/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:08:11,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:08:11,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:08:11,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:08:11,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:08:11,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:08:11,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:08:11,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:08:11,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:08:11,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:08:11,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:08:11,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:08:11,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:08:11,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:08:11,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:08:11,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:08:11,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:08:11,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:08:11,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:08:11,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:08:11,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:08:11,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:08:11,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:08:11,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:08:11,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 02:08:11,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 02:08:11,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 02:08:11,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 02:08:11,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 02:08:11,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 02:08:12,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:08:12,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:08:12,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:08:12,005 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 [2020-08-19 02:08:12,026 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:08:12,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:08:12,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:08:12,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:08:12,028 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:08:12,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:08:12,028 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:08:12,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:08:12,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:08:12,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:08:12,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:08:12,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:08:12,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:08:12,029 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:08:12,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:08:12,030 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:08:12,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:08:12,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:08:12,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:08:12,031 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:08:12,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:08:12,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:08:12,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:08:12,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:08:12,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:08:12,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:08:12,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:08:12,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:08:12,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:08:12,033 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=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; [2020-08-19 02:08:12,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:08:12,342 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:08:12,347 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:08:12,350 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:08:12,351 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:08:12,352 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-19 02:08:12,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71620e23e/cd86c1ff00f14787ae79d545bbfae8e2/FLAG381606abf [2020-08-19 02:08:13,064 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:08:13,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-19 02:08:13,084 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71620e23e/cd86c1ff00f14787ae79d545bbfae8e2/FLAG381606abf [2020-08-19 02:08:13,242 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71620e23e/cd86c1ff00f14787ae79d545bbfae8e2 [2020-08-19 02:08:13,254 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:08:13,257 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:08:13,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:08:13,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:08:13,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:08:13,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:08:13" (1/1) ... [2020-08-19 02:08:13,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c752f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:08:13, skipping insertion in model container [2020-08-19 02:08:13,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:08:13" (1/1) ... [2020-08-19 02:08:13,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:08:13,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:08:14,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:08:14,485 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:08:14,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:08:15,023 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:08:15,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:08:15 WrapperNode [2020-08-19 02:08:15,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:08:15,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:08:15,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:08:15,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:08:15,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:08:15" (1/1) ... [2020-08-19 02:08:15,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:08:15" (1/1) ... [2020-08-19 02:08:15,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:08:15" (1/1) ... [2020-08-19 02:08:15,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:08:15" (1/1) ... [2020-08-19 02:08:15,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:08:15" (1/1) ... [2020-08-19 02:08:15,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:08:15" (1/1) ... [2020-08-19 02:08:15,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:08:15" (1/1) ... [2020-08-19 02:08:15,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:08:15,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:08:15,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:08:15,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:08:15,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:08:15" (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 [2020-08-19 02:08:15,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:08:15,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:08:15,272 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 02:08:15,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:08:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:08:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 02:08:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-19 02:08:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-19 02:08:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-19 02:08:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 02:08:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 02:08:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-19 02:08:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-19 02:08:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-19 02:08:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-19 02:08:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-19 02:08:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-19 02:08:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-19 02:08:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-19 02:08:15,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:08:15,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:08:15,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:08:17,957 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:08:17,958 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 02:08:17,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:08:17 BoogieIcfgContainer [2020-08-19 02:08:17,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:08:17,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:08:17,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:08:17,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:08:17,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:08:13" (1/3) ... [2020-08-19 02:08:17,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdc636c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:08:17, skipping insertion in model container [2020-08-19 02:08:17,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:08:15" (2/3) ... [2020-08-19 02:08:17,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdc636c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:08:17, skipping insertion in model container [2020-08-19 