFO L93 Difference]: Finished difference Result 104837 states and 168893 transitions. [2020-08-22 17:18:57,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:18:57,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-08-22 17:18:57,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:18:57,166 INFO L225 Difference]: With dead ends: 104837 [2020-08-22 17:18:57,166 INFO L226 Difference]: Without dead ends: 74643 [2020-08-22 17:18:57,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:18:57,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74643 states. [2020-08-22 17:19:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74643 to 68099. [2020-08-22 17:19:00,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68099 states. [2020-08-22 17:19:00,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68099 states to 68099 states and 110830 transitions. [2020-08-22 17:19:00,197 INFO L78 Accepts]: Start accepts. Automaton has 68099 states and 110830 transitions. Word has length 492 [2020-08-22 17:19:00,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:19:00,198 INFO L479 AbstractCegarLoop]: Abstraction has 68099 states and 110830 transitions. [2020-08-22 17:19:00,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:19:00,198 INFO L276 IsEmpty]: Start isEmpty. Operand 68099 states and 110830 transitions. [2020-08-22 17:19:00,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-08-22 17:19:00,236 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:19:00,237 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:19:00,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 17:19:00,237 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:19:00,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:19:00,238 INFO L82 PathProgramCache]: Analyzing trace with hash 888450607, now seen corresponding path program 1 times [2020-08-22 17:19:00,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:19:00,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691810691] [2020-08-22 17:19:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:19:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:19:01,482 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:19:01,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:19:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:19:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:19:01,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691810691] [2020-08-22 17:19:01,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:19:01,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:19:01,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005229755] [2020-08-22 17:19:01,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 17:19:01,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:19:01,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 17:19:01,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:19:01,856 INFO L87 Difference]: Start difference. First operand 68099 states and 110830 transitions. Second operand 6 states. [2020-08-22 17:19:03,851 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification that was a NOOP. DAG size: 412 [2020-08-22 17:19:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:19:18,245 INFO L93 Difference]: Finished difference Result 111717 states and 180182 transitions. [2020-08-22 17:19:18,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 17:19:18,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 493 [2020-08-22 17:19:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:19:18,322 INFO L225 Difference]: With dead ends: 111717 [2020-08-22 17:19:18,322 INFO L226 Difference]: Without dead ends: 68099 [2020-08-22 17:19:18,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-22 17:19:18,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68099 states. [2020-08-22 17:19:21,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68099 to 68099. [2020-08-22 17:19:21,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68099 states. [2020-08-22 17:19:21,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68099 states to 68099 states and 110214 transitions. [2020-08-22 17:19:21,517 INFO L78 Accepts]: Start accepts. Automaton has 68099 states and 110214 transitions. Word has length 493 [2020-08-22 17:19:21,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:19:21,518 INFO L479 AbstractCegarLoop]: Abstraction has 68099 states and 110214 transitions. [2020-08-22 17:19:21,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 17:19:21,518 INFO L276 IsEmpty]: Start isEmpty. Operand 68099 states and 110214 transitions. [2020-08-22 17:19:21,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-08-22 17:19:21,575 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:19:21,576 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:19:21,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 17:19:21,576 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:19:21,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:19:21,577 INFO L82 PathProgramCache]: Analyzing trace with hash -973547532, now seen corresponding path program 1 times [2020-08-22 17:19:21,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:19:21,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889647206] [2020-08-22 17:19:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:19:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:19:22,976 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:19:22,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:19:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:19:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:19:23,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889647206] [2020-08-22 17:19:23,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:19:23,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 17:19:23,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336172858] [2020-08-22 17:19:23,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 17:19:23,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:19:23,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 17:19:23,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 17:19:23,308 INFO L87 Difference]: Start difference. First operand 68099 states and 110214 transitions. Second operand 9 states. [2020-08-22 17:19:24,219 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 411 [2020-08-22 17:19:48,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:19:48,542 INFO L93 Difference]: Finished difference Result 152158 states and 244257 transitions. [2020-08-22 17:19:48,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 17:19:48,543 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 493 [2020-08-22 17:19:48,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:19:48,668 INFO L225 Difference]: With dead ends: 152158 [2020-08-22 17:19:48,668 INFO L226 Difference]: Without dead ends: 109692 [2020-08-22 17:19:48,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-08-22 17:19:48,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109692 states. [2020-08-22 17:19:52,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109692 to 80075. [2020-08-22 17:19:52,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80075 states. [2020-08-22 17:19:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80075 states to 80075 