/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=SMALLEST --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.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:54:30,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:54:30,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:54:31,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:54:31,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:54:31,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:54:31,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:54:31,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:54:31,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:54:31,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:54:31,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:54:31,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:54:31,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:54:31,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:54:31,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:54:31,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:54:31,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:54:31,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:54:31,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:54:31,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:54:31,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:54:31,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:54:31,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:54:31,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:54:31,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 15:54:31,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 15:54:31,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 15:54:31,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 15:54:31,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 15:54:31,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 15:54:31,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 15:54:31,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 15:54:31,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 15:54:31,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 15:54:31,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 15:54:31,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 15:54:31,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 15:54:31,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 15:54:31,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:54:31,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:54:31,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:54:31,071 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 [2020-08-21 15:54:31,110 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:54:31,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:54:31,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:54:31,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:54:31,112 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:54:31,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:54:31,112 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:54:31,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:54:31,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:54:31,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:54:31,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:54:31,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:54:31,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:54:31,114 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:54:31,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:54:31,114 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:54:31,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:54:31,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:54:31,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:54:31,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:54:31,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:54:31,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:54:31,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:54:31,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:54:31,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:54:31,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:54:31,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:54:31,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:54:31,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:54:31,117 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=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:54:31,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:54:31,439 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:54:31,443 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:54:31,444 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:54:31,445 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:54:31,445 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-21 15:54:31,519 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/462747557/488cb9a66c574b3493dac500e63569d6/FLAGb8b9867f4 [2020-08-21 15:54:32,231 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:54:32,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-21 15:54:32,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/462747557/488cb9a66c574b3493dac500e63569d6/FLAGb8b9867f4 [2020-08-21 15:54:32,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/462747557/488cb9a66c574b3493dac500e63569d6 [2020-08-21 15:54:32,357 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:54:32,359 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:54:32,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:54:32,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:54:32,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:54:32,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:54:32" (1/1) ... [2020-08-21 15:54:32,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f6f757b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:54:32, skipping insertion in model container [2020-08-21 15:54:32,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:54:32" (1/1) ... [2020-08-21 15:54:32,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:54:32,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:54:34,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:54:34,023 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:54:35,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:54:35,080 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:54:35,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:54:35 WrapperNode [2020-08-21 15:54:35,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:54:35,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:54:35,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:54:35,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:54:35,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:54:35" (1/1) ... [2020-08-21 15:54:35,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:54:35" (1/1) ... [2020-08-21 15:54:35,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:54:35" (1/1) ... [2020-08-21 15:54:35,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:54:35" (1/1) ... [2020-08-21 15:54:35,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:54:35" (1/1) ... [2020-08-21 15:54:35,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:54:35" (1/1) ... [2020-08-21 15:54:35,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:54:35" (1/1) ... [2020-08-21 15:54:35,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:54:35,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:54:35,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:54:35,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:54:35,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:54:35" (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 [2020-08-21 15:54:35,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:54:35,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:54:35,417 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 15:54:35,417 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:54:35,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:54:35,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 15:54:35,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-21 15:54:35,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 