02:08:17,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:08:17" (3/3) ... [2020-08-19 02:08:17,977 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-19 02:08:17,990 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:08:18,007 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:08:18,024 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:08:18,049 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:08:18,049 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:08:18,049 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:08:18,049 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:08:18,049 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:08:18,049 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:08:18,049 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:08:18,050 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:08:18,083 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-08-19 02:08:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-19 02:08:18,109 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:08:18,110 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] [2020-08-19 02:08:18,111 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:08:18,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:08:18,117 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-08-19 02:08:18,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:08:18,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766568690] [2020-08-19 02:08:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:08:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:08:20,118 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 02:08:20,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:08:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:08:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:08:20,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766568690] [2020-08-19 02:08:20,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:08:20,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:08:20,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989249240] [2020-08-19 02:08:20,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:08:20,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:08:20,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:08:20,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:08:20,490 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-08-19 02:08:21,054 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-19 02:08:26,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:08:26,224 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-08-19 02:08:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:08:26,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-19 02:08:26,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:08:26,256 INFO L225 Difference]: With dead ends: 1489 [2020-08-19 02:08:26,257 INFO L226 Difference]: Without dead ends: 1273 [2020-08-19 02:08:26,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:08:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-08-19 02:08:26,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-08-19 02:08:26,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-08-19 02:08:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-08-19 02:08:26,415 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-08-19 02:08:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:08:26,419 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-08-19 02:08:26,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:08:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-08-19 02:08:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-19 02:08:26,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:08:26,427 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] [2020-08-19 02:08:26,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:08:26,428 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:08:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:08:26,429 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-08-19 02:08:26,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:08:26,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182123405] [2020-08-19 02:08:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:08:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:08:27,470 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 02:08:27,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:08:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:08:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:08:27,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182123405] [2020-08-19 02:08:27,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:08:27,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:08:27,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420049762] [2020-08-19 02:08:27,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:08:27,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:08:27,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:08:27,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:08:27,743 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 4 states. [2020-08-19 02:08:28,481 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-19 02:08:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:08:32,911 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-08-19 02:08:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:08:32,912 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-19 02:08:32,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:08:32,926 INFO L225 Difference]: With dead ends: 2607 [2020-08-19 02:08:32,926 INFO L226 Difference]: Without dead ends: 2225 [2020-08-19 02:08:32,930 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 [2020-08-19 02:08:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-08-19 02:08:33,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-08-19 02:08:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-08-19 02:08:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-08-19 02:08:33,012 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-08-19 02:08:33,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:08:33,013 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-08-19 02:08:33,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:08:33,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-08-19 02:08:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-19 02:08:33,021 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:08:33,021 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] [2020-08-19 02:08:33,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:08:33,022 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:08:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:08:33,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-08-19 02:08:33,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:08:33,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635644101] [2020-08-19 02:08:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:08:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:08:33,901 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 02:08:33,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:08:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:08:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:08:34,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635644101] [2020-08-19 02:08:34,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:08:34,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:08:34,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512423331] [2020-08-19 02:08:34,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:08:34,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:08:34,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:08:34,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:08:34,110 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 4 states. [2020-08-19 02:08:34,532 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-19 02:08:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:08:39,346 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-08-19 02:08:39,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:08:39,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-19 02:08:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:08:39,378 INFO L225 Difference]: With dead ends: 4715 [2020-08-19 02:08:39,379 INFO L226 Difference]: Without dead ends: 4049 [2020-08-19 02:08:39,382 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 [2020-08-19 02:08:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-08-19 02:08:39,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-08-19 02:08:39,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-08-19 02:08:39,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-08-19 02:08:39,527 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-08-19 02:08:39,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:08:39,528 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-08-19 02:08:39,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:08:39,528 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-08-19 02:08:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-19 02:08:39,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:08:39,539 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] [2020-08-19 02:08:39,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:08:39,539 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:08:39,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:08:39,540 