states and 127414 transitions. [2020-08-22 17:19:52,673 INFO L78 Accepts]: Start accepts. Automaton has 80075 states and 127414 transitions. Word has length 493 [2020-08-22 17:19:52,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:19:52,674 INFO L479 AbstractCegarLoop]: Abstraction has 80075 states and 127414 transitions. [2020-08-22 17:19:52,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 17:19:52,674 INFO L276 IsEmpty]: Start isEmpty. Operand 80075 states and 127414 transitions. [2020-08-22 17:19:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-08-22 17:19:52,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:19:52,718 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:19:52,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 17:19:52,719 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:19:52,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:19:52,719 INFO L82 PathProgramCache]: Analyzing trace with hash -128473503, now seen corresponding path program 1 times [2020-08-22 17:19:52,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:19:52,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878405021] [2020-08-22 17:19:52,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:19:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:19:55,785 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:19:55,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:19:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:19:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:19:56,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878405021] [2020-08-22 17:19:56,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:19:56,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:19:56,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289275434] [2020-08-22 17:19:56,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:19:56,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:19:56,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:19:56,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:19:56,044 INFO L87 Difference]: Start difference. First operand 80075 states and 127414 transitions. Second operand 5 states. [2020-08-22 17:20:22,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:20:22,892 INFO L93 Difference]: Finished difference Result 234380 states and 373059 transitions. [2020-08-22 17:20:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:20:22,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-08-22 17:20:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:20:23,081 INFO L225 Difference]: With dead ends: 234380 [2020-08-22 17:20:23,082 INFO L226 Difference]: Without dead ends: 155741 [2020-08-22 17:20:23,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:20:23,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155741 states. [2020-08-22 17:20:33,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155741 to 155695. [2020-08-22 17:20:33,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155695 states. [2020-08-22 17:20:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155695 states to 155695 states and 247126 transitions. [2020-08-22 17:20:33,351 INFO L78 Accepts]: Start accepts. Automaton has 155695 states and 247126 transitions. Word has length 493 [2020-08-22 17:20:33,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:20:33,351 INFO L479 AbstractCegarLoop]: Abstraction has 155695 states and 247126 transitions. [2020-08-22 17:20:33,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:20:33,351 INFO L276 IsEmpty]: Start isEmpty. Operand 155695 states and 247126 transitions. [2020-08-22 17:20:33,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-08-22 17:20:33,442 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:20:33,442 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:20:33,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 17:20:33,443 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:20:33,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:20:33,443 INFO L82 PathProgramCache]: Analyzing trace with hash -983128544, now seen corresponding path program 1 times [2020-08-22 17:20:33,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:20:33,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724521564] [2020-08-22 17:20:33,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:20:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:20:36,855 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:20:36,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:20:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:20:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:20:37,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724521564] [2020-08-22 17:20:37,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:20:37,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:20:37,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641946085] [2020-08-22 17:20:37,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:20:37,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:20:37,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:20:37,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:20:37,108 INFO L87 Difference]: Start difference. First operand 155695 states and 247126 transitions. Second operand 4 states. [2020-08-22 17:21:17,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:21:17,881 INFO L93 Difference]: Finished difference Result 457347 states and 724775 transitions. [2020-08-22 17:21:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:21:17,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2020-08-22 17:21:17,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:21:18,240 INFO L225 Difference]: With dead ends: 457347 [2020-08-22 17:21:18,241 INFO L226 Difference]: Without dead ends: 306331 [2020-08-22 17:21:18,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:21:18,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306331 states. [2020-08-22 17:21:43,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306331 to 306294. [2020-08-22 17:21:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306294 states. [2020-08-22 17:21:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306294 states to 306294 states and 484194 transitions. [2020-08-22 17:21:44,186 INFO L78 Accepts]: Start accepts. Automaton has 306294 states and 484194 transitions. Word has length 494 [2020-08-22 17:21:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:21:44,187 INFO L479 AbstractCegarLoop]: Abstraction has 306294 states and 484194 transitions. [2020-08-22 17:21:44,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:21:44,187 INFO L276 IsEmpty]: Start isEmpty. Operand 306294 states and 484194 transitions. [2020-08-22 17:21:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-08-22 17:21:44,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:21:44,377 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:21:44,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 17:21:44,377 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:21:44,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:21:44,378 INFO L82 PathProgramCache]: Analyzing trace with hash 622715965, now seen corresponding path program 1 times [2020-08-22 17:21:44,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:21:44,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106337421] [2020-08-22 