/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.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 14:06:07,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 14:06:07,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 14:06:07,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 14:06:07,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 14:06:07,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 14:06:07,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 14:06:07,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 14:06:07,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 14:06:07,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 14:06:07,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 14:06:07,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 14:06:07,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 14:06:07,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 14:06:07,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 14:06:07,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 14:06:07,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 14:06:07,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 14:06:07,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 14:06:07,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 14:06:07,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 14:06:07,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 14:06:07,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 14:06:07,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 14:06:07,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 14:06:07,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 14:06:07,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 14:06:07,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 14:06:07,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 14:06:07,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 14:06:07,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 14:06:07,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 14:06:07,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 14:06:07,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 14:06:07,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 14:06:07,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 14:06:07,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 14:06:07,654 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 14:06:07,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 14:06:07,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 14:06:07,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 14:06:07,656 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 14:06:07,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 14:06:07,657 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 14:06:07,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 14:06:07,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 14:06:07,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 14:06:07,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 14:06:07,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 14:06:07,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 14:06:07,658 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 14:06:07,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 14:06:07,659 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 14:06:07,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 14:06:07,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 14:06:07,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 14:06:07,659 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 14:06:07,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 14:06:07,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 14:06:07,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 14:06:07,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 14:06:07,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 14:06:07,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 14:06:07,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 14:06:07,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 14:06:07,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 14:06:07,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 14:06:08,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 14:06:08,155 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 14:06:08,162 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 14:06:08,164 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 14:06:08,164 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 14:06:08,166 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-04 14:06:08,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/777998ac4/9b8330aa9f3844c0afbce6a9ee5b4042/FLAG8524579a5 [2020-09-04 14:06:09,072 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 14:06:09,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-04 14:06:09,107 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/777998ac4/9b8330aa9f3844c0afbce6a9ee5b4042/FLAG8524579a5 [2020-09-04 14:06:09,613 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/777998ac4/9b8330aa9f3844c0afbce6a9ee5b4042 [2020-09-04 14:06:09,641 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 14:06:09,644 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 14:06:09,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 14:06:09,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 14:06:09,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 14:06:09,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 02:06:09" (1/1) ... [2020-09-04 14:06:09,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec871e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:06:09, skipping insertion in model container [2020-09-04 14:06:09,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 02:06:09" (1/1) ... [2020-09-04 14:06:09,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 14:06:09,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 14:06:11,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 14:06:11,587 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 14:06:13,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 14:06:13,414 INFO L208 MainTranslator]: Completed translation [2020-09-04 14:06:13,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:06:13 WrapperNode [2020-09-04 14:06:13,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 14:06:13,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 14:06:13,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 14:06:13,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 14:06:13,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:06:13" (1/1) ... [2020-09-04 14:06:13,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:06:13" (1/1) ... [2020-09-04 14:06:13,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:06:13" (1/1) ... [2020-09-04 14:06:13,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:06:13" (1/1) ... [2020-09-04 14:06:13,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:06:13" (1/1) ... [2020-09-04 14:06:13,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:06:13" (1/1) ... [2020-09-04 14:06:13,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:06:13" (1/1) ... [2020-09-04 14:06:13,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 14:06:13,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 14:06:13,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 14:06:13,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 14:06:13,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:06:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 14:06:13,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 14:06:13,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 14:06:13,753 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 14:06:13,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 14:06:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 14:06:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-04 14:06:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-04 14:06:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-04 14:06:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-04 14:06:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 14:06:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 14:06:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-04 14:06:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-04 14:06:13,761 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-04 14:06:13,762 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-04 14:06:13,763 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-04 14:06:13,763 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-04 14:06:13,763 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-04 14:06:13,764 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-04 14:06:13,764 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 14:06:13,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 14:06:13,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 14:06:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 14:06:18,724 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 14:06:18,725 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 14:06:18,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 02:06:18 BoogieIcfgContainer [2020-09-04 14:06:18,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 14:06:18,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 14:06:18,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 14:06:18,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 14:06:18,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 02:06:09" (1/3) ... [2020-09-04 14:06:18,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26556781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 02:06:18, skipping insertion in model container [2020-09-04 14:06:18,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:06:13" (2/3) ... [2020-09-04 14:06:18,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26556781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 02:06:18, skipping insertion in model container [2020-09-04 14:06:18,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 02:06:18" (3/3) ... [2020-09-04 14:06:18,749 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-04 14:06:18,759 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 14:06:18,770 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-09-04 14:06:18,790 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-04 14:06:18,825 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 14:06:18,825 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 14:06:18,825 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 14:06:18,825 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 14:06:18,825 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 14:06:18,825 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 14:06:18,825 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 14:06:18,826 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 14:06:18,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states. [2020-09-04 14:06:18,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-09-04 14:06:18,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:06:18,931 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] [2020-09-04 14:06:18,932 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:06:18,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:06:18,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1738290825, now seen corresponding path program 1 times [2020-09-04 14:06:18,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:06:18,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538079896] [2020-09-04 14:06:18,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:06:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:23,110 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:06:23,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:06:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:06:24,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538079896] [2020-09-04 14:06:24,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:06:24,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:06:24,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609960156] [2020-09-04 14:06:24,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:06:24,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:06:24,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:06:24,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:06:24,217 INFO L87 Difference]: Start difference. First operand 1506 states. Second operand 5 states. [2020-09-04 14:06:43,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:06:43,060 INFO L93 Difference]: Finished difference Result 4460 states and 8053 transitions. [2020-09-04 14:06:43,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 14:06:43,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-09-04 14:06:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:06:43,106 INFO L225 Difference]: With dead ends: 4460 [2020-09-04 14:06:43,106 INFO L226 Difference]: Without dead ends: 2963 [2020-09-04 14:06:43,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:06:43,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2020-09-04 14:06:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2906. [2020-09-04 14:06:43,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2906 states. [2020-09-04 14:06:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4772 transitions. [2020-09-04 14:06:43,359 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 4772 transitions. Word has length 493 [2020-09-04 14:06:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:06:43,361 INFO L479 AbstractCegarLoop]: Abstraction has 2906 states and 4772 transitions. [2020-09-04 14:06:43,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:06:43,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 4772 transitions. [2020-09-04 14:06:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-09-04 14:06:43,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:06:43,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:06:43,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 14:06:43,379 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:06:43,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:06:43,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1236769392, now seen corresponding path program 1 times [2020-09-04 14:06:43,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:06:43,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876698273] [2020-09-04 14:06:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:06:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:45,293 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:06:45,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:06:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:06:45,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876698273] [2020-09-04 14:06:45,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:06:45,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:06:45,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591378207] [2020-09-04 14:06:45,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:06:45,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:06:45,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:06:45,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:06:45,880 INFO L87 Difference]: Start difference. First operand 2906 states and 4772 transitions. Second operand 4 states. [2020-09-04 14:07:07,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:07:07,090 INFO L93 Difference]: Finished difference Result 8439 states and 13819 transitions. [2020-09-04 14:07:07,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:07:07,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-09-04 14:07:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:07:07,126 INFO L225 Difference]: With dead ends: 8439 [2020-09-04 14:07:07,127 INFO L226 Difference]: Without dead ends: 5747 [2020-09-04 14:07:07,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:07:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2020-09-04 14:07:07,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5692. [2020-09-04 14:07:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5692 states. [2020-09-04 14:07:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 9324 transitions. [2020-09-04 14:07:07,364 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 9324 transitions. Word has length 495 [2020-09-04 14:07:07,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:07:07,366 INFO L479 AbstractCegarLoop]: Abstraction has 5692 states and 9324 transitions. [2020-09-04 14:07:07,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:07:07,367 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 9324 transitions. [2020-09-04 14:07:07,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-09-04 14:07:07,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:07:07,385 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] [2020-09-04 14:07:07,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 14:07:07,386 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:07:07,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:07:07,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1780546784, now seen corresponding path program 1 times [2020-09-04 14:07:07,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:07:07,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881244232] [2020-09-04 14:07:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:07:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:07:08,689 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:07:08,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:07:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:07:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:07:08,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881244232] [2020-09-04 14:07:08,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:07:08,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:07:08,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356975544] [2020-09-04 14:07:08,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:07:08,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:07:08,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:07:08,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:07:08,902 INFO L87 Difference]: Start difference. First operand 5692 states and 9324 transitions. Second operand 4 states. [2020-09-04 14:07:30,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:07:30,452 INFO L93 Difference]: Finished difference Result 16979 states and 27804 transitions. [2020-09-04 14:07:30,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:07:30,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-09-04 14:07:30,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:07:30,506 INFO L225 Difference]: With dead ends: 16979 [2020-09-04 14:07:30,507 INFO L226 Difference]: Without dead ends: 11339 [2020-09-04 14:07:30,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:07:30,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11339 states. [2020-09-04 14:07:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11339 to 5739. [2020-09-04 14:07:30,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5739 states. [2020-09-04 14:07:30,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5739 states to 5739 states and 9398 transitions. [2020-09-04 14:07:30,842 INFO L78 Accepts]: Start accepts. Automaton has 5739 states and 9398 transitions. Word has length 496 [2020-09-04 14:07:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:07:30,842 INFO L479 AbstractCegarLoop]: Abstraction has 5739 states and 9398 transitions. [2020-09-04 14:07:30,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:07:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 5739 states and 9398 transitions. [2020-09-04 14:07:30,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-09-04 14:07:30,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:07:30,859 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, 1] [2020-09-04 14:07:30,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 14:07:30,859 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:07:30,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:07:30,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1430972427, now seen corresponding path program 1 times [2020-09-04 14:07:30,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:07:30,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327111775] [2020-09-04 14:07:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:07:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:07:32,400 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:07:32,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:07:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:07:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:07:32,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327111775] [2020-09-04 14:07:32,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:07:32,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:07:32,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100181989] [2020-09-04 14:07:32,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:07:32,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:07:32,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:07:32,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:07:32,686 INFO L87 Difference]: Start difference. First operand 5739 states and 9398 transitions. Second operand 4 states. [2020-09-04 14:07:54,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:07:54,149 INFO L93 Difference]: Finished difference Result 16541 states and 26991 transitions. [2020-09-04 14:07:54,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:07:54,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-09-04 14:07:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:07:54,186 INFO L225 Difference]: With dead ends: 16541 [2020-09-04 14:07:54,186 INFO L226 Difference]: Without dead ends: 11201 [2020-09-04 14:07:54,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:07:54,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11201 states. [2020-09-04 14:07:54,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11201 to 11148. [2020-09-04 14:07:54,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11148 states. [2020-09-04 14:07:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11148 states to 11148 states and 18172 transitions. [2020-09-04 14:07:54,606 INFO L78 Accepts]: Start accepts. Automaton has 11148 states and 18172 transitions. Word has length 497 [2020-09-04 14:07:54,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:07:54,607 INFO L479 AbstractCegarLoop]: Abstraction has 11148 states and 18172 transitions. [2020-09-04 14:07:54,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:07:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand 11148 states and 18172 transitions. [2020-09-04 14:07:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-09-04 14:07:54,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:07:54,634 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, 1] [2020-09-04 14:07:54,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 14:07:54,635 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:07:54,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:07:54,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1060694512, now seen corresponding path program 1 times [2020-09-04 14:07:54,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:07:54,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83459745] [2020-09-04 14:07:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:07:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:07:55,958 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:07:55,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:07:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:07:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:07:56,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83459745] [2020-09-04 14:07:56,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:07:56,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:07:56,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194782763] [2020-09-04 14:07:56,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:07:56,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:07:56,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:07:56,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:07:56,166 INFO L87 Difference]: Start difference. First operand 11148 states and 18172 transitions. Second operand 4 states. [2020-09-04 14:08:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:08:18,900 INFO L93 Difference]: Finished difference Result 33188 states and 54071 transitions. [2020-09-04 14:08:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:08:18,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-09-04 14:08:18,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:08:18,950 INFO L225 Difference]: With dead ends: 33188 [2020-09-04 14:08:18,950 INFO L226 Difference]: Without dead ends: 22184 [2020-09-04 14:08:18,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:08:19,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22184 states. [2020-09-04 14:08:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22184 to 11246. [2020-09-04 14:08:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11246 states. [2020-09-04 14:08:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11246 states to 11246 states and 18323 transitions. [2020-09-04 14:08:19,543 INFO L78 Accepts]: Start accepts. Automaton has 11246 states and 18323 transitions. Word has length 497 [2020-09-04 14:08:19,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:08:19,543 INFO L479 AbstractCegarLoop]: Abstraction has 11246 states and 18323 transitions. [2020-09-04 14:08:19,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:08:19,543 INFO L276 IsEmpty]: Start isEmpty. Operand 11246 states and 18323 transitions. [2020-09-04 14:08:19,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-09-04 14:08:19,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:08:19,566 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, 1, 1] [2020-09-04 14:08:19,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 14:08:19,567 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:08:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:08:19,567 INFO L82 PathProgramCache]: Analyzing trace with hash -2017069745, now seen corresponding path program 1 times [2020-09-04 14:08:19,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:08:19,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840877092] [2020-09-04 14:08:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:08:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:20,756 WARN L193 SmtUtils]: Spent 937.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:08:20,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:08:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:08:20,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840877092] [2020-09-04 14:08:20,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:08:20,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:08:20,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847652361] [2020-09-04 14:08:20,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:08:20,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:08:20,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:08:20,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:08:20,994 INFO L87 Difference]: Start difference. First operand 11246 states and 18323 transitions. Second operand 4 states. [2020-09-04 14:08:43,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:08:43,704 INFO L93 Difference]: Finished difference Result 33323 states and 54252 transitions. [2020-09-04 14:08:43,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:08:43,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-09-04 14:08:43,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:08:43,747 INFO L225 Difference]: With dead ends: 33323 [2020-09-04 14:08:43,748 INFO L226 Difference]: Without dead ends: 22301 [2020-09-04 14:08:43,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:08:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22301 states. [2020-09-04 14:08:44,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22301 to 11363. [2020-09-04 14:08:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11363 states. [2020-09-04 14:08:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11363 states to 11363 states and 18469 transitions. [2020-09-04 14:08:44,407 INFO L78 Accepts]: Start accepts. Automaton has 11363 states and 18469 transitions. Word has length 498 [2020-09-04 14:08:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:08:44,407 INFO L479 AbstractCegarLoop]: Abstraction has 11363 states and 18469 transitions. [2020-09-04 14:08:44,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:08:44,407 INFO L276 IsEmpty]: Start isEmpty. Operand 11363 states and 18469 transitions. [2020-09-04 14:08:44,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-09-04 14:08:44,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:08:44,422 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, 1, 1, 1] [2020-09-04 14:08:44,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 14:08:44,422 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:08:44,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:08:44,423 INFO L82 PathProgramCache]: Analyzing trace with hash -199707613, now seen corresponding path program 1 times [2020-09-04 14:08:44,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:08:44,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082651886] [2020-09-04 14:08:44,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:08:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:45,799 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:08:45,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:08:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:08:46,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082651886] [2020-09-04 14:08:46,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:08:46,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:08:46,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449452119] [2020-09-04 14:08:46,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:08:46,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:08:46,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:08:46,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:08:46,027 INFO L87 Difference]: Start difference. First operand 11363 states and 18469 transitions. Second operand 4 states. [2020-09-04 14:09:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:09:01,629 INFO L93 Difference]: Finished difference Result 21947 states and 35242 transitions. [2020-09-04 