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-08-19 02:08:39,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:08:39,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621457545] [2020-08-19 02:08:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:08:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:08:40,476 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 02:08:40,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:08:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:08:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:08:40,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621457545] [2020-08-19 02:08:40,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:08:40,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:08:40,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404880377] [2020-08-19 02:08:40,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:08:40,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:08:40,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:08:40,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:08:40,647 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 5 states. [2020-08-19 02:08:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:08:47,970 INFO L93 Difference]: Finished difference Result 11998 states and 18565 transitions. [2020-08-19 02:08:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:08:47,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2020-08-19 02:08:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:08:48,011 INFO L225 Difference]: With dead ends: 11998 [2020-08-19 02:08:48,011 INFO L226 Difference]: Without dead ends: 7966 [2020-08-19 02:08:48,020 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 [2020-08-19 02:08:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2020-08-19 02:08:48,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 7964. [2020-08-19 02:08:48,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7964 states. [2020-08-19 02:08:48,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 12270 transitions. [2020-08-19 02:08:48,336 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 12270 transitions. Word has length 326 [2020-08-19 02:08:48,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:08:48,337 INFO L479 AbstractCegarLoop]: Abstraction has 7964 states and 12270 transitions. [2020-08-19 02:08:48,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:08:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 12270 transitions. [2020-08-19 02:08:48,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-19 02:08:48,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:08:48,357 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] [2020-08-19 02:08:48,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:08:48,357 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:08:48,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:08:48,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1396966584, now seen corresponding path program 1 times [2020-08-19 02:08:48,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:08:48,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826520939] [2020-08-19 02:08:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:08:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:08:49,086 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 02:08:49,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:08:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:08:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:08:49,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826520939] [2020-08-19 02:08:49,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:08:49,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:08:49,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134973996] [2020-08-19 02:08:49,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:08:49,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:08:49,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:08:49,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:08:49,250 INFO L87 Difference]: Start difference. First operand 7964 states and 12270 transitions. Second operand 4 states. [2020-08-19 02:08:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:08:56,884 INFO L93 Difference]: Finished difference Result 23441 states and 36046 transitions. [2020-08-19 02:08:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:08:56,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-19 02:08:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:08:56,947 INFO L225 Difference]: With dead ends: 23441 [2020-08-19 02:08:56,948 INFO L226 Difference]: Without dead ends: 15606 [2020-08-19 02:08:56,966 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 [2020-08-19 02:08:56,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2020-08-19 02:08:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 15604. [2020-08-19 02:08:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15604 states. [2020-08-19 02:08:57,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15604 states to 15604 states and 23893 transitions. [2020-08-19 02:08:57,554 INFO L78 Accepts]: Start accepts. Automaton has 15604 states and 23893 transitions. Word has length 328 [2020-08-19 02:08:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:08:57,555 INFO L479 AbstractCegarLoop]: Abstraction has 15604 states and 23893 transitions. [2020-08-19 02:08:57,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:08:57,555 INFO L276 IsEmpty]: Start isEmpty. Operand 15604 states and 23893 transitions. [2020-08-19 02:08:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-19 02:08:57,587 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:08:57,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:08:57,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:08:57,588 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:08:57,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:08:57,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1164802445, now seen corresponding path program 1 times [2020-08-19 02:08:57,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:08:57,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291458673] [2020-08-19 02:08:57,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:08:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:08:58,283 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 02:08:58,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:08:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:08:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:08:58,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291458673] [2020-08-19 02:08:58,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:08:58,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:08:58,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960364458] [2020-08-19 02:08:58,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:08:58,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:08:58,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:08:58,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:08:58,543 INFO L87 Difference]: Start difference. First operand 15604 states and 23893 transitions. Second operand 4 states. [2020-08-19 02:09:06,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:09:06,527 INFO L93 Difference]: Finished difference Result 46737 states and 71555 transitions. [2020-08-19 02:09:06,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:09:06,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-19 02:09:06,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:09:06,587 INFO L225 Difference]: With dead ends: 46737 [2020-08-19 02:09:06,587 INFO L226 Difference]: Without dead ends: 31175 [2020-08-19 02:09:06,618 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 [2020-08-19 02:09:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31175 states. [2020-08-19 02:09:07,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31175 to 15623. [2020-08-19 02:09:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15623 states. [2020-08-19 02:09:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15623 states to 15623 states and 23921 transitions. [2020-08-19 02:09:07,369 INFO L78 Accepts]: Start accepts. Automaton has 15623 states and 23921 transitions. Word has length 328 [2020-08-19 02:09:07,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:09:07,370 INFO L479 AbstractCegarLoop]: Abstraction has 15623 states and 23921 transitions. [2020-08-19 02:09:07,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:09:07,370 INFO L276 IsEmpty]: Start isEmpty. Operand 15623 states and 23921 transitions. [2020-08-19 02:09:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-08-19 02:09:07,398 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:09:07,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:09:07,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:09:07,400 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:09:07,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:09:07,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1133119755, now seen corresponding path program 1 times [2020-08-19 02:09:07,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:09:07,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655515413] [2020-08-19 02:09:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:09:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:09:07,863 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 02:09:07,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:09:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat