/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/float-benchs/drift_tenth.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:02:45,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:02:45,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:02:45,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:02:45,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:02:45,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:02:45,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:02:45,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:02:45,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:02:45,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:02:45,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:02:45,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:02:45,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:02:45,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:02:45,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:02:45,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:02:45,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:02:45,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:02:45,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:02:45,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:02:45,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:02:45,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:02:45,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:02:45,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:02:45,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:02:45,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:02:45,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:02:45,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:02:45,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:02:45,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:02:45,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:02:45,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:02:45,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:02:45,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:02:45,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:02:45,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:02:45,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:02:45,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:02:45,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:02:45,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:02:45,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:02:45,796 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 [2020-10-29 09:02:45,824 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:02:45,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:02:45,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:02:45,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:02:45,827 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:02:45,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:02:45,827 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:02:45,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:02:45,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:02:45,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:02:45,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:02:45,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:02:45,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:02:45,829 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:02:45,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:02:45,830 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:02:45,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:02:45,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:02:45,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:02:45,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:02:45,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:02:45,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:02:45,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:02:45,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:02:45,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:02:45,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:02:45,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:02:45,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:02:45,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:02:45,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:02:46,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:02:46,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:02:46,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:02:46,266 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:02:46,267 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:02:46,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/drift_tenth.c.p+cfa-reducer.c [2020-10-29 09:02:46,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/930fa9e48/92f86a1d0f9c46bc9dcace1093031a1d/FLAGae06ae8c8 [2020-10-29 09:02:46,988 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:02:46,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/drift_tenth.c.p+cfa-reducer.c [2020-10-29 09:02:46,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/930fa9e48/92f86a1d0f9c46bc9dcace1093031a1d/FLAGae06ae8c8 [2020-10-29 09:02:47,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/930fa9e48/92f86a1d0f9c46bc9dcace1093031a1d [2020-10-29 09:02:47,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:02:47,411 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:02:47,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:02:47,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:02:47,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:02:47,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:02:47" (1/1) ... [2020-10-29 09:02:47,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ddc5220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:02:47, skipping insertion in model container [2020-10-29 09:02:47,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:02:47" (1/1) ... [2020-10-29 09:02:47,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:02:47,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:02:47,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:02:47,708 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:02:47,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:02:47,745 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:02:47,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:02:47 WrapperNode [2020-10-29 09:02:47,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:02:47,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:02:47,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:02:47,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:02:47,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:02:47" (1/1) ... [2020-10-29 09:02:47,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:02:47" (1/1) ... [2020-10-29 09:02:47,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:02:47" (1/1) ... [2020-10-29 09:02:47,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:02:47" (1/1) ... [2020-10-29 09:02:47,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:02:47" (1/1) ... [2020-10-29 09:02:47,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:02:47" (1/1) ... [2020-10-29 09:02:47,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:02:47" (1/1) ... [2020-10-29 09:02:47,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:02:47,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:02:47,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:02:47,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:02:47,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:02:47" (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 [2020-10-29 09:02:47,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:02:47,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:02:47,863 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:02:47,864 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:02:47,864 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:02:47,864 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:02:47,864 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:02:47,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:02:47,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:02:47,865 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:02:47,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:02:47,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:02:47,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:02:47,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:02:47,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:02:47,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:02:48,272 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:02:48,272 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 09:02:48,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:02:48 BoogieIcfgContainer [2020-10-29 09:02:48,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:02:48,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:02:48,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:02:48,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:02:48,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:02:47" (1/3) ... [2020-10-29 09:02:48,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428bd4f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:02:48, skipping insertion in model container [2020-10-29 09:02:48,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:02:47" (2/3) ... [2020-10-29 09:02:48,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428bd4f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:02:48, skipping insertion in model container [2020-10-29 09:02:48,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:02:48" (3/3) ... [2020-10-29 09:02:48,295 INFO L111 eAbstractionObserver]: Analyzing ICFG drift_tenth.c.p+cfa-reducer.c [2020-10-29 09:02:48,316 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:02:48,327 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:02:48,341 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:02:48,382 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:02:48,383 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:02:48,383 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:02:48,383 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:02:48,383 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:02:48,383 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:02:48,383 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:02:48,384 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:02:48,419 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-29 09:02:48,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-29 