14:09:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:09:01,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-09-04 14:09:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:09:01,655 INFO L225 Difference]: With dead ends: 21947 [2020-09-04 14:09:01,655 INFO L226 Difference]: Without dead ends: 15101 [2020-09-04 14:09:01,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:09:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15101 states. [2020-09-04 14:09:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15101 to 12963. [2020-09-04 14:09:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12963 states. [2020-09-04 14:09:02,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12963 states to 12963 states and 21117 transitions. [2020-09-04 14:09:02,164 INFO L78 Accepts]: Start accepts. Automaton has 12963 states and 21117 transitions. Word has length 499 [2020-09-04 14:09:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:09:02,164 INFO L479 AbstractCegarLoop]: Abstraction has 12963 states and 21117 transitions. [2020-09-04 14:09:02,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:09:02,165 INFO L276 IsEmpty]: Start isEmpty. Operand 12963 states and 21117 transitions. [2020-09-04 14:09:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-09-04 14:09:02,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:09:02,180 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, 1, 1, 1] [2020-09-04 14:09:02,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 14:09:02,180 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:09:02,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:09:02,181 INFO L82 PathProgramCache]: Analyzing trace with hash 518385210, now seen corresponding path program 1 times [2020-09-04 14:09:02,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:09:02,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522461523] [2020-09-04 14:09:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:09:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:09:03,847 WARN L193 SmtUtils]: Spent 997.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:09:03,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:09:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:09:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:09:04,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522461523] [2020-09-04 14:09:04,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:09:04,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:09:04,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675920596] [2020-09-04 14:09:04,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:09:04,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:09:04,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:09:04,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:09:04,370 INFO L87 Difference]: Start difference. First operand 12963 states and 21117 transitions. Second operand 4 states. [2020-09-04 14:09:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:09:28,836 INFO L93 Difference]: Finished difference Result 37125 states and 60352 transitions. [2020-09-04 14:09:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:09:28,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-09-04 14:09:28,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:09:28,876 INFO L225 Difference]: With dead ends: 37125 [2020-09-04 14:09:28,876 INFO L226 Difference]: Without dead ends: 25131 [2020-09-04 14:09:28,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:09:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25131 states. [2020-09-04 14:09:29,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25131 to 25080. [2020-09-04 14:09:29,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25080 states. [2020-09-04 14:09:29,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25080 states to 25080 states and 40686 transitions. [2020-09-04 14:09:29,990 INFO L78 Accepts]: Start accepts. Automaton has 25080 states and 40686 transitions. Word has length 499 [2020-09-04 14:09:29,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:09:29,991 INFO L479 AbstractCegarLoop]: Abstraction has 25080 states and 40686 transitions. [2020-09-04 14:09:29,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:09:29,991 INFO L276 IsEmpty]: Start isEmpty. Operand 25080 states and 40686 transitions. [2020-09-04 14:09:30,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-09-04 14:09:30,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:09:30,015 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, 1, 1, 1] [2020-09-04 14:09:30,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 14:09:30,016 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:09:30,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:09:30,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2080091133, now seen corresponding path program 1 times [2020-09-04 14:09:30,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:09:30,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469264264] [2020-09-04 14:09:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:09:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:09:32,280 WARN L193 SmtUtils]: Spent 978.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:09:32,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:09:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:09:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:09:32,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469264264] [2020-09-04 14:09:32,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:09:32,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:09:32,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535612055] [2020-09-04 14:09:32,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:09:32,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:09:32,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:09:32,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:09:32,509 INFO L87 Difference]: Start difference. First operand 25080 states and 40686 transitions. Second operand 5 states. [2020-09-04 14:09:55,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:09:55,342 INFO L93 Difference]: Finished difference Result 57964 states and 94551 transitions. [2020-09-04 14:09:55,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:09:55,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 499 [2020-09-04 14:09:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:09:55,375 INFO L225 Difference]: With dead ends: 57964 [2020-09-04 14:09:55,376 INFO L226 Difference]: Without dead ends: 29594 [2020-09-04 14:09:55,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:09:55,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29594 states. [2020-09-04 14:09:56,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29594 to 29534. [2020-09-04 14:09:56,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29534 states. [2020-09-04 14:09:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29534 states to 29534 states and 48033 transitions. [2020-09-04 14:09:56,396 INFO L78 Accepts]: Start accepts. Automaton has 29534 states and 48033 transitions. Word has length 499 [2020-09-04 14:09:56,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:09:56,396 INFO L479 AbstractCegarLoop]: Abstraction has 29534 states and 48033 transitions. [2020-09-04 14:09:56,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:09:56,397 INFO L276 IsEmpty]: Start isEmpty. Operand 29534 states and 48033 transitions. [2020-09-04 14:09:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-09-04 14:09:56,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:09:56,423 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, 1, 1, 1, 1, 1] [2020-09-04 14:09:56,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 14:09:56,423 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:09:56,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:09:56,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1245686880, now seen corresponding path program 1 times [2020-09-04 14:09:56,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:09:56,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476778975] [2020-09-04 14:09:56,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:09:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:09:57,911 WARN L193 SmtUtils]: Spent 992.