/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s4iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 01:09:14,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:09:14,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:09:14,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:09:14,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:09:14,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:09:14,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:09:14,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:09:14,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:09:14,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:09:14,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:09:14,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:09:14,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:09:14,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:09:14,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:09:14,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:09:14,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:09:14,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:09:14,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:09:14,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:09:14,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:09:14,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:09:14,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:09:14,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:09:14,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:09:14,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:09:14,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:09:14,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:09:14,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:09:14,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:09:14,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:09:14,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:09:14,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:09:14,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:09:14,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:09:14,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:09:14,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:09:14,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:09:14,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:09:14,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:09:14,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:09:14,791 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 [2020-09-25 01:09:14,822 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:09:14,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:09:14,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:09:14,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:09:14,825 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:09:14,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:09:14,825 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:09:14,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:09:14,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:09:14,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:09:14,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:09:14,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:09:14,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:09:14,827 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:09:14,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:09:14,827 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:09:14,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:09:14,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:09:14,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:09:14,828 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:09:14,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:09:14,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:09:14,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:09:14,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:09:14,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:09:14,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:09:14,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:09:14,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:09:14,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:09:14,830 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-09-25 01:09:15,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:09:15,429 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:09:15,436 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:09:15,438 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:09:15,439 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:09:15,440 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c [2020-09-25 01:09:15,596 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62d4d5c22/7c244644738d4f8aa38f620e535fa795/FLAG4577fbddf [2020-09-25 01:09:16,289 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:09:16,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s4iff.c [2020-09-25 01:09:16,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62d4d5c22/7c244644738d4f8aa38f620e535fa795/FLAG4577fbddf [2020-09-25 01:09:16,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62d4d5c22/7c244644738d4f8aa38f620e535fa795 [2020-09-25 01:09:16,353 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:09:16,364 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:09:16,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:16,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:09:16,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:09:16,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:16" (1/1) ... [2020-09-25 01:09:16,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5335cf9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:16, skipping insertion in model container [2020-09-25 01:09:16,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:16" (1/1) ... [2020-09-25 01:09:16,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:09:16,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:09:16,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:16,733 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:09:16,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:16,877 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:09:16,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:16 WrapperNode [2020-09-25 01:09:16,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:16,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:09:16,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:09:16,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:09:16,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:16" (1/1) ... [2020-09-25 01:09:16,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:16" (1/1) ... [2020-09-25 01:09:16,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:16" (1/1) ... [2020-09-25 01:09:16,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:16" (1/1) ... [2020-09-25 01:09:16,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:16" (1/1) ... [2020-09-25 01:09:16,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:16" (1/1) ... [2020-09-25 01:09:16,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:16" (1/1) ... [2020-09-25 01:09:16,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:09:16,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:09:16,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:09:16,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:09:16,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:16" (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 [2020-09-25 01:09:17,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:09:17,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:09:17,007 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 01:09:17,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 01:09:17,008 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:09:17,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:09:17,008 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 01:09:17,008 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 01:09:17,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 01:09:17,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 01:09:17,010 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 01:09:17,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:09:17,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 01:09:17,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 01:09:17,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 01:09:17,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 01:09:17,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 01:09:17,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:09:17,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:09:17,394 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:09:17,394 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 01:09:17,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:09:17 BoogieIcfgContainer [2020-09-25 01:09:17,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:09:17,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:09:17,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:09:17,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:09:17,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:09:16" (1/3) ... [2020-09-25 01:09:17,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40aa32a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:09:17, skipping insertion in model container [2020-09-25 01:09:17,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:16" (2/3) ... [2020-09-25 01:09:17,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40aa32a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:09:17, skipping insertion in model container [2020-09-25 01:09:17,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:09:17" (3/3) ... [2020-09-25 01:09:17,409 INFO L109 eAbstractionObserver]: Analyzing ICFG s4iff.c [2020-09-25 01:09:17,421 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:09:17,430 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 01:09:17,451 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 01:09:17,481 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:09:17,482 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:09:17,482 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:09:17,482 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:09:17,482 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:09:17,482 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:09:17,482 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:09:17,482 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:09:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-09-25 01:09:17,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 01:09:17,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:17,513 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] [2020-09-25 01:09:17,513 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:17,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:17,520 INFO L82 PathProgramCache]: Analyzing trace with hash 171473808, now seen corresponding path program 1 times [2020-09-25 01:09:17,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:17,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123863130] [2020-09-25 01:09:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:17,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:17,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:17,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:17,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 01:09:17,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:17,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-09-25 01:09:17,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:17,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:17,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 01:09:17,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:17,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 01:09:18,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:18,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:18,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:18,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 01:09:18,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:18,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 01:09:18,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:18,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:18,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:18,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:18,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:18,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 01:09:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:18,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:18,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:18,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 01:09:18,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:18,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 01:09:18,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:18,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:18,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:18,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:18,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:18,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123863130] [2020-09-25 01:09:18,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:18,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 01:09:18,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220618909] [2020-09-25 01:09:18,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 01:09:18,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:18,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 