/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/string-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:58:33,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:58:33,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:58:33,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:58:33,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:58:33,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:58:33,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:58:33,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:58:33,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:58:33,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:58:33,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:58:33,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:58:33,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:58:33,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:58:33,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:58:33,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:58:33,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:58:33,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:58:33,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:58:33,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:58:33,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:58:33,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:58:33,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:58:33,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:58:33,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:58:33,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:58:33,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:58:33,567 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:58:33,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:58:33,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:58:33,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:58:33,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:58:33,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:58:33,574 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:58:33,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:58:33,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:58:33,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:58:33,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:58:33,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:58:33,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:58:33,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:58:33,581 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 [2020-10-27 01:58:33,640 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:58:33,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:58:33,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:58:33,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:58:33,646 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:58:33,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:58:33,647 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:58:33,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:58:33,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:58:33,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:58:33,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:58:33,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:58:33,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:58:33,648 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:58:33,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:58:33,649 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:58:33,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:58:33,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:58:33,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:58:33,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:58:33,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:58:33,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:58:33,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:58:33,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:58:33,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:58:33,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:58:33,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:58:33,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:58:33,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:58:33,653 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:58:34,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:58:34,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:58:34,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:58:34,087 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:58:34,088 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:58:34,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-2.i [2020-10-27 01:58:34,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82be6d5d3/457448c6cec44b308e2c245be99595dd/FLAGa90522f46 [2020-10-27 01:58:34,814 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:58:34,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-2.i [2020-10-27 01:58:34,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82be6d5d3/457448c6cec44b308e2c245be99595dd/FLAGa90522f46 [2020-10-27 01:58:35,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82be6d5d3/457448c6cec44b308e2c245be99595dd [2020-10-27 01:58:35,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:58:35,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:58:35,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:58:35,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:58:35,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:58:35,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:58:35" (1/1) ... [2020-10-27 01:58:35,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@144566e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:35, skipping insertion in model container [2020-10-27 01:58:35,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:58:35" (1/1) ... [2020-10-27 01:58:35,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:58:35,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:58:35,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:58:35,471 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:58:35,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:58:35,515 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:58:35,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:35 WrapperNode [2020-10-27 01:58:35,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:58:35,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:58:35,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:58:35,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:58:35,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:35" (1/1) ... [2020-10-27 01:58:35,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:35" (1/1) ... [2020-10-27 01:58:35,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:35" (1/1) ... [2020-10-27 01:58:35,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:35" (1/1) ... [2020-10-27 01:58:35,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:35" (1/1) ... [2020-10-27 01:58:35,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:35" (1/1) ... [2020-10-27 01:58:35,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:35" (1/1) ... [2020-10-27 01:58:35,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:58:35,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:58:35,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:58:35,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:58:35,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:35" (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 [2020-10-27 01:58:35,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:58:35,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:58:35,669 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:58:35,670 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:58:35,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:58:35,670 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:58:35,670 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:58:35,670 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:58:35,671 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:58:35,671 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:58:35,671 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:58:35,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:58:35,671 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:58:35,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:58:35,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 01:58:35,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:58:35,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:58:35,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:58:35,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:58:35,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:58:35,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:58:35,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:58:36,074 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:58:36,075 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 01:58:36,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:58:36 BoogieIcfgContainer [2020-10-27 01:58:36,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:58:36,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:58:36,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:58:36,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:58:36,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:58:35" (1/3) ... [2020-10-27 01:58:36,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2a053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:58:36, skipping insertion in model container [2020-10-27 01:58:36,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:35" (2/3) ... [2020-10-27 01:58:36,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2a053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:58:36, skipping insertion in model container [2020-10-27 01:58:36,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:58:36" (3/3) ... [2020-10-27 01:58:36,089 INFO L111 eAbstractionObserver]: Analyzing ICFG string-2.i [2020-10-27 01:58:36,112 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:58:36,124 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:58:36,159 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:58:36,200 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:58:36,200 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:58:36,200 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:58:36,200 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:58:36,201 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:58:36,201 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:58:36,201 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:58:36,201 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:58:36,223 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-27 01:58:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:58:36,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:36,233 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] [2020-10-27 01:58:36,234 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:36,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1881354354, now seen corresponding path program 1 times [2020-10-27 01:58:36,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:36,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535547043] [2020-10-27 01:58:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:36,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:36,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:36,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:36,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:36,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:36,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:36,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:58:36,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:58:36,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 551 [2020-10-27 01:58:36,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:36,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:58:36,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:36,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:58:36,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:58:37,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:37,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:37,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:37,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:37,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 01:58:37,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:37,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:37,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:37,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:37,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:37,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535547043] [2020-10-27 01:58:37,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:58:37,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:58:37,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122804242] [2020-10-27 01:58:37,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:58:37,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:37,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:58:37,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:58:37,208 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-10-27 01:58:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:37,456 INFO L93 Difference]: Finished difference Result 80 states and 119 transitions. [2020-10-27 01:58:37,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:58:37,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 01:58:37,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:37,468 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:58:37,469 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:58:37,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:58:37,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:58:37,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-10-27 01:58:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:58:37,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-27 01:58:37,519 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 24 [2020-10-27 01:58:37,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:37,520 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-27 01:58:37,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:58:37,520 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-27 01:58:37,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:58:37,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:37,522 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] [2020-10-27 01:58:37,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:58:37,523 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:37,524 INFO L82 PathProgramCache]: Analyzing trace with hash -607743226, now seen corresponding path program 1 times [2020-10-27 01:58:37,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:37,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007838416] [2020-10-27 01:58:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:37,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:38,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:38,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:58:38,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:58:38,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-27 01:58:38,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:58:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:58:38,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:58:38,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:38,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:38,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:38,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:38,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:38,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:58:38,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:38,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:38,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:38,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:38,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:58:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:58:38,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007838416] [2020-10-27 01:58:38,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:38,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:58:38,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117242471] [2020-10-27 01:58:38,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:58:38,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:38,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:58:38,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:58:38,125 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 5 states. [2020-10-27 01:58:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:38,253 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2020-10-27 01:58:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:58:38,254 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-27 01:58:38,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:38,255 INFO L225 Difference]: With dead ends: 69 [2020-10-27 01:58:38,256 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 01:58:38,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:58:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 01:58:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2020-10-27 01:58:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:58:38,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-27 01:58:38,267 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2020-10-27 01:58:38,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:38,268 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-27 01:58:38,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:58:38,268 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-27 01:58:38,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:58:38,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:38,269 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:38,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:58:38,270 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:38,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:38,271 INFO L82 PathProgramCache]: Analyzing trace with hash 726160326, now seen corresponding path program 2 times [2020-10-27 01:58:38,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:38,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758213597] [2020-10-27 01:58:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:38,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:38,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:38,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:38,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:58:38,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:58:38,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-27 01:58:38,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:38,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:58:38,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:38,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:58:38,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:58:38,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:38,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:38,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:38,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:38,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:38,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:38,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:38,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:58:38,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758213597] [2020-10-27 01:58:38,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:38,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:58:38,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045018525] [2020-10-27 01:58:38,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:58:38,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:38,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:58:38,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:58:38,865 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2020-10-27 01:58:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:39,039 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2020-10-27 01:58:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:58:39,039 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-10-27 01:58:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:39,041 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:58:39,041 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:58:39,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:58:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:58:39,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2020-10-27 01:58:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:58:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-27 01:58:39,051 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 34 [2020-10-27 01:58:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:39,052 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-27 01:58:39,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:58:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-27 01:58:39,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:58:39,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:39,053 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:39,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:58:39,054 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:39,055 INFO L82 PathProgramCache]: Analyzing trace with hash -486268026, now seen corresponding path program 3 times [2020-10-27 01:58:39,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:39,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787786659] [2020-10-27 01:58:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:39,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:39,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:39,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:39,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:58:39,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:58:39,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-10-27 01:58:39,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:39,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:58:39,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:39,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:58:39,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:39,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:39,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:39,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:39,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:39,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:39,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:58:39,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:39,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:39,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:39,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:39,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:58:39,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787786659] [2020-10-27 01:58:39,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:39,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:58:39,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290254064] [2020-10-27 01:58:39,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:58:39,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:39,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:58:39,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:58:39,789 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2020-10-27 01:58:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:39,967 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2020-10-27 01:58:39,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:58:39,969 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-27 01:58:39,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:39,970 INFO L225 Difference]: With dead ends: 89 [2020-10-27 01:58:39,970 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:58:39,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:58:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:58:39,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2020-10-27 01:58:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:58:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-27 01:58:39,980 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 38 [2020-10-27 01:58:39,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:39,980 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-27 01:58:39,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:58:39,980 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-27 01:58:39,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:58:39,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:39,982 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:39,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:58:39,982 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:39,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:39,983 INFO L82 PathProgramCache]: Analyzing trace with hash 687522374, now seen corresponding path program 4 times [2020-10-27 01:58:39,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:39,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465195213] [2020-10-27 01:58:39,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:40,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:41,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:41,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:58:41,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:58:41,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1294 [2020-10-27 01:58:41,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:41,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:58:41,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:41,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:58:41,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:41,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:41,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:41,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:41,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:41,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:41,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:41,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:41,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:41,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:41,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:41,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:58:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 01:58:41,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465195213] [2020-10-27 01:58:41,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:41,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:58:41,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096891457] [2020-10-27 01:58:41,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:58:41,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:41,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:58:41,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:58:41,416 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 8 states. [2020-10-27 01:58:41,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:41,632 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2020-10-27 01:58:41,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:58:41,633 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-10-27 01:58:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:41,635 INFO L225 Difference]: With dead ends: 97 [2020-10-27 01:58:41,635 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 01:58:41,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:58:41,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 01:58:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-27 01:58:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:58:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-27 01:58:41,657 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 42 [2020-10-27 01:58:41,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:41,658 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-27 01:58:41,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:58:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-27 01:58:41,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:58:41,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:41,665 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:41,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:58:41,666 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:41,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:41,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1304227846, now seen corresponding path program 5 times [2020-10-27 01:58:41,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:41,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040017251] [2020-10-27 01:58:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:58:41,705 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:58:41,705 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:58:41,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:58:41,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:58:41 BoogieIcfgContainer [2020-10-27 01:58:41,738 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:58:41,741 INFO L168 Benchmark]: Toolchain (without parser) took 6547.35 ms. Allocated memory was 159.4 MB in the beginning and 233.8 MB in the end (delta: 74.4 MB). Free memory was 135.5 MB in the beginning and 108.6 MB in the end (delta: 26.8 MB). Peak memory consumption was 102.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:41,742 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 159.4 MB. Free memory is still 131.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:58:41,743 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.79 ms. Allocated memory is still 159.4 MB. Free memory was 134.9 MB in the beginning and 124.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:41,744 INFO L168 Benchmark]: Boogie Preprocessor took 48.63 ms. Allocated memory is still 159.4 MB. Free memory was 124.7 MB in the beginning and 122.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:41,745 INFO L168 Benchmark]: RCFGBuilder took 511.26 ms. Allocated memory is still 159.4 MB. Free memory was 122.7 MB in the beginning and 141.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:41,746 INFO L168 Benchmark]: TraceAbstraction took 5658.03 ms. Allocated memory was 159.4 MB in the beginning and 233.8 MB in the end (delta: 74.4 MB). Free memory was 141.3 MB in the beginning and 108.6 MB in the end (delta: 32.6 MB). Peak memory consumption was 107.6 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:41,750 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 159.4 MB. Free memory is still 131.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 315.79 ms. Allocated memory is still 159.4 MB. Free memory was 134.9 MB in the beginning and 124.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.63 ms. Allocated memory is still 159.4 MB. Free memory was 124.7 MB in the beginning and 122.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 511.26 ms. Allocated memory is still 159.4 MB. Free memory was 122.7 MB in the beginning and 141.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5658.03 ms. Allocated memory was 159.4 MB in the beginning and 233.8 MB in the end (delta: 74.4 MB). Free memory was 141.3 MB in the beginning and 108.6 MB in the end (delta: 32.6 MB). Peak memory consumption was 107.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 69. Possible FailurePath: [L31] char string_A[5], string_B[5]; [L32] int i, j, nc_A, nc_B, found=0; [L35] i=0 [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND FALSE !(i<5) [L37] EXPR string_A[5 -1] [L37] COND FALSE !(!(string_A[5 -1]=='\0')) [L39] i=0 [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND FALSE !(i<5) [L41] EXPR string_B[5 -1] [L41] COND FALSE !(!(string_B[5 -1]=='\0')) [L43] nc_A = 0 [L44] EXPR string_A[nc_A] [L44] COND FALSE !(string_A[nc_A]!='\0') [L47] nc_B = 0 [L48] EXPR string_B[nc_B] [L48] COND FALSE !(string_B[nc_B]!='\0') [L51] COND FALSE !(!(nc_B >= nc_A)) [L54] EXPR j=0 [L54] i=j=0 [L55] COND FALSE !((inc_B-1)<