/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/loop-acceleration/underapprox_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:57:44,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:57:44,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:57:44,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:57:44,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:57:44,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:57:44,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:57:44,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:57:44,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:57:44,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:57:44,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:57:44,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:57:44,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:57:44,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:57:44,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:57:44,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:57:44,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:57:44,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:57:44,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:57:44,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:57:44,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:57:44,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:57:44,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:57:44,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:57:44,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:57:44,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:57:44,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:57:44,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:57:44,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:57:44,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:57:44,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:57:44,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:57:44,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:57:44,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:57:44,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:57:44,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:57:45,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:57:45,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:57:45,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:57:45,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:57:45,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:57:45,012 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 [2020-10-28 14:57:45,040 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:57:45,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:57:45,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:57:45,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:57:45,043 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:57:45,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:57:45,043 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:57:45,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:57:45,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:57:45,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:57:45,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:57:45,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:57:45,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:57:45,045 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:57:45,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:57:45,045 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:57:45,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:57:45,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:57:45,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:57:45,046 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:57:45,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:57:45,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:57:45,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:57:45,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:57:45,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:57:45,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:57:45,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:57:45,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:57:45,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:57:45,048 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:57:45,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:57:45,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:57:45,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:57:45,545 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:57:45,546 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:57:45,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2020-10-28 14:57:45,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cf6f15f1/e4a43a09e22b4440b6c048c01c3a8bb2/FLAG6ec8132a2 [2020-10-28 14:57:46,306 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:57:46,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2020-10-28 14:57:46,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cf6f15f1/e4a43a09e22b4440b6c048c01c3a8bb2/FLAG6ec8132a2 [2020-10-28 14:57:46,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cf6f15f1/e4a43a09e22b4440b6c048c01c3a8bb2 [2020-10-28 14:57:46,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:57:46,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:57:46,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:57:46,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:57:46,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:57:46,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:57:46" (1/1) ... [2020-10-28 14:57:46,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2251289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:46, skipping insertion in model container [2020-10-28 14:57:46,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:57:46" (1/1) ... [2020-10-28 14:57:46,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:57:46,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:57:46,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:57:46,882 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:57:46,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:57:46,916 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:57:46,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:46 WrapperNode [2020-10-28 14:57:46,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:57:46,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:57:46,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:57:46,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:57:46,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:46" (1/1) ... [2020-10-28 14:57:46,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:46" (1/1) ... [2020-10-28 14:57:46,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:46" (1/1) ... [2020-10-28 14:57:46,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:46" (1/1) ... [2020-10-28 14:57:46,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:46" (1/1) ... [2020-10-28 14:57:46,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:46" (1/1) ... [2020-10-28 14:57:46,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:46" (1/1) ... [2020-10-28 14:57:46,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:57:46,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:57:46,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:57:46,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:57:46,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:46" (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 [2020-10-28 14:57:47,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:57:47,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:57:47,037 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:57:47,037 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:57:47,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:57:47,037 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:57:47,037 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:57:47,038 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:57:47,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:57:47,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:57:47,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:57:47,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:57:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:57:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:57:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:57:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:57:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:57:47,297 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:57:47,298 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:57:47,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:57:47 