/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 05:22:45,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 05:22:45,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 05:22:45,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 05:22:45,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:22:45,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:22:45,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:22:45,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:22:45,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:22:45,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:22:45,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:22:45,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:22:45,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:22:45,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:22:45,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:22:45,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:22:45,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:22:45,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:22:45,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:22:45,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:22:45,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:22:45,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:22:45,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:22:45,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:22:45,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 05:22:45,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 05:22:45,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 05:22:45,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 05:22:45,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 05:22:45,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 05:22:45,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 05:22:45,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 05:22:45,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 05:22:45,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 05:22:45,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 05:22:45,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 05:22:45,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 05:22:45,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 05:22:45,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:22:45,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:22:45,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:22:45,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 05:22:45,659 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:22:45,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:22:45,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:22:45,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:22:45,661 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:22:45,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:22:45,661 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:22:45,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:22:45,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:22:45,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:22:45,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:22:45,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:22:45,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:22:45,662 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:22:45,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:22:45,663 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:22:45,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:22:45,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:22:45,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:22:45,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:22:45,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:22:45,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:22:45,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:22:45,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:22:45,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:22:45,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:22:45,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:22:45,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:22:45,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:22:45,665 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=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; [2020-08-19 05:22:45,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:22:45,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:22:45,980 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:22:45,981 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:22:45,982 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:22:45,982 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-19 05:22:46,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e300b9b5/5e3a4ff54bcd4f1b94a29d52a615fa77/FLAG0b29523ed [2020-08-19 05:22:46,803 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:22:46,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-19 05:22:46,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e300b9b5/5e3a4ff54bcd4f1b94a29d52a615fa77/FLAG0b29523ed [2020-08-19 05:22:46,869 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e300b9b5/5e3a4ff54bcd4f1b94a29d52a615fa77 [2020-08-19 05:22:46,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:22:46,880 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:22:46,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:22:46,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:22:46,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:22:46,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:22:46" (1/1) ... [2020-08-19 05:22:46,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c6ecb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:22:46, skipping insertion in model container [2020-08-19 05:22:46,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:22:46" (1/1) ... [2020-08-19 05:22:46,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:22:47,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:22:49,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:22:49,550 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:22:51,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:22:51,192 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:22:51,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:22:51 WrapperNode [2020-08-19 05:22:51,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:22:51,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:22:51,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:22:51,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:22:51,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:22:51" (1/1) ... [2020-08-19 05:22:51,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:22:51" (1/1) ... [2020-08-19 05:22:51,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:22:51" (1/1) ... [2020-08-19 05:22:51,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:22:51" (1/1) ... [2020-08-19 05:22:51,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:22:51" (1/1) ... [2020-08-19 05:22:51,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:22:51" (1/1) ... [2020-08-19 05:22:51,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:22:51" (1/1) ... [2020-08-19 05:22:51,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:22:51,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:22:51,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:22:51,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:22:51,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:22:51" (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 [2020-08-19 05:22:51,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:22:51,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:22:51,590 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 05:22:51,591 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:22:51,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:22:51,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 05:22:51,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-19 05:22:51,592 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-19 05:22:51,592 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 05:22:51,593 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 05:22:51,593 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-19 05:22:51,593 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-19 05:22:51,593 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-19 05:22:51,593 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-19 05:22:51,593 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-19 05:22:51,594 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-19 05:22:51,595 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-19 05:22:51,595 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-19 05:22:51,595 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-19 05:22:51,595 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:22:51,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:22:51,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:22:57,614 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:22:57,615 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 05:22:57,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:22:57 BoogieIcfgContainer [2020-08-19 05:22:57,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:22:57,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:22:57,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:22:57,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:22:57,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:22:46" (1/3) ... [2020-08-19 05:22:57,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38771bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:22:57, skipping insertion in model container [2020-08-19 05:22:57,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:22:51" (2/3) ... [2020-08-19 05:22:57,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38771bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:22:57, skipping insertion in model container [2020-08-19 05:22:57,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:22:57" (3/3) ... [2020-08-19 05:22:57,646 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-08-19 05:22:57,657 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:22:57,668 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-19 05:22:57,682 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-19 05:22:57,715 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:22:57,715 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:22:57,715 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:22:57,715 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:22:57,716 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:22:57,716 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:22:57,716 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:22:57,716 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:22:57,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states. [2020-08-19 05:22:57,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-08-19 05:22:57,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:22:57,820 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] [2020-08-19 05:22:57,821 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:22:57,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:22:57,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1936618047, now seen corresponding path program 1 times [2020-08-19 05:22:57,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:22:57,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643551717] [2020-08-19 05:22:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:22:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:22:59,726 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification that was a NOOP. DAG size: 409 [2020-08-19 05:22:59,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:22:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:22:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:22:59,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643551717] [2020-08-19 05:22:59,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:22:59,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 05:22:59,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279847231] [2020-08-19 05:22:59,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 05:22:59,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:22:59,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 05:22:59,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 05:22:59,924 INFO L87 Difference]: Start difference. First operand 2515 states. Second operand 5 states. [2020-08-19 05:23:17,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:23:17,456 INFO L93 Difference]: Finished difference Result 4483 states and 7776 transitions. [2020-08-19 05:23:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 05:23:17,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 322 [2020-08-19 05:23:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:23:17,515 INFO L225 Difference]: With dead ends: 4483 [2020-08-19 05:23:17,515 INFO L226 Difference]: Without dead ends: 2511 [2020-08-19 05:23:17,536 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 [2020-08-19 05:23:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-08-19 05:23:17,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-08-19 05:23:17,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-08-19 05:23:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4317 transitions. [2020-08-19 05:23:17,754 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4317 transitions. Word has length 322 [2020-08-19 05:23:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:23:17,756 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4317 transitions. [2020-08-19 05:23:17,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 05:23:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4317 transitions. [2020-08-19 05:23:17,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-08-19 05:23:17,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:23:17,771 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:23:17,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:23:17,772 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:23:17,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:23:17,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1448784548, now seen corresponding path program 1 times [2020-08-19 05:23:17,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:23:17,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175995295] [2020-08-19 05:23:17,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:23:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:23:19,237 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 409 [2020-08-19 05:23:19,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:23:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:23:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:23:19,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175995295] [2020-08-19 05:23:19,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:23:19,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 05:23:19,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408184605] [2020-08-19 05:23:19,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 05:23:19,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:23:19,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 05:23:19,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 05:23:19,392 INFO L87 Difference]: Start difference. First operand 2511 states and 4317 transitions. Second operand 4 states. [2020-08-19 05:23:20,204 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 411 [2020-08-19 05:23:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:23:48,254 INFO L93 Difference]: Finished difference Result 6234 states and 10658 transitions. [2020-08-19 05:23:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 05:23:48,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 386 [2020-08-19 05:23:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:23:48,290 INFO L225 Difference]: With dead ends: 6234 [2020-08-19 05:23:48,290 INFO L226 Difference]: Without dead ends: 4315 [2020-08-19 05:23:48,296 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 [2020-08-19 05:23:48,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2020-08-19 05:23:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 4311. [2020-08-19 05:23:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4311 states. [2020-08-19 05:23:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4311 states to 4311 states and 7334 transitions. [2020-08-19 05:23:48,411 INFO L78 Accepts]: Start accepts. Automaton has 4311 states and 7334 transitions. Word has length 386 [2020-08-19 05:23:48,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:23:48,412 INFO L479 AbstractCegarLoop]: Abstraction has 4311 states and 7334 transitions. [2020-08-19 05:23:48,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 05:23:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4311 states and 7334 transitions. [2020-08-19 05:23:48,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-08-19 05:23:48,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:23:48,428 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:23:48,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:23:48,429 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:23:48,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:23:48,430 INFO L82 PathProgramCache]: Analyzing trace with hash 533740400, now seen corresponding path program 1 times [2020-08-19 05:23:48,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:23:48,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231302814] [2020-08-19 05:23:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:23:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat