/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=LOWLEXORDER -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 0.1.25-5644d1e-m [2020-08-18 18:51:43,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:51:43,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:51:44,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:51:44,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:51:44,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:51:44,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:51:44,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:51:44,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:51:44,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:51:44,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:51:44,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:51:44,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:51:44,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:51:44,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:51:44,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:51:44,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:51:44,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:51:44,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:51:44,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:51:44,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:51:44,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:51:44,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:51:44,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:51:44,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:51:44,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:51:44,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:51:44,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:51:44,092 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 [2020-08-18 18:51:44,112 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:51:44,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:51:44,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:51:44,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:51:44,114 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:51:44,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:51:44,115 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:51:44,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:51:44,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:51:44,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:51:44,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:51:44,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:51:44,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:51:44,116 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:51:44,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:51:44,116 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:51:44,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:51:44,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:51:44,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:51:44,117 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:51:44,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:51:44,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:51:44,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:51:44,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:51:44,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:51:44,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:51:44,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:51:44,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:51:44,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:51:44,119 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=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:51:44,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:51:44,431 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:51:44,434 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:51:44,435 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:51:44,436 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:51:44,437 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-18 18:51:44,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f3eb23dc/f04f8e4de71449a285ce7191b59f5566/FLAG760894aa3 [2020-08-18 18:51:45,140 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:51:45,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-18 18:51:45,178 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f3eb23dc/f04f8e4de71449a285ce7191b59f5566/FLAG760894aa3 [2020-08-18 18:51:45,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f3eb23dc/f04f8e4de71449a285ce7191b59f5566 [2020-08-18 18:51:45,267 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:51:45,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:51:45,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:51:45,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:51:45,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:51:45,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:51:45" (1/1) ... [2020-08-18 18:51:45,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6b7cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:45, skipping insertion in model container [2020-08-18 18:51:45,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:51:45" (1/1) ... [2020-08-18 18:51:45,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:51:45,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:51:47,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:51:47,582 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:51:49,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:51:49,198 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:51:49,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:49 WrapperNode [2020-08-18 18:51:49,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:51:49,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:51:49,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:51:49,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:51:49,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:49" (1/1) ... [2020-08-18 18:51:49,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:49" (1/1) ... [2020-08-18 18:51:49,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:49" (1/1) ... [2020-08-18 18:51:49,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:49" (1/1) ... [2020-08-18 18:51:49,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:49" (1/1) ... [2020-08-18 18:51:49,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:49" (1/1) ... [2020-08-18 18:51:49,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:49" (1/1) ... [2020-08-18 18:51:49,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:51:49,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:51:49,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:51:49,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:51:49,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:49" (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 [2020-08-18 18:51:49,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:51:49,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:51:49,611 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 18:51:49,611 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:51:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:51:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 18:51:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 18:51:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 18:51:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 18:51:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 18:51:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 18:51:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 18:51:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 18:51:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 18:51:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 18:51:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 18:51:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-18 18:51:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 18:51:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 18:51:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:51:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:51:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:51:54,967 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:51:54,968 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 18:51:54,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:51:54 BoogieIcfgContainer [2020-08-18 18:51:54,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:51:54,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:51:54,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:51:54,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:51:54,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:51:45" (1/3) ... [2020-08-18 