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:09:57,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:09:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:09:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:09:58,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476778975] [2020-09-04 14:09:58,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:09:58,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:09:58,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035910208] [2020-09-04 14:09:58,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:09:58,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:09:58,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:09:58,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:09:58,592 INFO L87 Difference]: Start difference. First operand 29534 states and 48033 transitions. Second operand 4 states. [2020-09-04 14:10:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:10:24,988 INFO L93 Difference]: Finished difference Result 86594 states and 140872 transitions. [2020-09-04 14:10:24,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:10:24,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-09-04 14:10:24,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:10:25,049 INFO L225 Difference]: With dead ends: 86594 [2020-09-04 14:10:25,049 INFO L226 Difference]: Without dead ends: 58080 [2020-09-04 14:10:25,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:10:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58080 states. [2020-09-04 14:10:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58080 to 58039. [2020-09-04 14:10:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58039 states. [2020-09-04 14:10:29,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58039 states to 58039 states and 94066 transitions. [2020-09-04 14:10:29,133 INFO L78 Accepts]: Start accepts. Automaton has 58039 states and 94066 transitions. Word has length 501 [2020-09-04 14:10:29,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:10:29,134 INFO L479 AbstractCegarLoop]: Abstraction has 58039 states and 94066 transitions. [2020-09-04 14:10:29,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:10:29,134 INFO L276 IsEmpty]: Start isEmpty. Operand 58039 states and 94066 transitions. [2020-09-04 14:10:29,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-09-04 14:10:29,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:10:29,190 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, 1, 1, 1, 1, 1] [2020-09-04 14:10:29,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 14:10:29,190 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:10:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:10:29,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1992437422, now seen corresponding path program 1 times [2020-09-04 14:10:29,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:10:29,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390005354] [2020-09-04 14:10:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:10:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:10:30,673 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:10:30,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:10:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:10:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:10:30,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390005354] [2020-09-04 14:10:30,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:10:30,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:10:30,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017468576] [2020-09-04 14:10:30,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:10:30,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:10:30,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:10:30,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:10:30,862 INFO L87 Difference]: Start difference. First operand 58039 states and 94066 transitions. Second operand 4 states. [2020-09-04 14:10:50,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:10:50,799 INFO L93 Difference]: Finished difference Result 107199 states and 172119 transitions. [2020-09-04 14:10:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:10:50,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-09-04 14:10:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:10:50,896 INFO L225 Difference]: With dead ends: 107199 [2020-09-04 14:10:50,896 INFO L226 Difference]: Without dead ends: 76137 [2020-09-04 14:10:50,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:10:50,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76137 states. [2020-09-04 14:10:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76137 to 69303. [2020-09-04 14:10:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69303 states. [2020-09-04 14:10:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69303 states to 69303 states and 112546 transitions. [2020-09-04 14:10:53,925 INFO L78 Accepts]: Start accepts. Automaton has 69303 states and 112546 transitions. Word has length 501 [2020-09-04 14:10:53,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:10:53,925 INFO L479 AbstractCegarLoop]: Abstraction has 69303 states and 112546 transitions. [2020-09-04 14:10:53,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:10:53,925 INFO L276 IsEmpty]: Start isEmpty. Operand 69303 states and 112546 transitions. [2020-09-04 14:10:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-09-04 14:10:53,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:10:53,987 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, 1, 1, 1, 1, 1, 1] [2020-09-04 14:10:53,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 14:10:53,987 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:10:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:10:53,988 INFO L82 PathProgramCache]: Analyzing trace with hash -429274846, now seen corresponding path program 1 times [2020-09-04 14:10:53,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:10:53,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835848064] [2020-09-04 14:10:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:10:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:10:55,622 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:10:55,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:10:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:10:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:10:55,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835848064] [2020-09-04 14:10:55,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:10:55,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:10:55,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879602474] [2020-09-04 14:10:55,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 14:10:55,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:10:55,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 14:10:55,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:10:55,880 INFO L87 Difference]: Start difference. First operand 69303 states and 112546 transitions. Second operand 6 states. [2020-09-04 14:10:57,059 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:11:14,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:11:14,472 