/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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 [2020-08-22 04:01:46,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:01:46,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:01:46,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:01:46,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:01:46,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:01:46,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:01:46,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:01:46,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:01:46,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:01:46,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:01:46,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:01:46,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:01:46,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:01:46,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:01:46,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:01:46,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:01:46,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:01:46,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:01:46,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:01:46,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:01:46,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:01:46,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:01:46,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:01:46,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 04:01:46,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 04:01:46,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 04:01:46,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 04:01:46,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 04:01:46,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 04:01:46,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 04:01:46,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 04:01:46,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 04:01:46,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 04:01:46,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 04:01:46,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 04:01:46,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 04:01:46,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 04:01:46,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:01:46,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:01:46,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:01:46,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 04:01:46,987 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:01:46,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:01:46,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:01:46,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:01:46,990 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:01:46,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:01:46,991 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:01:46,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:01:46,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:01:46,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:01:46,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:01:46,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:01:46,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:01:46,993 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:01:46,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:01:46,994 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:01:46,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:01:46,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:01:46,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:01:46,994 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:01:46,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:01:46,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:01:46,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:01:46,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:01:46,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:01:46,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:01:46,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:01:46,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:01:46,996 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:01:46,997 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-08-22 04:01:47,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:01:47,298 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:01:47,301 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:01:47,303 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:01:47,303 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:01:47,304 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-22 04:01:47,388 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaf621d7d/c1a0948005d249998b4feec73a9a541e/FLAG2bcb7986e [2020-08-22 04:01:48,072 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:01:48,073 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-22 04:01:48,094 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaf621d7d/c1a0948005d249998b4feec73a9a541e/FLAG2bcb7986e [2020-08-22 04:01:48,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaf621d7d/c1a0948005d249998b4feec73a9a541e [2020-08-22 04:01:48,257 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:01:48,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:01:48,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:01:48,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:01:48,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:01:48,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:01:48" (1/1) ... [2020-08-22 04:01:48,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510a549d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:01:48, skipping insertion in model container [2020-08-22 04:01:48,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:01:48" (1/1) ... [2020-08-22 04:01:48,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:01:48,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:01:49,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:01:49,955 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:01:51,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:01:51,375 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:01:51,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:01:51 WrapperNode [2020-08-22 04:01:51,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:01:51,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:01:51,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:01:51,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:01:51,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:01:51" (1/1) ... [2020-08-22 04:01:51,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:01:51" (1/1) ... [2020-08-22 04:01:51,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:01:51" (1/1) ... [2020-08-22 04:01:51,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:01:51" (1/1) ... [2020-08-22 04:01:51,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:01:51" (1/1) ... [2020-08-22 04:01:51,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:01:51" (1/1) ... [2020-08-22 04:01:51,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:01:51" (1/1) ... [2020-08-22 04:01:51,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:01:51,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:01:51,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:01:51,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:01:51,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:01:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:01:51,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:01:51,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:01:51,682 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 04:01:51,682 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:01:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:01:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 04:01:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 04:01:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 04:01:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 04:01:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 04:01:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 04:01:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 04:01:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 04:01:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 04:01:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 04:01:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 04:01:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 04:01:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 04:01:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 04:01:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:01:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:01:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:01:54,843 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:01:54,843 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 04:01:54,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:01:54 BoogieIcfgContainer [2020-08-22 04:01:54,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:01:54,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:01:54,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:01:54,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:01:54,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:01:48" (1/3) ... [2020-08-22 04:01:54,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@665a5d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:01:54, skipping insertion in model container [2020-08-22 04:01:54,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:01:51" (2/3) ... [2020-08-22 04:01:54,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@665a5d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:01:54, skipping insertion in model container [2020-08-22 04:01:54,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:01:54" (3/3) ... [2020-08-22 04:01:54,872 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-22 04:01:54,883 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:01:54,896 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2020-08-22 04:01:54,910 INFO L251 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2020-08-22 04:01:54,945 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:01:54,945 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:01:54,946 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:01:54,946 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:01:54,946 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:01:54,946 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:01:54,946 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:01:54,946 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:01:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states. [2020-08-22 04:01:55,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-22 04:01:55,042 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:01:55,044 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] [2020-08-22 04:01:55,045 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]=== [2020-08-22 04:01:55,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:01:55,051 INFO L82 PathProgramCache]: Analyzing trace with hash -537993708, now seen corresponding path program 1 times [2020-08-22 04:01:55,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:01:55,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256729841] [2020-08-22 04:01:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:01:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:01:56,851 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-22 04:01:56,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:01:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:01:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:01:57,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256729841] [2020-08-22 04:01:57,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:01:57,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:01:57,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849686268] [2020-08-22 04:01:57,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:01:57,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:01:57,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:01:57,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:01:57,273 INFO L87 Difference]: Start difference. First operand 1027 states. Second operand 4 states. [2020-08-22 04:01:57,967 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-08-22 04:02:05,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:02:05,524 INFO L93 Difference]: Finished difference Result 1794 states and 3183 transitions. [2020-08-22 04:02:05,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:02:05,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-22 04:02:05,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:02:05,560 INFO L225 Difference]: With dead ends: 1794 [2020-08-22 04:02:05,560 INFO L226 Difference]: Without dead ends: 1483 [2020-08-22 04:02:05,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:02:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2020-08-22 04:02:05,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1481. [2020-08-22 04:02:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1481 states. [2020-08-22 04:02:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2263 transitions. [2020-08-22 04:02:05,732 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2263 transitions. Word has length 327 [2020-08-22 04:02:05,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:02:05,733 INFO L479 AbstractCegarLoop]: Abstraction has 1481 states and 2263 transitions. [2020-08-22 04:02:05,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:02:05,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2263 transitions. [2020-08-22 04:02:05,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-22 04:02:05,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:02:05,743 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] [2020-08-22 04:02:05,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:02:05,744 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]=== [2020-08-22 04:02:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:02:05,744 INFO L82 PathProgramCache]: Analyzing trace with hash 297127498, now seen corresponding path program 1 times [2020-08-22 04:02:05,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:02:05,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222867927] [2020-08-22 04:02:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:02:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:02:06,940 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-22 04:02:06,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:02:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:02:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:02:07,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222867927] [2020-08-22 04:02:07,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:02:07,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:02:07,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943919430] [2020-08-22 04:02:07,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:02:07,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:02:07,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:02:07,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:02:07,230 INFO L87 Difference]: Start difference. First operand 1481 states and 2263 transitions. Second operand 4 states. [2020-08-22 04:02:07,863 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-08-22 04:02:14,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:02:14,419 INFO L93 Difference]: Finished difference Result 2844 states and 4401 transitions. [2020-08-22 04:02:14,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:02:14,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-22 04:02:14,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:02:14,439 INFO L225 Difference]: With dead ends: 2844 [2020-08-22 04:02:14,439 INFO L226 Difference]: Without dead ends: 2425 [2020-08-22 04:02:14,443 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 [2020-08-22 04:02:14,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2020-08-22 04:02:14,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2423. [2020-08-22 04:02:14,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2423 states. [2020-08-22 04:02:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 3727 transitions. [2020-08-22 04:02:14,560 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 3727 transitions. Word has length 327 [2020-08-22 04:02:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:02:14,561 INFO L479 AbstractCegarLoop]: Abstraction has 2423 states and 3727 transitions. [2020-08-22 04:02:14,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:02:14,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 