01:09:18,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 01:09:18,145 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2020-09-25 01:09:18,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:18,323 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2020-09-25 01:09:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 01:09:18,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-25 01:09:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:18,337 INFO L225 Difference]: With dead ends: 113 [2020-09-25 01:09:18,338 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 01:09:18,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 01:09:18,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 01:09:18,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-25 01:09:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 01:09:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-09-25 01:09:18,398 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 31 [2020-09-25 01:09:18,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:18,399 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-09-25 01:09:18,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 01:09:18,399 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-09-25 01:09:18,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 01:09:18,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:18,401 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] [2020-09-25 01:09:18,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:09:18,401 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:18,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:18,402 INFO L82 PathProgramCache]: Analyzing trace with hash 921692051, now seen corresponding path program 1 times [2020-09-25 01:09:18,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:18,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176377061] [2020-09-25 01:09:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:18,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:18,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:18,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:18,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 01:09:18,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:18,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-09-25 01:09:18,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:18,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 01:09:18,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 01:09:18,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 01:09:18,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:18,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:18,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:18,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:18,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 01:09:18,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:18,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 01:09:18,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:18,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:18,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:18,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:18,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:18,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 01:09:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:18,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:18,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:18,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 01:09:18,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:18,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 01:09:18,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:09:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 01:09:18,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:18,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176377061] [2020-09-25 01:09:18,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:18,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 01:09:18,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687042098] [2020-09-25 01:09:18,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 01:09:18,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:18,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 01:09:18,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:09:18,960 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 5 states. [2020-09-25 01:09:19,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:19,136 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2020-09-25 01:09:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 01:09:19,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-25 01:09:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:19,138 INFO L225 Difference]: With dead ends: 80 [2020-09-25 01:09:19,138 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 01:09:19,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 01:09:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 01:09:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-25 01:09:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-25 01:09:19,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-09-25 01:09:19,150 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 31 [2020-09-25 01:09:19,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:19,151 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-09-25 01:09:19,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 01:09:19,151 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-09-25 01:09:19,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 01:09:19,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:19,153 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] [2020-09-25 01:09:19,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:09:19,153 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:19,154 INFO L82 PathProgramCache]: Analyzing trace with hash -827220298, now seen corresponding path program 1 times [2020-09-25 01:09:19,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:19,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627779827] [2020-09-25 01:09:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:19,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:19,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:19,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:20,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:20,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:21,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:21,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:22,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:22,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:24,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:24,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 01:09:24,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 01:09:24,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 01:09:24,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:24,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 01:09:24,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 01:09:24,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 01:09:24,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:25,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:25,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:25,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:25,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 01:09:25,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:25,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 01:09:25,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:25,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:25,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:25,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:25,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:25,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 01:09:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:25,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:25,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:25,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 01:09:25,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:25,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 01:09:25,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:25,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:25,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:25,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:25,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:25,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627779827] [2020-09-25 01:09:25,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:25,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 01:09:25,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544001277] [2020-09-25 01:09:25,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 01:09:25,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:25,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 01:09:25,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-09-25 01:09:25,075 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 21 states. [2020-09-25 01:09:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:26,318 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2020-09-25 01:09:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 01:09:26,321 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-09-25 01:09:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:26,323 INFO L225 Difference]: With dead ends: 84 [2020-09-25 01:09:26,323 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 01:09:26,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=308, Invalid=1332, Unknown=0, NotChecked=0, Total=1640 [2020-09-25 01:09:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 01:09:26,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2020-09-25 01:09:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 01:09:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-09-25 01:09:26,342 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 48 [2020-09-25 01:09:26,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:26,343 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-09-25 01:09:26,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 01:09:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-09-25 01:09:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 01:09:26,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:26,345 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] [2020-09-25 01:09:26,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:09:26,346 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:26,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:26,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1272927570, now seen corresponding path program 1 times [2020-09-25 01:09:26,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:26,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200607508] [2020-09-25 01:09:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:26,362 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-25 01:09:26,362 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-09-25 01:09:26,362 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 01:09:26,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 01:09:26,390 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-09-25 01:09:26,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:09:26 BoogieIcfgContainer [2020-09-25 01:09:26,390 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 01:09:26,394 INFO L168 Benchmark]: Toolchain (without parser) took 10037.75 ms. Allocated memory was 140.0 MB in the beginning and 277.9 MB in the end (delta: 137.9 MB). Free memory was 103.1 MB in the beginning and 99.6 MB in the end (delta: 3.5 MB). Peak memory consumption was 141.4 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:26,395 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-25 01:09:26,396 INFO L168 Benchmark]: CACSL2BoogieTranslator took 510.24 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.6 MB in the beginning and 180.7 MB in the end (delta: -78.0 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:26,397 INFO L168 Benchmark]: Boogie Preprocessor took 56.55 ms. Allocated memory is still 202.4 MB. Free memory was 180.7 MB in the beginning and 178.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:26,398 INFO L168 Benchmark]: RCFGBuilder took 464.12 ms. Allocated memory is still 202.4 MB. Free memory was 178.4 MB in the beginning and 159.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:26,399 INFO L168 Benchmark]: TraceAbstraction took 8989.33 ms. Allocated memory was 202.4 MB in the beginning and 277.9 MB in the end (delta: 75.5 MB). Free memory was 158.8 MB in the beginning and 99.6 MB in the end (delta: 59.2 MB). Peak memory consumption was 134.7 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:26,403 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 510.24 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.6 MB in the beginning and 180.7 MB in the end (delta: -78.0 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.55 ms. Allocated memory is still 202.4 MB. Free memory was 180.7 MB in the beginning and 178.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 464.12 ms. Allocated memory is still 202.4 MB. Free memory was 178.4 MB in the beginning and 159.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8989.33 ms. Allocated memory was 202.4 MB in the beginning and 277.9 MB in the end (delta: 75.5 MB). Free memory was 158.8 MB in the beginning and 99.6 MB in the end (delta: 59.2 MB). Peak memory consumption was 134.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 [L30] COND TRUE i