/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 04:49:59,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:49:59,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:49:59,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:49:59,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:49:59,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:49:59,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:49:59,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:49:59,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:49:59,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:49:59,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:49:59,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:49:59,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:49:59,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:49:59,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:49:59,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:49:59,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:49:59,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:49:59,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:49:59,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:49:59,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:49:59,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:49:59,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:49:59,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:49:59,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 04:49:59,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 04:49:59,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 04:49:59,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 04:49:59,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 04:49:59,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 04:49:59,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 04:49:59,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 04:49:59,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 04:49:59,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 04:49:59,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 04:49:59,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 04:49:59,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 04:49:59,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 04:49:59,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:49:59,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:49:59,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:49:59,615 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 [2020-08-22 04:49:59,638 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:49:59,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:49:59,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:49:59,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:49:59,639 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:49:59,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:49:59,640 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:49:59,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:49:59,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:49:59,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:49:59,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:49:59,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:49:59,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:49:59,642 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:49:59,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:49:59,642 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:49:59,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:49:59,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:49:59,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:49:59,643 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:49:59,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:49:59,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:49:59,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:49:59,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:49:59,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:49:59,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:49:59,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:49:59,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:49:59,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:49:59,646 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-08-22 04:49:59,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:49:59,951 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:49:59,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:49:59,958 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:49:59,958 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:49:59,959 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 04:50:00,017 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c5378319/0590434f16864b77b02755a5bdc4a2bb/FLAGa4c66c048 [2020-08-22 04:50:00,628 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:50:00,628 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 04:50:00,656 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c5378319/0590434f16864b77b02755a5bdc4a2bb/FLAGa4c66c048 [2020-08-22 04:50:00,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c5378319/0590434f16864b77b02755a5bdc4a2bb [2020-08-22 04:50:00,864 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:50:00,866 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:50:00,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:50:00,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:50:00,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:50:00,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:50:00" (1/1) ... [2020-08-22 04:50:00,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@368a0f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:50:00, skipping insertion in model container [2020-08-22 04:50:00,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:50:00" (1/1) ... [2020-08-22 04:50:00,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:50:01,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:50:02,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:50:02,074 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:50:02,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:50:02,607 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:50:02,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:50:02 WrapperNode [2020-08-22 04:50:02,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:50:02,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:50:02,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:50:02,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:50:02,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:50:02" (1/1) ... [2020-08-22 04:50:02,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:50:02" (1/1) ... [2020-08-22 04:50:02,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:50:02" (1/1) ... [2020-08-22 04:50:02,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:50:02" (1/1) ... [2020-08-22 04:50:02,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:50:02" (1/1) ... [2020-08-22 04:50:02,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:50:02" (1/1) ... [2020-08-22 04:50:02,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:50:02" (1/1) ... [2020-08-22 04:50:02,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:50:02,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:50:02,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:50:02,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:50:02,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:50:02" (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 [2020-08-22 04:50:02,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:50:02,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:50:02,950 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 04:50:02,950 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:50:02,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:50:02,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 04:50:02,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 04:50:02,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 04:50:02,951 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 04:50:02,952 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 04:50:02,952 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 04:50:02,952 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 04:50:02,952 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 04:50:02,953 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 04:50:02,953 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 04:50:02,953 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 04:50:02,953 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 04:50:02,954 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 04:50:02,954 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 04:50:02,954 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:50:02,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:50:02,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:50:05,600 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:50:05,601 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 04:50:05,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:50:05 BoogieIcfgContainer [2020-08-22 04:50:05,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:50:05,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:50:05,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:50:05,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:50:05,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:50:00" (1/3) ... [2020-08-22 04:50:05,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a39a754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:50:05, skipping insertion in model container [2020-08-22 04:50:05,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:50:02" (2/3) ... [2020-08-22 04:50:05,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a39a754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:50:05, skipping insertion in model container [2020-08-22 04:50:05,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:50:05" (3/3) ... [2020-08-22 04:50:05,632 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 04:50:05,647 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:50:05,666 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:50:05,681 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:50:05,718 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:50:05,719 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:50:05,719 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:50:05,719 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:50:05,719 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:50:05,719 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:50:05,719 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:50:05,719 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:50:05,760 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-08-22 04:50:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-22 04:50:05,801 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:05,803 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] [2020-08-22 04:50:05,803 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:05,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:05,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-08-22 04:50:05,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:05,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179901552] [2020-08-22 04:50:05,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:07,558 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 04:50:07,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:07,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179901552] [2020-08-22 04:50:07,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:07,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:50:07,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045732574] [2020-08-22 04:50:07,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:50:07,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:07,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:50:07,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:50:07,799 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 4 states. [2020-08-22 04:50:08,279 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 04:50:13,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:13,040 INFO L93 Difference]: Finished difference Result 1527 states and 2683 transitions. [2020-08-22 04:50:13,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:50:13,043 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-22 04:50:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:13,070 INFO L225 Difference]: With dead ends: 1527 [2020-08-22 04:50:13,070 INFO L226 Difference]: Without dead ends: 1311 [2020-08-22 04:50:13,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:50:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-08-22 04:50:13,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309. [2020-08-22 04:50:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2020-08-22 04:50:13,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions. [2020-08-22 04:50:13,234 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330 [2020-08-22 04:50:13,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:13,235 INFO L479 AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions. [2020-08-22 04:50:13,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:50:13,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions. [2020-08-22 04:50:13,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-22 04:50:13,243 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:13,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:50:13,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:50:13,244 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:13,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:13,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times [2020-08-22 04:50:13,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:13,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42900412] [2020-08-22 04:50:13,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:14,207 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 04:50:14,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:14,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42900412] [2020-08-22 04:50:14,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:14,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:50:14,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39377541] [2020-08-22 04:50:14,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:50:14,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:14,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:50:14,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:50:14,490 INFO L87 Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states. [2020-08-22 04:50:15,121 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 04:50:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:19,229 INFO L93 Difference]: Finished difference Result 2683 states and 4213 transitions. [2020-08-22 04:50:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:50:19,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-22 04:50:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:19,245 INFO L225 Difference]: With dead ends: 2683 [2020-08-22 04:50:19,246 INFO L226 Difference]: Without dead ends: 2301 [2020-08-22 04:50:19,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:50:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2020-08-22 04:50:19,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299. [2020-08-22 04:50:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-08-22 04:50:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions. [2020-08-22 04:50:19,343 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330 [2020-08-22 04:50:19,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:19,345 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions. [2020-08-22 04:50:19,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:50:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions. [2020-08-22 04:50:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-22 04:50:19,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:19,357 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] [2020-08-22 04:50:19,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:50:19,358 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:19,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times [2020-08-22 04:50:19,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:19,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458557595] [2020-08-22 04:50:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:20,272 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 04:50:20,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:20,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458557595] [2020-08-22 04:50:20,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:20,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:50:20,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605125103] [2020-08-22 04:50:20,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:50:20,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:20,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:50:20,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:50:20,447 INFO L87 Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states. [2020-08-22 04:50:20,850 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 04:50:25,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:25,136 INFO L93 Difference]: Finished difference Result 4867 states and 7634 transitions. [2020-08-22 04:50:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:50:25,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-22 04:50:25,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:25,156 INFO L225 Difference]: With dead ends: 4867 [2020-08-22 04:50:25,156 INFO L226 Difference]: Without dead ends: 4201 [2020-08-22 04:50:25,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:50:25,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2020-08-22 04:50:25,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199. [2020-08-22 04:50:25,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2020-08-22 04:50:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions. [2020-08-22 04:50:25,284 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330 [2020-08-22 04:50:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:25,285 INFO L479 AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions. [2020-08-22 04:50:25,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:50:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions. [2020-08-22 04:50:25,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-22 