15:54:35,419 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-21 15:54:35,419 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 15:54:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 15:54:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-21 15:54:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-21 15:54:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-21 15:54:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-21 15:54:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-21 15:54:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-21 15:54:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-21 15:54:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 15:54:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:54:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:54:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:54:38,763 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:54:38,763 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 15:54:38,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:54:38 BoogieIcfgContainer [2020-08-21 15:54:38,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:54:38,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:54:38,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:54:38,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:54:38,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:54:32" (1/3) ... [2020-08-21 15:54:38,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@674f7e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:54:38, skipping insertion in model container [2020-08-21 15:54:38,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:54:35" (2/3) ... [2020-08-21 15:54:38,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@674f7e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:54:38, skipping insertion in model container [2020-08-21 15:54:38,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:54:38" (3/3) ... [2020-08-21 15:54:38,793 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-21 15:54:38,804 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:54:38,820 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2020-08-21 15:54:38,837 INFO L251 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2020-08-21 15:54:38,874 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:54:38,875 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:54:38,875 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:54:38,875 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:54:38,875 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:54:38,875 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:54:38,876 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:54:38,876 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:54:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states. [2020-08-21 15:54:38,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-21 15:54:38,967 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:54:38,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:54:38,969 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:54:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:54:38,975 INFO L82 PathProgramCache]: Analyzing trace with hash -537993708, now seen corresponding path program 1 times [2020-08-21 15:54:38,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:54:38,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779085877] [2020-08-21 15:54:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:54:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:54:40,954 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-21 15:54:40,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:54:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:54:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:54:41,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779085877] [2020-08-21 15:54:41,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:54:41,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:54:41,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526652734] [2020-08-21 15:54:41,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:54:41,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:54:41,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:54:41,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:54:41,141 INFO L87 Difference]: Start difference. First operand 1027 states. Second operand 4 states. [2020-08-21 15:54:41,865 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-08-21 15:54:49,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:54:49,658 INFO L93 Difference]: Finished difference Result 1794 states and 3183 transitions. [2020-08-21 15:54:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:54:49,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-21 15:54:49,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:54:49,690 INFO L225 Difference]: With dead ends: 1794 [2020-08-21 15:54:49,691 INFO L226 Difference]: Without dead ends: 1483 [2020-08-21 15:54:49,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:54:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2020-08-21 15:54:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1481. [2020-08-21 15:54:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1481 states. [2020-08-21 15:54:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2263 transitions. [2020-08-21 15:54:49,855 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2263 transitions. Word has length 327 [2020-08-21 15:54:49,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:54:49,857 INFO L479 AbstractCegarLoop]: Abstraction has 1481 states and 2263 transitions. [2020-08-21 15:54:49,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:54:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2263 transitions. [2020-08-21 15:54:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-21 15:54:49,866 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:54:49,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:54:49,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:54:49,867 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:54:49,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:54:49,868 INFO L82 PathProgramCache]: Analyzing trace with hash 297127498, now seen corresponding path program 1 times [2020-08-21 15:54:49,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:54:49,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582288913] [2020-08-21 15:54:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:54:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:54:51,283 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 322 [2020-08-21 15:54:51,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:54:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:54:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:54:51,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582288913] [2020-08-21 15:54:51,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:54:51,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:54:51,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428238203] [2020-08-21 15:54:51,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:54:51,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:54:51,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:54:51,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:54:51,607 INFO L87 Difference]: Start difference. First operand 1481 states and 2263 transitions. Second operand 4 states. [2020-08-21 15:54:52,320 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-08-21 15:54:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:54:59,275 INFO L93 Difference]: Finished difference Result 2844 states and 4401 transitions. [2020-08-21 15:54:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:54:59,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-21 15:54:59,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:54:59,290 INFO L225 Difference]: With dead ends: 2844 [2020-08-21 15:54:59,291 INFO L226 Difference]: Without dead ends: 2425 [2020-08-21 15:54:59,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:54:59,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2020-08-21 15:54:59,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2423. [2020-08-21 15:54:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2423 states. [2020-08-21 15:54:59,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 3727 transitions. [2020-08-21 15:54:59,385 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 3727 transitions. Word has length 327 [2020-08-21 15:54:59,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:54:59,387 INFO L479 AbstractCegarLoop]: Abstraction has 2423 states and 3727 transitions. [2020-08-21 15:54:59,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:54:59,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 3727 transitions. [2020-08-21 15:54:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-21 15:54:59,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:54:59,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:54:59,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:54:59,404 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:54:59,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:54:59,404 INFO L82 PathProgramCache]: Analyzing trace with hash -586459585, now seen corresponding path program 1 times [2020-08-21 15:54:59,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:54:59,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159309957] [2020-08-21 15:54:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:54:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:55:00,525 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-21 15:55:00,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:55:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:55:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:55:00,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159309957] [2020-08-21 15:55:00,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:55:00,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:55:00,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246924376] [2020-08-21 15:55:00,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:55:00,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:55:00,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:55:00,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:55:00,698 INFO L87 Difference]: Start difference. First operand 2423 states and 3727 transitions. Second operand 4 states. [2020-08-21 15:55:01,365 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-08-21 15:55:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:55:08,239 INFO L93 Difference]: Finished difference Result 5038 states and 7854 transitions. [2020-08-21 15:55:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:55:08,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-21 15:55:08,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:55:08,268 INFO L225 Difference]: With dead ends: 5038 [2020-08-21 15:55:08,269 INFO L226 Difference]: Without dead ends: 4361 [2020-08-21 15:55:08,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:55:08,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2020-08-21 15:55:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 4359. [2020-08-21 15:55:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4359 states. [2020-08-21 15:55:08,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6733 transitions. [2020-08-21 15:55:08,414 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 6733 transitions. Word has length 327 [2020-08-21 15:55:08,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:55:08,415 INFO L479 AbstractCegarLoop]: Abstraction has 4359 states and 6733 transitions. [2020-08-21 15:55:08,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:55:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 6733 transitions. [2020-08-21 15:55:08,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-21 15:55:08,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:55:08,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:55:08,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:55:08,429 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:55:08,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:55:08,430 INFO L82 PathProgramCache]: Analyzing trace with hash -586798209, now seen corresponding path program 1 times [2020-08-21 15:55:08,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:55:08,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938694820] [2020-08-21 15:55:08,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:55:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:55:09,672 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-21 15:55:09,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:55:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:55:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:55:09,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938694820] [2020-08-21 15:55:09,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:55:09,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:55:09,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298085059] [2020-08-21 15:55:09,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:55:09,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:55:09,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:55:09,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:55:09,862 INFO L87 Difference]: Start difference. First operand 4359 states and 6733 transitions. Second operand 5 states. [2020-08-21 15:55:20,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:55:20,023 INFO L93 Difference]: Finished difference Result 12898 states and 19904 transitions. [2020-08-21 15:55:20,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:55:20,024 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-08-21 15:55:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:55:20,062 INFO L225 Difference]: With dead ends: 12898 [2020-08-21 15:55:20,062 INFO L226 Difference]: Without dead ends: 8554 [2020-08-21 15:55:20,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:55:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8554 states. [2020-08-21 15:55:20,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8554 to 8347. [2020-08-21 15:55:20,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8347 states. [2020-08-21 15:55:20,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 12864 transitions. [2020-08-21 15:55:20,323 INFO L78 Accepts]: Start accepts. Automaton has 8347 states and 12864 transitions. Word has length 327 [2020-08-21 15:55:20,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:55:20,324 INFO L479 AbstractCegarLoop]: Abstraction has 8347 states and 12864 transitions. [2020-08-21 15:55:20,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:55:20,324 INFO L276 IsEmpty]: Start isEmpty. Operand 8347 states and 12864 transitions. [2020-08-21 15:55:20,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-08-21 15:55:20,342 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:55:20,342 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] [2020-08-21 15:55:20,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:55:20,343 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:55:20,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:55:20,343 INFO L82 PathProgramCache]: Analyzing trace with hash 318218777, now seen corresponding path program 1 times [2020-08-21 15:55:20,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:55:20,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438803780] [2020-08-21 15:55:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:55:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:55:21,284 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-21 15:55:21,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:55:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:55:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:55:21,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438803780] [2020-08-21 15:55:21,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:55:21,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:55:21,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438565969] [2020-08-21 15:55:21,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:55:21,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:55:21,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:55:21,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:55:21,465 INFO L87 Difference]: Start difference. First operand 8347 states and 12864 transitions. Second operand 4 states.