/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=SHALLOWEST --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_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 19:55:39,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:55:39,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:55:40,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:55:40,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:55:40,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:55:40,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:55:40,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:55:40,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:55:40,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:55:40,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:55:40,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:55:40,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:55:40,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:55:40,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:55:40,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:55:40,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:55:40,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:55:40,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:55:40,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:55:40,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:55:40,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:55:40,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:55:40,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:55:40,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:55:40,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:55:40,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:55:40,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:55:40,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:55:40,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 19:55:40,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 19:55:40,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 19:55:40,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 19:55:40,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 19:55:40,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 19:55:40,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 19:55:40,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 19:55:40,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 19:55:40,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:55:40,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:55:40,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:55:40,091 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 19:55:40,124 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:55:40,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:55:40,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:55:40,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:55:40,126 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:55:40,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:55:40,127 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:55:40,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:55:40,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:55:40,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:55:40,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:55:40,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:55:40,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:55:40,129 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:55:40,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:55:40,130 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:55:40,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:55:40,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:55:40,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:55:40,130 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:55:40,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:55:40,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:55:40,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:55:40,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:55:40,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:55:40,133 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:55:40,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:55:40,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:55:40,134 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:55:40,134 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=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:55:40,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:55:40,445 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:55:40,449 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:55:40,451 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:55:40,453 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:55:40,454 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-21 19:55:40,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72ecf6dc5/95c7172f55594f1db2f7d7941fb62504/FLAG1dfa0a372 [2020-08-21 19:55:41,248 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:55:41,249 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-21 19:55:41,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72ecf6dc5/95c7172f55594f1db2f7d7941fb62504/FLAG1dfa0a372 [2020-08-21 19:55:41,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72ecf6dc5/95c7172f55594f1db2f7d7941fb62504 [2020-08-21 19:55:41,384 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:55:41,386 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:55:41,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:55:41,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:55:41,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:55:41,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:55:41" (1/1) ... [2020-08-21 19:55:41,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@612194b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:55:41, skipping insertion in model container [2020-08-21 19:55:41,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:55:41" (1/1) ... [2020-08-21 19:55:41,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:55:41,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:55:43,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:55:43,917 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:55:45,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:55:45,710 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:55:45,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:55:45 WrapperNode [2020-08-21 19:55:45,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:55:45,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:55:45,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:55:45,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:55:45,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:55:45" (1/1) ... [2020-08-21 19:55:45,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:55:45" (1/1) ... [2020-08-21 19:55:45,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:55:45" (1/1) ... [2020-08-21 19:55:45,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:55:45" (1/1) ... [2020-08-21 19:55:45,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:55:45" (1/1) ... [2020-08-21 19:55:45,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:55:45" (1/1) ... [2020-08-21 19:55:45,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:55:45" (1/1) ... [2020-08-21 19:55:45,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:55:45,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:55:45,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:55:45,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:55:45,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:55:45" (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 19:55:46,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:55:46,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:55:46,065 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 19:55:46,068 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:55:46,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:55:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 19:55:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 19:55:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-21 19:55:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 19:55:46,070 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 19:55:46,070 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-21 19:55:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-21 19:55:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-21 19:55:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-21 19:55:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-21 19:55:46,072 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-21 19:55:46,072 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-21 19:55:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-21 19:55:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 19:55:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:55:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:55:46,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:55:51,916 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:55:51,917 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 19:55:51,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:55:51 BoogieIcfgContainer [2020-08-21 19:55:51,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:55:51,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:55:51,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:55:51,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:55:51,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:55:41" (1/3) ... [2020-08-21 19:55:51,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae78bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:55:51, skipping insertion in model container [2020-08-21 19:55:51,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:55:45" (2/3) ... [2020-08-21 19:55:51,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae78bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:55:51, skipping insertion in model container [2020-08-21 19:55:51,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:55:51" (3/3) ... [2020-08-21 19:55:51,946 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-21 19:55:51,958 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:55:51,971 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-21 19:55:51,987 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-21 19:55:52,024 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:55:52,025 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:55:52,025 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:55:52,026 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:55:52,026 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:55:52,026 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:55:52,026 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:55:52,026 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:55:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states. [2020-08-21 19:55:52,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-08-21 19:55:52,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:55:52,127 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] [2020-08-21 19:55:52,128 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:55:52,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:55:52,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2040294362, now seen corresponding path program 1 times [2020-08-21 19:55:52,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:55:52,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231070866] [2020-08-21 19:55:52,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:55:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:54,371 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 394 [2020-08-21 19:55:54,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:55:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:54,638 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 19:55:54,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231070866] [2020-08-21 19:55:54,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:55:54,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:55:54,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135263152] [2020-08-21 19:55:54,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:55:54,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:55:54,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:55:54,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:55:54,682 INFO L87 Difference]: Start difference. First operand 2249 states. Second operand 5 states. [2020-08-21 19:56:10,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:56:10,386 INFO L93 Difference]: Finished difference Result 3956 states and 6884 transitions. [2020-08-21 19:56:10,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 19:56:10,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 290 [2020-08-21 19:56:10,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:56:10,447 INFO L225 Difference]: With dead ends: 3956 [2020-08-21 19:56:10,448 INFO L226 Difference]: Without dead ends: 2245 [2020-08-21 19:56:10,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:56:10,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-08-21 19:56:10,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-08-21 19:56:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-08-21 19:56:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3871 transitions. [2020-08-21 19:56:10,717 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3871 transitions. Word has length 290 [2020-08-21 19:56:10,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:56:10,721 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3871 transitions. [2020-08-21 19:56:10,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:56:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3871 transitions. [2020-08-21 19:56:10,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-08-21 19:56:10,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:56:10,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:56:10,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:56:10,741 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:56:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:56:10,742 INFO L82 PathProgramCache]: Analyzing trace with hash -875879150, now seen corresponding path program 1 times [2020-08-21 19:56:10,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:56:10,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827003676] [2020-08-21 19:56:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:56:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:56:12,153 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 394 [2020-08-21 19:56:12,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:56:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:56:12,623 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 19:56:12,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827003676] [2020-08-21 19:56:12,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:56:12,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 19:56:12,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340211574] [2020-08-21 19:56:12,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 19:56:12,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:56:12,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 19:56:12,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 19:56:12,630 INFO L87 Difference]: Start difference. First operand 2245 states and 3871 transitions. Second operand 4 states. [2020-08-21 19:56:13,474 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 396 [2020-08-21 19:56:36,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:56:36,450 INFO L93 Difference]: Finished difference Result 5464 states and 9356 transitions. [2020-08-21 19:56:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:56:36,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 349 [2020-08-21 19:56:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:56:36,479 INFO L225 Difference]: With dead ends: 5464 [2020-08-21 19:56:36,480 INFO L226 Difference]: Without dead ends: 3801 [2020-08-21 19:56:36,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:56:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2020-08-21 19:56:36,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3797. [2020-08-21 19:56:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3797 states. [2020-08-21 19:56:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 6464 transitions. [2020-08-21 19:56:36,607 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 6464 transitions. Word has length 349 [2020-08-21 19:56:36,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:56:36,609 INFO L479 AbstractCegarLoop]: Abstraction has 3797 states and 6464 transitions. [2020-08-21 19:56:36,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 19:56:36,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 6464 transitions. [2020-08-21 19:56:36,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-08-21 19:56:36,625 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:56:36,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:56:36,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:56:36,629 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:56:36,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:56:36,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1287553668, now seen corresponding path program 1 times [2020-08-21 19:56:36,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:56:36,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562370442] [2020-08-21 19:56:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:56:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:56:37,822 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-08-21 19:56:37,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:56:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:56:37,967 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 19:56:37,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562370442] [2020-08-21 19:56:37,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:56:37,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 19:56:37,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668050195] [2020-08-21 19:56:37,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 19:56:37,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:56:37,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 19:56:37,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 19:56:37,970 INFO L87 Difference]: Start difference. First operand 3797 states and 6464 transitions. Second operand 4 states.