INFO L93 Difference]: Finished difference Result 114173 states and 183662 transitions. [2020-09-04 14:11:14,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 14:11:14,473 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 502 [2020-09-04 14:11:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:11:14,593 INFO L225 Difference]: With dead ends: 114173 [2020-09-04 14:11:14,593 INFO L226 Difference]: Without dead ends: 69303 [2020-09-04 14:11:14,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-04 14:11:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69303 states. [2020-09-04 14:11:20,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69303 to 69303. [2020-09-04 14:11:20,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69303 states. [2020-09-04 14:11:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69303 states to 69303 states and 111930 transitions. [2020-09-04 14:11:20,458 INFO L78 Accepts]: Start accepts. Automaton has 69303 states and 111930 transitions. Word has length 502 [2020-09-04 14:11:20,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:11:20,459 INFO L479 AbstractCegarLoop]: Abstraction has 69303 states and 111930 transitions. [2020-09-04 14:11:20,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 14:11:20,459 INFO L276 IsEmpty]: Start isEmpty. Operand 69303 states and 111930 transitions. [2020-09-04 14:11:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-09-04 14:11:20,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:11:20,505 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, 1, 1, 1, 1, 1, 1] [2020-09-04 14:11:20,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 14:11:20,506 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:11:20,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:11:20,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1111657017, now seen corresponding path program 1 times [2020-09-04 14:11:20,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:11:20,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541933479] [2020-09-04 14:11:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:11:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:11:23,191 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:11:23,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:11:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:11:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:11:23,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541933479] [2020-09-04 14:11:23,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:11:23,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:11:23,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378909370] [2020-09-04 14:11:23,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:11:23,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:11:23,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:11:23,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:11:23,477 INFO L87 Difference]: Start difference. First operand 69303 states and 111930 transitions. Second operand 5 states. [2020-09-04 14:11:51,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:11:51,043 INFO L93 Difference]: Finished difference Result 202624 states and 327343 transitions. [2020-09-04 14:11:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:11:51,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 502 [2020-09-04 14:11:51,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:11:53,193 INFO L225 Difference]: With dead ends: 202624 [2020-09-04 14:11:53,193 INFO L226 Difference]: Without dead ends: 134757 [2020-09-04 14:11:53,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:11:53,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134757 states. [2020-09-04 14:11:59,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134757 to 134709. [2020-09-04 14:11:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134709 states. [2020-09-04 14:11:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134709 states to 134709 states and 216940 transitions. [2020-09-04 14:11:59,784 INFO L78 Accepts]: Start accepts. Automaton has 134709 states and 216940 transitions. Word has length 502 [2020-09-04 14:11:59,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:11:59,784 INFO L479 AbstractCegarLoop]: Abstraction has 134709 states and 216940 transitions. [2020-09-04 14:11:59,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:11:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 134709 states and 216940 transitions. [2020-09-04 14:11:59,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-09-04 14:11:59,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:11:59,875 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:11:59,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 14:11:59,875 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:11:59,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:11:59,876 INFO L82 PathProgramCache]: Analyzing trace with hash -158101499, now seen corresponding path program 1 times [2020-09-04 14:11:59,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:11:59,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403106705] [2020-09-04 14:11:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:12:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:12:01,416 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:12:01,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:12:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:12:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:12:03,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403106705] [2020-09-04 14:12:03,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:12:03,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:12:03,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730519249] [2020-09-04 14:12:03,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:12:03,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:12:03,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:12:03,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:12:03,726 INFO L87 Difference]: Start difference. First operand 134709 states and 216940 transitions. Second operand 4 states. [2020-09-04 14:12:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:12:42,888 INFO L93 Difference]: Finished difference Result 395061 states and 635305 transitions. [2020-09-04 14:12:42,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:12:42,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 503 [2020-09-04 14:12:42,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:12:43,231 INFO L225 Difference]: With dead ends: 395061 [2020-09-04 14:12:43,231 INFO L226 Difference]: Without dead ends: 265031 [2020-09-04 14:12:43,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:12:43,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265031 states. [2020-09-04 14:13:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265031 to 264992. [2020-09-04 14:13:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264992 states. [2020-09-04 14:13:04,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264992 states to 264992 states and 425068 transitions. [2020-09-04 14:13:04,039 INFO L78 Accepts]: Start accepts. Automaton has 264992 states and 425068 transitions. Word has length 503 [2020-09-04 14:13:04,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:13:04,040 INFO L479 AbstractCegarLoop]: Abstraction has 264992 states and 425068 transitions. [2020-09-04 14:13:04,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:13:04,040 INFO L276 IsEmpty]: Start isEmpty. Operand 264992 states and 425068 transitions. [2020-09-04 14:13:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-09-04 14:13:04,205 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:13:04,206 