3727 transitions. [2020-08-22 04:02:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-22 04:02:14,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:02:14,574 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] [2020-08-22 04:02:14,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:02:14,575 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]=== [2020-08-22 04:02:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:02:14,576 INFO L82 PathProgramCache]: Analyzing trace with hash -586459585, now seen corresponding path program 1 times [2020-08-22 04:02:14,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:02:14,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248343027] [2020-08-22 04:02:14,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:02:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:02:15,580 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-22 04:02:15,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:02:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:02:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:02:15,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248343027] [2020-08-22 04:02:15,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:02:15,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:02:15,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11759305] [2020-08-22 04:02:15,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:02:15,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:02:15,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:02:15,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:02:15,757 INFO L87 Difference]: Start difference. First operand 2423 states and 3727 transitions. Second operand 4 states. [2020-08-22 04:02:16,323 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-08-22 04:02:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:02:22,695 INFO L93 Difference]: Finished difference Result 5038 states and 7854 transitions. [2020-08-22 04:02:22,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:02:22,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-22 04:02:22,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:02:22,719 INFO L225 Difference]: With dead ends: 5038 [2020-08-22 04:02:22,719 INFO L226 Difference]: Without dead ends: 4361 [2020-08-22 04:02:22,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:02:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2020-08-22 04:02:22,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 4359. [2020-08-22 04:02:22,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4359 states. [2020-08-22 04:02:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6733 transitions. [2020-08-22 04:02:22,857 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 6733 transitions. Word has length 327 [2020-08-22 04:02:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:02:22,858 INFO L479 AbstractCegarLoop]: Abstraction has 4359 states and 6733 transitions. [2020-08-22 04:02:22,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:02:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 6733 transitions. [2020-08-22 04:02:22,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-22 04:02:22,909 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:02:22,909 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] [2020-08-22 04:02:22,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:02:22,910 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]=== [2020-08-22 04:02:22,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:02:22,910 INFO L82 PathProgramCache]: Analyzing trace with hash -586798209, now seen corresponding path program 1 times [2020-08-22 04:02:22,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:02:22,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568984263] [2020-08-22 04:02:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:02:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:02:24,038 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-22 04:02:24,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:02:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:02:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:02:24,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568984263] [2020-08-22 04:02:24,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:02:24,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:02:24,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415097838] [2020-08-22 04:02:24,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:02:24,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:02:24,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:02:24,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:02:24,254 INFO L87 Difference]: Start difference. First operand 4359 states and 6733 transitions. Second operand 5 states. [2020-08-22 04:02:34,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:02:34,440 INFO L93 Difference]: Finished difference Result 12898 states and 19904 transitions. [2020-08-22 04:02:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:02:34,442 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-08-22 04:02:34,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:02:34,484 INFO L225 Difference]: With dead ends: 12898 [2020-08-22 04:02:34,484 INFO L226 Difference]: Without dead ends: 8554 [2020-08-22 04:02:34,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:02:34,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8554 states. [2020-08-22 04:02:34,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8554 to 8347. [2020-08-22 04:02:34,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8347 states. [2020-08-22 04:02:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 12864 transitions. [2020-08-22 04:02:34,857 INFO L78 Accepts]: Start accepts. Automaton has 8347 states and 12864 transitions. Word has length 327 [2020-08-22 04:02:34,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:02:34,858 INFO L479 AbstractCegarLoop]: Abstraction has 8347 states and 12864 transitions. [2020-08-22 04:02:34,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:02:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 8347 states and 12864 transitions. [2020-08-22 04:02:34,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-08-22 04:02:34,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:02:34,887 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] [2020-08-22 04:02:34,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:02:34,887 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]=== [2020-08-22 04:02:34,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:02:34,888 INFO L82 PathProgramCache]: Analyzing trace with hash 318218777, now seen corresponding path program 1 times [2020-08-22 04:02:34,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:02:34,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068830069] [2020-08-22 04:02:34,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:02:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:02:35,700 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-22 04:02:35,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:02:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:02:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:02:35,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068830069] [2020-08-22 04:02:35,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:02:35,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:02:35,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79900582] [2020-08-22 04:02:35,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:02:35,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:02:35,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:02:35,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:02:35,870 INFO L87 Difference]: Start difference. First operand 8347 states and 12864 transitions. Second operand 4 states. [2020-08-22 04:02:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:02:47,409 INFO L93 Difference]: Finished difference Result 24596 states and 37840 transitions. [2020-08-22 04:02:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 04:02:47,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-08-22 04:02:47,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:02:47,476 INFO L225 Difference]: With dead ends: 24596 [2020-08-22 04:02:47,476 INFO L226 Difference]: Without dead ends: 16378 [2020-08-22 04:02:47,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:02:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16378 states.