09:02:48,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:02:48,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:02:48,426 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:02:48,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:02:48,432 INFO L82 PathProgramCache]: Analyzing trace with hash -643733030, now seen corresponding path program 1 times [2020-10-29 09:02:48,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:02:48,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538745277] [2020-10-29 09:02:48,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:02:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:48,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:48,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:48,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-29 09:02:48,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:48,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-29 09:02:48,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:48,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:48,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:02:48,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:02:48,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:02:48,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 09:02:48,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:02:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:48,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:48,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:48,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:02:48,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:48,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 09:02:48,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:48,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:48,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:02:48,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:02:48,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:02:48,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:02:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:02:48,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538745277] [2020-10-29 09:02:48,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:02:48,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:02:48,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017307258] [2020-10-29 09:02:48,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:02:48,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:02:48,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:02:48,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:02:48,964 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2020-10-29 09:02:49,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:02:49,139 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-29 09:02:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:02:49,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-29 09:02:49,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:02:49,149 INFO L225 Difference]: With dead ends: 27 [2020-10-29 09:02:49,149 INFO L226 Difference]: Without dead ends: 12 [2020-10-29 09:02:49,153 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 [2020-10-29 09:02:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-29 09:02:49,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-29 09:02:49,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-29 09:02:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-29 09:02:49,193 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-29 09:02:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:02:49,193 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-29 09:02:49,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:02:49,194 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-29 09:02:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-29 09:02:49,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:02:49,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:02:49,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:02:49,195 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:02:49,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:02:49,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1517168292, now seen corresponding path program 1 times [2020-10-29 09:02:49,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:02:49,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228279575] [2020-10-29 09:02:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:02:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:49,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:49,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:49,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-29 09:02:49,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:49,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-29 09:02:49,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:49,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:02:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:02:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 09:02:49,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:02:49,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:02:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:49,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:49,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:49,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:02:49,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:49,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:02:49,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:49,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:49,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:02:49,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:02:49,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:02:49,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:02:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:02:49,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228279575] [2020-10-29 09:02:49,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:02:49,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:02:49,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937938319] [2020-10-29 09:02:49,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:02:49,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:02:49,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:02:49,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:02:49,506 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2020-10-29 09:02:49,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:02:49,616 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-10-29 09:02:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:02:49,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-29 09:02:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:02:49,618 INFO L225 Difference]: With dead ends: 17 [2020-10-29 09:02:49,618 INFO L226 Difference]: Without dead ends: 13 [2020-10-29 09:02:49,619 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 [2020-10-29 09:02:49,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-29 09:02:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-29 09:02:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-29 09:02:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-29 09:02:49,626 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-29 09:02:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:02:49,627 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-29 09:02:49,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:02:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-29 09:02:49,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:02:49,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:02:49,628 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:02:49,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:02:49,629 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:02:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:02:49,630 INFO L82 PathProgramCache]: Analyzing trace with hash -214367462, now seen corresponding path program 2 times [2020-10-29 09:02:49,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:02:49,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690513770] [2020-10-29 09:02:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:02:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:49,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:49,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:49,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-29 09:02:49,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:49,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-29 09:02:49,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:49,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:49,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:02:49,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:02:49,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:02:49,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:02:49,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:02:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:49,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:49,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:49,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:02:49,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:49,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:02:49,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:49,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:49,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:02:49,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:02:49,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:02:49,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:02:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:02:49,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690513770] [2020-10-29 09:02:49,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:02:49,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:02:49,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529509301] [2020-10-29 09:02:49,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:02:49,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:02:49,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:02:49,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:02:49,882 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-10-29 09:02:50,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:02:50,022 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-29 09:02:50,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:02:50,023 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-29 09:02:50,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:02:50,024 INFO L225 Difference]: With dead ends: 18 [2020-10-29 09:02:50,024 INFO L226 Difference]: Without dead ends: 14 [2020-10-29 09:02:50,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:02:50,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-29 09:02:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-29 09:02:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-29 09:02:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-29 09:02:50,031 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-29 09:02:50,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:02:50,031 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-29 09:02:50,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:02:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-29 09:02:50,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 09:02:50,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:02:50,032 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:02:50,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:02:50,033 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:02:50,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:02:50,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1942599012, now seen corresponding path program 3 times [2020-10-29 09:02:50,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:02:50,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368124275] [2020-10-29 09:02:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:02:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:50,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:50,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:50,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-29 09:02:50,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:50,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-29 09:02:50,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:50,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:50,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:02:50,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:02:50,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:02:50,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:02:50,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:02:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:50,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:50,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:50,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:02:50,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:50,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:02:50,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:50,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:50,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:02:50,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:02:50,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:02:50,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:02:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:02:50,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368124275] [2020-10-29 09:02:50,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:02:50,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:02:50,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608653608] [2020-10-29 09:02:50,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:02:50,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:02:50,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:02:50,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:02:50,208 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2020-10-29 09:02:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:02:50,372 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-29 09:02:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:02:50,372 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-29 09:02:50,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:02:50,373 INFO L225 Difference]: With dead ends: 19 [2020-10-29 09:02:50,373 INFO L226 Difference]: Without dead ends: 15 [2020-10-29 09:02:50,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:02:50,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-29 09:02:50,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-29 09:02:50,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-29 09:02:50,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-29 09:02:50,379 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-29 09:02:50,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:02:50,380 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-29 09:02:50,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:02:50,380 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-29 09:02:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 09:02:50,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:02:50,381 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:02:50,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:02:50,381 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:02:50,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:02:50,382 INFO L82 PathProgramCache]: Analyzing trace with hash 89082970, now seen corresponding path program 4 times [2020-10-29 09:02:50,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:02:50,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429728861] [2020-10-29 09:02:50,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:02:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:50,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:50,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:50,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:02:50,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:50,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-29 09:02:50,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:50,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:02:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:02:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:02:50,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:02:50,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:02:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:50,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:50,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:50,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:02:50,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:50,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:02:50,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:50,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:50,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:02:50,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:02:50,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:02:50,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:02:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:02:50,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429728861] [2020-10-29 09:02:50,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:02:50,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:02:50,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162513651] [2020-10-29 09:02:50,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:02:50,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:02:50,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:02:50,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:02:50,657 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-10-29 09:02:50,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:02:50,854 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-29 09:02:50,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:02:50,855 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-29 09:02:50,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:02:50,856 INFO L225 Difference]: With dead ends: 20 [2020-10-29 09:02:50,856 INFO L226 Difference]: Without dead ends: 16 [2020-10-29 09:02:50,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:02:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-29 09:02:50,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-29 09:02:50,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-29 09:02:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-29 09:02:50,862 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-29 09:02:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:02:50,862 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-29 09:02:50,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:02:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-29 09:02:50,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:02:50,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:02:50,863 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:02:50,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:02:50,863 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:02:50,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:02:50,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1535339484, now seen corresponding path program 5 times [2020-10-29 09:02:50,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:02:50,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283046751] [2020-10-29 09:02:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:02:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:50,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:50,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:50,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:02:50,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:50,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-29 09:02:50,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:50,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:50,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:02:50,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:02:50,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:02:50,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:02:51,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:02:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:51,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:51,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:51,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:02:51,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:51,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:02:51,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:51,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:51,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:02:51,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:02:51,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:02:51,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:02:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:02:51,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283046751] [2020-10-29 