BoogieIcfgContainer [2020-10-28 14:57:47,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:57:47,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:57:47,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:57:47,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:57:47,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:57:46" (1/3) ... [2020-10-28 14:57:47,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd264fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:57:47, skipping insertion in model container [2020-10-28 14:57:47,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:46" (2/3) ... [2020-10-28 14:57:47,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd264fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:57:47, skipping insertion in model container [2020-10-28 14:57:47,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:57:47" (3/3) ... [2020-10-28 14:57:47,316 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2020-10-28 14:57:47,348 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:57:47,361 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:57:47,393 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:57:47,482 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:57:47,482 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:57:47,482 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:57:47,482 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:57:47,483 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:57:47,483 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:57:47,483 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:57:47,483 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:57:47,532 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-28 14:57:47,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:57:47,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:47,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:47,543 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:47,551 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-28 14:57:47,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:47,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152651107] [2020-10-28 14:57:47,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:47,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:47,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:48,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:48,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:57:48,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:48,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-28 14:57:48,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:48,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:48,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:48,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:57:48,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:48,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 14:57:48,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:48,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:48,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:48,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:48,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:48,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:57:48,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:48,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:48,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:48,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:48,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:48,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:48,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152651107] [2020-10-28 14:57:48,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:57:48,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:57:48,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96794598] [2020-10-28 14:57:48,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:57:48,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:48,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:57:48,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:57:48,360 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-28 14:57:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:48,440 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-28 14:57:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:57:48,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:57:48,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:48,450 INFO L225 Difference]: With dead ends: 34 [2020-10-28 14:57:48,451 INFO L226 Difference]: Without dead ends: 13 [2020-10-28 14:57:48,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:57:48,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-28 14:57:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-28 14:57:48,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-28 14:57:48,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-28 14:57:48,497 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-28 14:57:48,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:48,498 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-28 14:57:48,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:57:48,498 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-28 14:57:48,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:57:48,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:48,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:48,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:57:48,499 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:48,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:48,500 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-28 14:57:48,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:48,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296120701] [2020-10-28 14:57:48,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:48,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:48,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:48,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:48,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:57:48,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:48,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-28 14:57:48,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:48,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:48,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:57:48,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:48,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:57:48,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:57:48,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:48,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:48,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:48,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:48,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:48,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:57:48,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:48,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:48,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:48,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:48,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:48,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:48,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296120701] [2020-10-28 14:57:48,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:57:48,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:57:48,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63117011] [2020-10-28 14:57:48,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:57:48,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:48,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:57:48,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:57:48,912 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-28 14:57:48,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:48,990 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-28 14:57:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:57:48,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 14:57:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:48,992 INFO L225 Difference]: With dead ends: 20 [2020-10-28 14:57:48,992 INFO L226 Difference]: Without dead ends: 14 [2020-10-28 14:57:48,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:57:48,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-28 14:57:49,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-28 14:57:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-28 14:57:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-28 14:57:49,002 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-28 14:57:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:49,002 