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:13:04,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 14:13:04,206 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:13:04,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:13:04,207 INFO L82 PathProgramCache]: Analyzing trace with hash -898375032, now seen corresponding path program 1 times [2020-09-04 14:13:04,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:13:04,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727812155] [2020-09-04 14:13:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:13:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:13:05,975 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:13:05,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:13:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:13:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:13:06,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727812155] [2020-09-04 14:13:06,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:13:06,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:13:06,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874737200] [2020-09-04 14:13:06,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:13:06,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:13:06,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:13:06,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:13:06,149 INFO L87 Difference]: Start difference. First operand 264992 states and 425068 transitions. Second operand 5 states. [2020-09-04 14:13:51,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:13:51,007 INFO L93 Difference]: Finished difference Result 622857 states and 1002450 transitions. [2020-09-04 14:13:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:13:51,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 503 [2020-09-04 14:13:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:13:51,421 INFO L225 Difference]: With dead ends: 622857 [2020-09-04 14:13:51,421 INFO L226 Difference]: Without dead ends: 314311 [2020-09-04 14:13:52,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:13:52,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314311 states. [2020-09-04 14:14:16,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314311 to 314187. [2020-09-04 14:14:16,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314187 states. [2020-09-04 14:14:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314187 states to 314187 states and 504351 transitions. [2020-09-04 14:14:16,809 INFO L78 Accepts]: Start accepts. Automaton has 314187 states and 504351 transitions. Word has length 503 [2020-09-04 14:14:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:14:16,809 INFO L479 AbstractCegarLoop]: Abstraction has 314187 states and 504351 transitions. [2020-09-04 14:14:16,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:14:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 314187 states and 504351 transitions. [2020-09-04 14:14:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-09-04 14:14:21,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:14:21,678 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:14:21,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 14:14:21,678 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:14:21,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:14:21,679 INFO L82 PathProgramCache]: Analyzing trace with hash -568171736, now seen corresponding path program 1 times [2020-09-04 14:14:21,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:14:21,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327472264] [2020-09-04 14:14:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:14:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:14:23,174 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:14:23,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:14:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:14:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:14:23,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327472264] [2020-09-04 14:14:23,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:14:23,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:14:23,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268056041] [2020-09-04 14:14:23,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:14:23,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:14:23,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:14:23,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:14:23,429 INFO L87 Difference]: Start difference. First operand 314187 states and 504351 transitions. Second operand 4 states. [2020-09-04 14:15:31,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:15:31,648 INFO L93 Difference]: Finished difference Result 911624 states and 1460026 transitions. [2020-09-04 14:15:31,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:15:31,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2020-09-04 14:15:31,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:15:32,649 INFO L225 Difference]: With dead ends: 911624 [2020-09-04 14:15:32,650 INFO L226 Difference]: Without dead ends: 612786 [2020-09-04 14:15:32,857 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 [2020-09-04 14:15:33,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612786 states. [2020-09-04 14:16:14,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612786 to 612738. [2020-09-04 14:16:14,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612738 states. [2020-09-04 14:16:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612738 states to 612738 states and 978553 transitions. [2020-09-04 14:16:15,483 INFO L78 Accepts]: Start accepts. Automaton has 612738 states and 978553 transitions. Word has length 504 [2020-09-04 14:16:15,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:16:15,483 INFO L479 AbstractCegarLoop]: Abstraction has 612738 states and 978553 transitions. [2020-09-04 14:16:15,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:16:15,483 INFO L276 IsEmpty]: Start isEmpty. Operand 612738 states and 978553 transitions. [2020-09-04 14:16:24,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-09-04 14:16:24,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:16:24,305 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:16:24,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 14:16:24,306 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:16:24,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:16:24,307 INFO L82 PathProgramCache]: Analyzing trace with hash -2047146202, now seen corresponding path program 1 times [2020-09-04 14:16:24,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:16:24,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758361010] [2020-09-04 14:16:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:16:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:16:25,758 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 400 [2020-09-04 14:16:25,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:16:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:16:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:16:26,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758361010] [2020-09-04 14:16:26,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:16:26,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:16:26,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987435287] [2020-09-04 14:16:26,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:16:26,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:16:26,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:16:26,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:16:26,021 INFO L87 Difference]: Start difference. First operand 612738 states and 978553 transitions. Second operand 4 states.