09:02:51,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:02:51,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:02:51,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177334261] [2020-10-29 09:02:51,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:02:51,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:02:51,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:02:51,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:02:51,046 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2020-10-29 09:02:51,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:02:51,283 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-29 09:02:51,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:02:51,283 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-29 09:02:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:02:51,284 INFO L225 Difference]: With dead ends: 21 [2020-10-29 09:02:51,284 INFO L226 Difference]: Without dead ends: 17 [2020-10-29 09:02:51,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:02:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-29 09:02:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-29 09:02:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-29 09:02:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-29 09:02:51,290 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-29 09:02:51,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:02:51,290 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-29 09:02:51,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:02:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-29 09:02:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:02:51,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:02:51,291 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:02:51,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:02:51,291 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:02:51,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:02:51,292 INFO L82 PathProgramCache]: Analyzing trace with hash -352828006, now seen corresponding path program 6 times [2020-10-29 09:02:51,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:02:51,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444844617] [2020-10-29 09:02:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:02:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:51,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:51,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:51,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:02:51,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:51,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-29 09:02:51,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:51,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:51,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:02:51,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:02:51,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:02:51,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:02:51,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:02:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:51,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:51,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:51,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:02:51,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:51,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:02:51,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:51,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:51,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:02:51,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:02:51,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:02:51,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:02:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:02:51,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444844617] [2020-10-29 09:02:51,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:02:51,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:02:51,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183412977] [2020-10-29 09:02:51,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:02:51,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:02:51,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:02:51,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:02:51,494 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2020-10-29 09:02:51,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:02:51,757 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-29 09:02:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:02:51,758 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-10-29 09:02:51,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:02:51,758 INFO L225 Difference]: With dead ends: 22 [2020-10-29 09:02:51,759 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:02:51,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:02:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:02:51,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-29 09:02:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-29 09:02:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-29 09:02:51,764 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-29 09:02:51,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:02:51,765 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-29 09:02:51,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:02:51,765 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-29 09:02:51,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:02:51,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:02:51,766 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:02:51,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:02:51,766 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:02:51,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:02:51,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1945289444, now seen corresponding path program 7 times [2020-10-29 09:02:51,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:02:51,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939494448] [2020-10-29 09:02:51,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:02:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:51,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:51,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:51,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:02:51,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:51,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-29 09:02:51,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:51,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:51,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:02:51,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:02:51,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:02:51,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:02:52,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:02:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:52,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:52,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:52,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:02:52,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:52,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:02:52,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:52,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:52,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:02:52,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:02:52,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:02:52,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:02:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:02:52,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939494448] [2020-10-29 09:02:52,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:02:52,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:02:52,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503225749] [2020-10-29 09:02:52,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:02:52,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:02:52,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:02:52,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:02:52,048 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 11 states. [2020-10-29 09:02:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:02:52,388 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-29 09:02:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:02:52,388 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-10-29 09:02:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:02:52,389 INFO L225 Difference]: With dead ends: 23 [2020-10-29 09:02:52,389 INFO L226 Difference]: Without dead ends: 19 [2020-10-29 09:02:52,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:02:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-29 09:02:52,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-29 09:02:52,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-29 09:02:52,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-29 09:02:52,397 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-29 09:02:52,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:02:52,398 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-29 09:02:52,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:02:52,398 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-29 09:02:52,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:02:52,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:02:52,399 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:02:52,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:02:52,399 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:02:52,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:02:52,399 INFO L82 PathProgramCache]: Analyzing trace with hash 172486362, now seen corresponding path program 8 times [2020-10-29 09:02:52,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:02:52,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359022986] [2020-10-29 09:02:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:02:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:52,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:52,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:52,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:02:52,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:52,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-29 