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-28 14:57:49,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:57:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-28 14:57:49,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:57:49,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:49,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:49,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:57:49,004 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:49,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:49,005 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-28 14:57:49,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:49,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516724519] [2020-10-28 14:57:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:49,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:49,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:49,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:49,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:57:49,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:49,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-28 14:57:49,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:49,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:49,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:57:49,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:49,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:57:49,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:49,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:49,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:49,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:49,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:49,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:49,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:57:49,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:49,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:49,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:49,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:49,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:49,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:49,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516724519] [2020-10-28 14:57:49,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:49,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:57:49,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862031929] [2020-10-28 14:57:49,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:57:49,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:49,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:57:49,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:57:49,443 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-28 14:57:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:49,564 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-28 14:57:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:57:49,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-28 14:57:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:49,566 INFO L225 Difference]: With dead ends: 21 [2020-10-28 14:57:49,566 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 14:57:49,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:57:49,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 14:57:49,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 14:57:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 14:57:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-28 14:57:49,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-28 14:57:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:49,574 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-28 14:57:49,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:57:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-28 14:57:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 14:57:49,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:49,575 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:49,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:57:49,575 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:49,576 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-28 14:57:49,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:49,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688551121] [2020-10-28 14:57:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:49,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:49,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:49,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:49,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:57:49,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:49,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-28 14:57:49,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:49,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:49,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:57:49,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:49,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:57:49,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:50,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:50,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:50,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:50,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:50,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:50,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:57:50,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:50,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:50,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:50,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688551121] [2020-10-28 14:57:50,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:50,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:57:50,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059300166] [2020-10-28 14:57:50,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:57:50,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:50,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:57:50,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:57:50,153 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-10-28 14:57:50,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:50,481 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-28 14:57:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:57:50,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-28 14:57:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:50,482 INFO L225 Difference]: With dead ends: 22 [2020-10-28 14:57:50,482 INFO L226 Difference]: Without dead ends: 16 [2020-10-28 14:57:50,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:57:50,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-28 14:57:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-28 14:57:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 14:57:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-28 14:57:50,490 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-28 14:57:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:50,490 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-28 14:57:50,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:57:50,490 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-28 14:57:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:57:50,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:50,491 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:50,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:57:50,492 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:50,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:50,492 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-28 14:57:50,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:50,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288167896] [2020-10-28 14:57:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:50,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:50,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:50,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:50,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:57:50,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:50,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-28 14:57:50,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:50,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:50,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:57:50,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:50,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:57:50,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:52,933 WARN L838 $PredicateComparison]: unable to prove that (<= (+ (* 2863311531 c_main_~y~0) 2863311528) (* 4294967296 (div (+ (* c_main_~y~0 2863311531) 2863311528) 4294967296))) is different from false [2020-10-28 14:57:53,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:53,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:53,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:53,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:53,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:53,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:57:53,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:53,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:53,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2020-10-28 14:57:53,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288167896] [2020-10-28 14:57:53,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:53,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:57:53,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342460203] [2020-10-28 14:57:53,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:57:53,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:53,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:57:53,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=44, Unknown=1, NotChecked=12, Total=72 [2020-10-28 14:57:53,083 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2020-10-28 14:57:57,505 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_#t~string5.base| |c_old(#t~string5.base)|) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ (* 2863311531 c_main_~y~0) 2863311528) (* 4294967296 (div (+ (* c_main_~y~0 2863311531) 2863311528) 4294967296))) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (= |c_old(#valid)| |c_#valid|)) is different from false [2020-10-28 14:57:57,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:57,620 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-10-28 14:57:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:57:57,620 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-28 14:57:57,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:57,621 INFO L225 Difference]: With dead ends: 24 [2020-10-28 14:57:57,621 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 14:57:57,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=34, Invalid=104, Unknown=2, NotChecked=42, Total=182 [2020-10-28 14:57:57,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 14:57:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-28 14:57:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 14:57:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-28 14:57:57,629 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-28 14:57:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:57,629 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-28 14:57:57,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:57:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-28 14:57:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:57:57,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:57,631 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:57,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:57:57,631 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:57,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:57,632 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-28 14:57:57,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:57,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595633434] [2020-10-28 14:57:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:57,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:57,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:57,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:57,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:57:57,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:57,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-28 14:57:57,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:57,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:57,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:57:57,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:57,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:57:57,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:06,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:06,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:06,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:06,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:06,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:06,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:58:06,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:06,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:06,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:06,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:06,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:06,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:06,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595633434] [2020-10-28 14:58:06,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:06,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:58:06,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741503004] [2020-10-28 14:58:06,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:58:06,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:06,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:58:06,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=68, Unknown=4, NotChecked=0, Total=90 [2020-10-28 14:58:06,367 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2020-10-28 14:58:09,216 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 14:58:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:14,444 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-28 14:58:14,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:58:14,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-10-28 14:58:14,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:14,446 INFO L225 Difference]: With dead ends: 24 [2020-10-28 14:58:14,446 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 14:58:14,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=52, Invalid=214, Unknown=6, NotChecked=0, Total=272 [2020-10-28 14:58:14,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 14:58:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-28 14:58:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 14:58:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-28 14:58:14,454 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-28 14:58:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:14,454 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-28 14:58:14,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:58:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-28 14:58:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:58:14,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:14,455 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:14,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:58:14,456 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:14,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:14,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-28 14:58:14,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:14,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016993813] [2020-10-28 14:58:14,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:14,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:14,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:14,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:14,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:58:14,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:14,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-28 14:58:14,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:14,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:14,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:58:14,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:14,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:58:14,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:58:17,289 WARN L838 $PredicateComparison]: unable to prove that (<= 0 (+ (* 2147483648 (div (+ (* c_main_~y~0 (- 1431655765)) (- 715827888)) 2147483648)) (* 1431655765 c_main_~y~0) 715827888)) is different from false [2020-10-28 14:58:17,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:17,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:17,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:17,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:17,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:17,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:58:17,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:17,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:17,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:17,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:17,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:17,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2020-10-28 14:58:17,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016993813] [2020-10-28 14:58:17,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:17,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:58:17,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708771047] [2020-10-28 14:58:17,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:58:17,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:17,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:58:17,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=73, Unknown=1, NotChecked=16, Total=110 [2020-10-28 14:58:17,452 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 11 states. [2020-10-28 14:58:23,862 WARN L193 SmtUtils]: Spent 6.21 s on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 14:58:27,796 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 (+ (* 2147483648 (div (+ (* c_main_~y~0 (- 1431655765)) (- 715827888)) 2147483648)) (* 1431655765 c_main_~y~0) 715827888)) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (= |c_old(#valid)| |c_#valid|)) is different from false [2020-10-28 14:58:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:28,014 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-28 14:58:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:58:28,015 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-10-28 14:58:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:28,016 INFO L225 Difference]: With dead ends: 25 [2020-10-28 14:58:28,016 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 14:58:28,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=56, Invalid=222, Unknown=2, NotChecked=62, Total=342 [2020-10-28 14:58:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 14:58:28,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 14:58:28,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 14:58:28,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-28 14:58:28,024 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-28 14:58:28,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:28,024 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-28 14:58:28,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:58:28,024 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-28 14:58:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:58:28,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:28,025 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:28,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:58:28,025 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:28,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:28,026 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-28 14:58:28,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:28,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327414900] [2020-10-28 14:58:28,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:28,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:28,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:28,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:58:28,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:28,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-28 14:58:28,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:28,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:28,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:58:28,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:28,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:58:28,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:28,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:28,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:28,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:28,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:28,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:28,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:58:28,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:28,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:28,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:28,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:28,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:28,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:28,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327414900] [2020-10-28 14:58:28,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:28,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:58:28,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520318210] [2020-10-28 14:58:28,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:58:28,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:28,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:58:28,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:58:28,751 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 12 states. [2020-10-28 14:58:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:29,381 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-28 14:58:29,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:58:29,383 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-10-28 14:58:29,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:29,384 INFO L225 Difference]: With dead ends: 26 [2020-10-28 14:58:29,384 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 14:58:29,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:58:29,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 14:58:29,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-28 14:58:29,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 14:58:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-28 14:58:29,401 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-28 14:58:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:29,401 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-28 14:58:29,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:58:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-28 14:58:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:58:29,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:29,402 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:29,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:58:29,402 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:29,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:29,403 INFO L82 PathProgramCache]: Analyzing trace with hash 611230302, now seen corresponding path program 7 times [2020-10-28 14:58:29,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:29,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745780033] [2020-10-28 14:58:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:29,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:29,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:29,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:58:29,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:29,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-28 14:58:29,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:29,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:29,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:58:29,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:58:29,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:58:29,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:29,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:29,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:29,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:29,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:29,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:29,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:29,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:29,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:29,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:29,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745780033] [2020-10-28 14:58:29,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:29,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:58:29,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526707155] [2020-10-28 14:58:29,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:58:29,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:29,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:58:29,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:58:29,765 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2020-10-28 14:58:30,228 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-28 14:58:30,373 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-28 14:58:30,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:30,375 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-28 14:58:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:58:30,375 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-28 14:58:30,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:30,375 INFO L225 Difference]: With dead ends: 20 [2020-10-28 14:58:30,376 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 14:58:30,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:58:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 14:58:30,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 14:58:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 14:58:30,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 14:58:30,377 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-28 14:58:30,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:30,377 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 14:58:30,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:58:30,377 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 14:58:30,377 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 14:58:30,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:58:30,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 14:58:33,785 WARN L193 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 81 DAG size of output: 23 [2020-10-28 14:58:40,945 WARN L193 SmtUtils]: Spent 7.13 s on a formula simplification. DAG size of input: 240 DAG size of output: 111 [2020-10-28 14:58:40,949 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-28 14:58:40,950 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-28 14:58:40,950 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-28 14:58:40,950 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-28 14:58:40,950 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:58:40,951 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-28 14:58:40,951 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:58:40,951 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:58:40,951 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 14:58:40,951 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 14:58:40,951 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:58:40,951 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 12 22) the Hoare annotation is: true [2020-10-28 14:58:40,951 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 12 22) no Hoare annotation was computed. [2020-10-28 14:58:40,952 INFO L270 CegarLoopResult]: At program point L16-2(lines 16 19) the Hoare annotation is: (let ((.cse0 (div main_~x~0 4294967296))) (let ((.cse6 (+ main_~y~0 1)) (.cse1 (* 4294967296 .cse0)) (.cse2 (<= main_~x~0 (+ (* 4294967296 (div (+ main_~x~0 (- 2)) 4294967296)) 6)))) (or (and (< 0 (+ .cse0 1)) (<= 2 main_~y~0) (<= main_~x~0 1) (<= main_~y~0 2) (<= (+ .cse1 1) main_~x~0)) (let ((.cse5 (div main_~y~0 4294967296))) (and .cse2 (<= (let ((.cse4 (* .cse5 (- 4294967296)))) (let ((.cse3 (div (+ main_~y~0 .cse4) 3))) (+ (* 4294967295 (div (+ main_~y~0 (* .cse3 (- 3)) .cse4) 4294967296)) (* 3 .cse3) (* 4294967295 .cse5) 1))) main_~y~0) (<= .cse5 0) (<= (+ .cse1 6) main_~x~0))) (and .cse2 (<= main_~y~0 4) (<= 1 (+ main_~y~0 (* 3 (div (+ (* main_~y~0 (- 89478485)) 89478484) 268435456))))) (and .cse2 (<= main_~y~0 8) (<= main_~x~0 (+ (* 4294967296 (div (+ main_~x~0 (- 3)) 4294967296)) 7)) (<= .cse6 (* 3 (div (+ (* main_~y~0 178956971) 178956968) 536870912)))) (and .cse2 (<= .cse6 (* 3 (div (+ (* main_~y~0 715827883) 715827872) 2147483648))) (<= (+ .cse1 5) main_~x~0) (<= main_~y~0 32)) (and (<= 0 main_~x~0) (<= main_~x~0 0) (<= 1 main_~y~0) (<= main_~y~0 1)) (and .cse2 (<= main_~y~0 16) (<= 1 (+ main_~y~0 (* 3 (div (+ (* main_~y~0 (- 357913941)) 357913936) 1073741824)))) (<= main_~x~0 (+ (* 4294967296 (div (+ main_~x~0 (- 4)) 4294967296)) 8)))))) [2020-10-28 14:58:40,952 INFO L270 CegarLoopResult]: At program point L16-3(lines 16 19) the Hoare annotation is: (<= (let ((.cse2 (div main_~y~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ main_~y~0 .cse1) 3))) (+ (* 12297829379609722880 (div (+ main_~y~0 (* .cse0 (- 3)) .cse1) 4294967296)) (* 8589934592 .cse0) (* 12297829383904690176 .cse2) 1431655776)))) (* 2863311531 main_~y~0)) [2020-10-28 14:58:40,952 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 12 22) no Hoare annotation was computed. [2020-10-28 14:58:40,952 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-10-28 14:58:40,953 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-10-28 14:58:40,953 INFO L270 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (not (<= 1 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 1) 0))) [2020-10-28 14:58:40,953 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-10-28 14:58:40,953 INFO L274 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-10-28 14:58:40,953 INFO L274 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-10-28 14:58:41,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:58:41 BoogieIcfgContainer [2020-10-28 14:58:41,003 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:58:41,005 INFO L168 Benchmark]: Toolchain (without parser) took 54337.19 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 140.2 MB in the beginning and 83.0 MB in the end (delta: 57.1 MB). Peak memory consumption was 92.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:58:41,005 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 125.8 MB. Free memory is still 100.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:58:41,006 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.27 ms. Allocated memory is still 164.6 MB. Free memory was 139.5 MB in the beginning and 130.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:58:41,007 INFO L168 Benchmark]: Boogie Preprocessor took 35.35 ms. Allocated memory is still 164.6 MB. Free memory was 130.2 MB in the beginning and 128.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:58:41,008 INFO L168 Benchmark]: RCFGBuilder took 346.26 ms. Allocated memory is still 164.6 MB. Free memory was 128.8 MB in the beginning and 116.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-28 14:58:41,008 INFO L168 Benchmark]: TraceAbstraction took 53699.78 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 116.2 MB in the beginning and 83.0 MB in the end (delta: 33.2 MB). Peak memory consumption was 67.9 MB. Max. memory is 8.0 GB. [2020-10-28 14:58:41,012 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 ms. Allocated memory is still 125.8 MB. Free memory is still 100.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 243.27 ms. Allocated memory is still 164.6 MB. Free memory was 139.5 MB in the beginning and 130.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.35 ms. Allocated memory is still 164.6 MB. Free memory was 130.2 MB in the beginning and 128.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 346.26 ms. Allocated memory is still 164.6 MB. Free memory was 128.8 MB in the beginning and 116.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 53699.78 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 116.2 MB in the beginning and 83.0 MB in the end (delta: 33.2 MB). Peak memory consumption was 67.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (((((((((0 < x / 4294967296 + 1 && 2 <= y) && x <= 1) && y <= 2) && 4294967296 * (x / 4294967296) + 1 <= x) || (((x <= 4294967296 * ((x + -2) / 4294967296) + 6 && 4294967295 * ((y + (y + y / 4294967296 * -4294967296) / 3 * -3 + y / 4294967296 * -4294967296) / 4294967296) + 3 * ((y + y / 4294967296 * -4294967296) / 3) + 4294967295 * (y / 4294967296) + 1 <= y) && y / 4294967296 <= 0) && 4294967296 * (x / 4294967296) + 6 <= x)) || ((x <= 4294967296 * ((x + -2) / 4294967296) + 6 && y <= 4) && 1 <= y + 3 * ((y * -89478485 + 89478484) / 268435456))) || (((x <= 4294967296 * ((x + -2) / 4294967296) + 6 && y <= 8) && x <= 4294967296 * ((x + -3) / 4294967296) + 7) && y + 1 <= 3 * ((y * 178956971 + 178956968) / 536870912))) || (((x <= 4294967296 * ((x + -2) / 4294967296) + 6 && y + 1 <= 3 * ((y * 715827883 + 715827872) / 2147483648)) && 4294967296 * (x / 4294967296) + 5 <= x) && y <= 32)) || (((0 <= x && x <= 0) && 1 <= y) && y <= 1)) || (((x <= 4294967296 * ((x + -2) / 4294967296) + 6 && y <= 16) && 1 <= y + 3 * ((y * -357913941 + 357913936) / 1073741824)) && x <= 4294967296 * ((x + -4) / 4294967296) + 8) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 42.9s, OverallIterations: 9, TraceHistogramMax: 7, AutomataDifference: 25.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 10.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 63 SDslu, 250 SDs, 0 SdLazy, 389 SolverSat, 70 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 34.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 33 PreInvPairs, 45 NumberOfFragments, 342 HoareAnnotationTreeSize, 33 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 1172 FormulaSimplificationTreeSizeReductionInter, 10.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 17.2s InterpolantComputationTime, 136 NumberOfCodeBlocks, 136 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 127 ConstructedInterpolants, 0 QuantifiedInterpolants, 16882 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 19/84 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...