18:51:54,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9395d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:51:54, skipping insertion in model container [2020-08-18 18:51:54,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:51:49" (2/3) ... [2020-08-18 18:51:54,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9395d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:51:54, skipping insertion in model container [2020-08-18 18:51:54,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:51:54" (3/3) ... [2020-08-18 18:51:54,994 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-18 18:51:55,003 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:51:55,017 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-18 18:51:55,029 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-18 18:51:55,060 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:51:55,060 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:51:55,060 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:51:55,060 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:51:55,061 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:51:55,061 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:51:55,061 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:51:55,061 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:51:55,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states. [2020-08-18 18:51:55,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-08-18 18:51:55,153 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:55,154 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] [2020-08-18 18:51:55,154 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:55,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2040294362, now seen corresponding path program 1 times [2020-08-18 18:51:55,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:55,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966296476] [2020-08-18 18:51:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:56,876 WARN L193 SmtUtils]: Spent 839.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-08-18 18:51:56,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:51:57,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966296476] [2020-08-18 18:51:57,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:51:57,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:51:57,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317533767] [2020-08-18 18:51:57,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:51:57,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:57,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:51:57,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:51:57,078 INFO L87 Difference]: Start difference. First operand 2249 states. Second operand 5 states. [2020-08-18 18:52:11,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:52:11,356 INFO L93 Difference]: Finished difference Result 3956 states and 6884 transitions. [2020-08-18 18:52:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 18:52:11,359 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 290 [2020-08-18 18:52:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:52:11,395 INFO L225 Difference]: With dead ends: 3956 [2020-08-18 18:52:11,395 INFO L226 Difference]: Without dead ends: 2245 [2020-08-18 18:52:11,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:52:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-08-18 18:52:11,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-08-18 18:52:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-08-18 18:52:11,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3871 transitions. [2020-08-18 18:52:11,590 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3871 transitions. Word has length 290 [2020-08-18 18:52:11,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:52:11,593 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3871 transitions. [2020-08-18 18:52:11,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:52:11,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3871 transitions. [2020-08-18 18:52:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-08-18 18:52:11,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:52:11,612 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] [2020-08-18 18:52:11,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:52:11,613 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:52:11,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:52:11,614 INFO L82 PathProgramCache]: Analyzing trace with hash -875879150, now seen corresponding path program 1 times [2020-08-18 18:52:11,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:52:11,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280369635] [2020-08-18 18:52:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:52:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:13,248 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 394 [2020-08-18 18:52:13,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:52:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:52:13,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280369635] [2020-08-18 18:52:13,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:52:13,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:52:13,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216560254] [2020-08-18 18:52:13,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:52:13,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:52:13,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:52:13,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:52:13,465 INFO L87 Difference]: Start difference. First operand 2245 states and 3871 transitions. Second operand 4 states. [2020-08-18 18:52:14,238 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 396 [2020-08-18 18:52:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:52:35,813 INFO L93 Difference]: Finished difference Result 5464 states and 9356 transitions. [2020-08-18 18:52:35,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:52:35,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 349 [2020-08-18 18:52:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:52:35,836 INFO L225 Difference]: With dead ends: 5464 [2020-08-18 18:52:35,836 INFO L226 Difference]: Without dead ends: 3801 [2020-08-18 18:52:35,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:52:35,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2020-08-18 18:52:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3797. [2020-08-18 18:52:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3797 states. [2020-08-18 18:52:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 6464 transitions. [2020-08-18 18:52:35,963 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 6464 transitions. Word has length 349 [2020-08-18 18:52:35,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:52:35,964 INFO L479 AbstractCegarLoop]: Abstraction has 3797 states and 6464 transitions. [2020-08-18 18:52:35,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:52:35,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 6464 transitions. [2020-08-18 18:52:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-08-18 18:52:35,977 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:52:35,978 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] [2020-08-18 18:52:35,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:52:35,982 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:52:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:52:35,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1287553668, now seen corresponding path program 1 times [2020-08-18 18:52:35,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:52:35,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091244628] [2020-08-18 18:52:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:52:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:37,009 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-08-18 18:52:37,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:52:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:52:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:52:37,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091244628] [2020-08-18 18:52:37,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:52:37,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:52:37,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78026554] [2020-08-18 18:52:37,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:52:37,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:52:37,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:52:37,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:52:37,207 INFO L87 Difference]: Start difference. First operand 3797 states and 6464 transitions. Second operand 4 states. [2020-08-18 18:52:37,961 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 398