09:02:52,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:52,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:52,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:02:52,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:02:52,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:02:52,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:02:52,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:02:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:52,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:52,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:52,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:02:52,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:52,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 09:02:52,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:52,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:52,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:02:52,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:02:52,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:02:52,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:02:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:02:52,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359022986] [2020-10-29 09:02:52,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:02:52,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:02:52,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981182115] [2020-10-29 09:02:52,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:02:52,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:02:52,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:02:52,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:02:52,811 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 12 states. [2020-10-29 09:02:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:02:53,270 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-29 09:02:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:02:53,271 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-10-29 09:02:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:02:53,272 INFO L225 Difference]: With dead ends: 24 [2020-10-29 09:02:53,272 INFO L226 Difference]: Without dead ends: 20 [2020-10-29 09:02:53,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:02:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-29 09:02:53,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-29 09:02:53,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-29 09:02:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-29 09:02:53,279 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-29 09:02:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:02:53,280 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-29 09:02:53,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:02:53,280 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-29 09:02:53,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:02:53,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:02:53,281 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:02:53,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:02:53,281 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:02:53,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:02:53,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1050165668, now seen corresponding path program 9 times [2020-10-29 09:02:53,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:02:53,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422544337] [2020-10-29 09:02:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:02:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:53,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:53,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:53,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:02:53,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:53,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-29 09:02:53,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:53,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:53,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:02:53,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:02:53,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:02:53,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:02:53,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:02:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:02:53,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:02:53,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:02:53,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:02:53,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:02:53,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:02:53,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:02:53,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:02:53,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:02:53,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:02:53,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:02:53,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:02:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:02:53,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422544337] [2020-10-29 09:02:53,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:02:53,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:02:53,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121263497] [2020-10-29 09:02:53,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:02:53,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:02:53,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:02:53,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:02:53,611 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 13 states. [2020-10-29 09:02:54,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:02:54,087 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-29 09:02:54,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:02:54,088 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2020-10-29 09:02:54,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:02:54,089 INFO L225 Difference]: With dead ends: 25 [2020-10-29 09:02:54,089 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 09:02:54,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:02:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 09:02:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-29 09:02:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 09:02:54,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-29 09:02:54,100 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-29 09:02:54,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:02:54,102 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-29 09:02:54,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:02:54,102 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-29 09:02:54,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:02:54,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:02:54,103 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:02:54,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:02:54,103 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:02:54,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:02:54,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1806546918, now seen corresponding path program 10 times [2020-10-29 09:02:54,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:02:54,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032421961] [2020-10-29 09:02:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:02:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 09:02:54,124 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 09:02:54,124 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 09:02:54,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:02:54,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:02:54 BoogieIcfgContainer [2020-10-29 09:02:54,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:02:54,154 INFO L168 Benchmark]: Toolchain (without parser) took 6748.09 ms. Allocated memory was 151.0 MB in the beginning and 222.3 MB in the end (delta: 71.3 MB). Free memory was 125.7 MB in the beginning and 119.4 MB in the end (delta: 6.3 MB). Peak memory consumption was 78.7 MB. Max. memory is 8.0 GB. [2020-10-29 09:02:54,155 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 122.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:02:54,156 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.54 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 115.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:02:54,159 INFO L168 Benchmark]: Boogie Preprocessor took 41.72 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:02:54,160 INFO L168 Benchmark]: RCFGBuilder took 484.05 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 102.7 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-29 09:02:54,163 INFO L168 Benchmark]: TraceAbstraction took 5876.04 ms. Allocated memory was 151.0 MB in the beginning and 222.3 MB in the end (delta: 71.3 MB). Free memory was 102.3 MB in the beginning and 119.4 MB in the end (delta: -17.1 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. [2020-10-29 09:02:54,173 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 122.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 332.54 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 115.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.72 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 484.05 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 102.7 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5876.04 ms. Allocated memory was 151.0 MB in the beginning and 222.3 MB in the end (delta: 71.3 MB). Free memory was 102.3 MB in the beginning and 119.4 MB in the end (delta: -17.1 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 24, overapproximation of someBinaryArithmeticFLOAToperation at line 16. Possible FailurePath: [L1] int __return_main; [L9] float main__tick = 0.10000000149011612; [L10] float main__time = 0.0; [L11] int main__i; [L12] main__i = 0 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND FALSE !(main__i < 10) [L23] int __tmp_1; [L24] __tmp_1 = main__time != 1.0 [L25] int __VERIFIER_assert__cond; [L26] __VERIFIER_assert__cond = __tmp_1 [L27] COND TRUE __VERIFIER_assert__cond == 0 [L29] CALL reach_error() [L4] __assert_fail("0", "drift_tenth.c.p+cfa-reducer.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.7s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 93 SDtfs, 52 SDslu, 248 SDs, 0 SdLazy, 269 SolverSat, 86 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 165 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 135 ConstructedInterpolants, 0 QuantifiedInterpolants, 8010 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 0/165 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...