17:21:44,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:21:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:21:46,227 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:21:46,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:21:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:21:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:21:46,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106337421] [2020-08-22 17:21:46,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:21:46,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:21:46,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017211535] [2020-08-22 17:21:46,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:21:46,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:21:46,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:21:46,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:21:46,372 INFO L87 Difference]: Start difference. First operand 306294 states and 484194 transitions. Second operand 5 states. [2020-08-22 17:22:35,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:22:35,019 INFO L93 Difference]: Finished difference Result 705643 states and 1120116 transitions. [2020-08-22 17:22:35,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:22:35,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 494 [2020-08-22 17:22:35,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:22:35,447 INFO L225 Difference]: With dead ends: 705643 [2020-08-22 17:22:35,448 INFO L226 Difference]: Without dead ends: 355699 [2020-08-22 17:22:35,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:22:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355699 states. [2020-08-22 17:23:06,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355699 to 355585. [2020-08-22 17:23:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355585 states. [2020-08-22 17:23:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355585 states to 355585 states and 562997 transitions. [2020-08-22 17:23:06,999 INFO L78 Accepts]: Start accepts. Automaton has 355585 states and 562997 transitions. Word has length 494 [2020-08-22 17:23:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:23:07,000 INFO L479 AbstractCegarLoop]: Abstraction has 355585 states and 562997 transitions. [2020-08-22 17:23:07,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:23:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 355585 states and 562997 transitions. [2020-08-22 17:23:07,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-08-22 17:23:07,244 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:23:07,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:23:07,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 17:23:07,245 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:23:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:23:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash -340986835, now seen corresponding path program 1 times [2020-08-22 17:23:07,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:23:07,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393418422] [2020-08-22 17:23:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:23:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:23:08,351 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:23:08,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:23:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:23:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:23:09,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393418422] [2020-08-22 17:23:09,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:23:09,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:23:09,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899581190] [2020-08-22 17:23:09,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:23:09,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:23:09,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:23:09,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:23:09,064 INFO L87 Difference]: Start difference. First operand 355585 states and 562997 transitions. Second operand 4 states. [2020-08-22 17:24:23,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:24:23,134 INFO L93 Difference]: Finished difference Result 1034474 states and 1635100 transitions. [2020-08-22 17:24:23,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:24:23,136 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-08-22 17:24:23,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:24:24,114 INFO L225 Difference]: With dead ends: 1034474 [2020-08-22 17:24:24,114 INFO L226 Difference]: Without dead ends: 694238 [2020-08-22 17:24:24,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:24:24,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694238 states. [2020-08-22 17:25:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694238 to 694192. [2020-08-22 17:25:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694192 states. [2020-08-22 17:25:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694192 states to 694192 states and 1094663 transitions. [2020-08-22 17:25:27,778 INFO L78 Accepts]: Start accepts. Automaton has 694192 states and 1094663 transitions. Word has length 495 [2020-08-22 17:25:27,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:25:27,779 INFO L479 AbstractCegarLoop]: Abstraction has 694192 states and 1094663 transitions. [2020-08-22 17:25:27,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:25:27,779 INFO L276 IsEmpty]: Start isEmpty. Operand 694192 states and 1094663 transitions. [2020-08-22 17:25:37,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-08-22 17:25:37,029 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:25:37,030 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:25:37,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 17:25:37,030 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:25:37,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:25:37,030 INFO L82 PathProgramCache]: Analyzing trace with hash -107201451, now seen corresponding path program 1 times [2020-08-22 17:25:37,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:25:37,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407207878] [2020-08-22 17:25:37,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:25:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:25:38,363 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:25:38,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:25:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:25:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:25:38,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407207878] [2020-08-22 17:25:38,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:25:38,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:25:38,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892060487] [2020-08-22 17:25:38,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:25:38,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:25:38,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:25:38,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:25:38,524 INFO L87 Difference]: Start difference. First operand 694192 states and 1094663 transitions. Second operand 5 states.