04:50:25,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:25,296 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] [2020-08-22 04:50:25,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:50:25,297 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times [2020-08-22 04:50:25,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:25,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379084947] [2020-08-22 04:50:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:26,261 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 04:50:26,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:26,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379084947] [2020-08-22 04:50:26,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:26,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:50:26,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840648040] [2020-08-22 04:50:26,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:50:26,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:26,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:50:26,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:50:26,507 INFO L87 Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states. [2020-08-22 04:50:33,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:33,380 INFO L93 Difference]: Finished difference Result 12414 states and 19245 transitions. [2020-08-22 04:50:33,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:50:33,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-08-22 04:50:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:33,414 INFO L225 Difference]: With dead ends: 12414 [2020-08-22 04:50:33,414 INFO L226 Difference]: Without dead ends: 8230 [2020-08-22 04:50:33,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:50:33,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2020-08-22 04:50:33,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228. [2020-08-22 04:50:33,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8228 states. [2020-08-22 04:50:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions. [2020-08-22 04:50:33,746 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330 [2020-08-22 04:50:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:33,746 INFO L479 AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions. [2020-08-22 04:50:33,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:50:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions. [2020-08-22 04:50:33,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-22 04:50:33,776 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:33,777 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] [2020-08-22 04:50:33,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:50:33,778 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:33,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:33,779 INFO L82 PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times [2020-08-22 04:50:33,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:33,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183695646] [2020-08-22 04:50:33,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:34,543 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 04:50:34,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:34,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183695646] [2020-08-22 04:50:34,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:34,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:50:34,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416486793] [2020-08-22 04:50:34,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:50:34,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:34,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:50:34,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:50:34,720 INFO L87 Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states. [2020-08-22 04:50:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:42,248 INFO L93 Difference]: Finished difference Result 24233 states and 37318 transitions. [2020-08-22 04:50:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 04:50:42,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-08-22 04:50:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:42,303 INFO L225 Difference]: With dead ends: 24233 [2020-08-22 04:50:42,303 INFO L226 Difference]: Without dead ends: 16134 [2020-08-22 04:50:42,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:50:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16134 states. [2020-08-22 04:50:42,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132. [2020-08-22 04:50:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16132 states. [2020-08-22 04:50:42,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions. [2020-08-22 04:50:42,771 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332 [2020-08-22 04:50:42,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:42,771 INFO L479 AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions. [2020-08-22 04:50:42,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:50:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions. [2020-08-22 04:50:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-22 04:50:42,806 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:42,807 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] [2020-08-22 04:50:42,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:50:42,811 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:42,811 INFO L82 PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times [2020-08-22 04:50:42,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:42,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628108350] [2020-08-22 04:50:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:43,286 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 04:50:43,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:43,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628108350] [2020-08-22 04:50:43,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:43,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:50:43,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802033998] [2020-08-22 04:50:43,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:50:43,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:43,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:50:43,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:50:43,388 INFO L87 Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states. [2020-08-22 04:50:51,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:50:51,520 INFO L93 Difference]: Finished difference Result 48321 states and 74099 transitions. [2020-08-22 04:50:51,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 04:50:51,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-08-22 04:50:51,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:50:51,583 INFO L225 Difference]: With dead ends: 48321 [2020-08-22 04:50:51,584 INFO L226 Difference]: Without dead ends: 32231 [2020-08-22 04:50:51,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:50:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32231 states. [2020-08-22 04:50:52,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32231 to 16151. [2020-08-22 04:50:52,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16151 states. [2020-08-22 04:50:52,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 24769 transitions. [2020-08-22 04:50:52,304 INFO L78 Accepts]: Start accepts. Automaton has 16151 states and 24769 transitions. Word has length 332 [2020-08-22 04:50:52,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:50:52,304 INFO L479 AbstractCegarLoop]: Abstraction has 16151 states and 24769 transitions. [2020-08-22 04:50:52,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:50:52,305 INFO L276 IsEmpty]: Start isEmpty. Operand 16151 states and 24769 transitions. [2020-08-22 04:50:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-08-22 04:50:52,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:50:52,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:50:52,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:50:52,333 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:50:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:50:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1868318850, now seen corresponding path program 1 times [2020-08-22 04:50:52,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:50:52,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730117407] [2020-08-22 04:50:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:50:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:52,903 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 04:50:52,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:50:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:50:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:50:53,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730117407] [2020-08-22 04:50:53,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:50:53,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:50:53,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698529716] [2020-08-22 04:50:53,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:50:53,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:50:53,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:50:53,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:50:53,006 INFO L87 Difference]: Start difference. First operand 16151 states and 24769 transitions. Second operand 4 states.