/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/loopv2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:08:24,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:08:24,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:08:24,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:08:24,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:08:24,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:08:24,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:08:24,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:08:24,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:08:24,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:08:24,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:08:24,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:08:24,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:08:24,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:08:24,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:08:24,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:08:24,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:08:24,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:08:24,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:08:24,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:08:24,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:08:24,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:08:24,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:08:24,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:08:24,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:08:24,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:08:24,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:08:24,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:08:24,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:08:24,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:08:24,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:08:24,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:08:24,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:08:24,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:08:24,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:08:24,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:08:24,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:08:24,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:08:24,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:08:24,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:08:24,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:08:24,886 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 15:08:24,925 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:08:24,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:08:24,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:08:24,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:08:24,928 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:08:24,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:08:24,928 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:08:24,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:08:24,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:08:24,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:08:24,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:08:24,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:08:24,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:08:24,930 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:08:24,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:08:24,930 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:08:24,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:08:24,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:08:24,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:08:24,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:08:24,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:08:24,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:08:24,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:08:24,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:08:24,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:08:24,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:08:24,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:08:24,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:08:24,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:08:24,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:08:25,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:08:25,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:08:25,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:08:25,455 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:08:25,456 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:08:25,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv2.c [2020-10-28 15:08:25,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fba9a414a/ef0b590b7f0943bcb732a04df4e86cb4/FLAG8b3c84913 [2020-10-28 15:08:26,115 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:08:26,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/loopv2.c [2020-10-28 15:08:26,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fba9a414a/ef0b590b7f0943bcb732a04df4e86cb4/FLAG8b3c84913 [2020-10-28 15:08:26,489 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fba9a414a/ef0b590b7f0943bcb732a04df4e86cb4 [2020-10-28 15:08:26,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:08:26,504 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:08:26,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:08:26,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:08:26,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:08:26,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:08:26" (1/1) ... [2020-10-28 15:08:26,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c9a4e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:26, skipping insertion in model container [2020-10-28 15:08:26,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:08:26" (1/1) ... [2020-10-28 15:08:26,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:08:26,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:08:26,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:08:26,786 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:08:26,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:08:26,822 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:08:26,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:26 WrapperNode [2020-10-28 15:08:26,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:08:26,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:08:26,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:08:26,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:08:26,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:26" (1/1) ... [2020-10-28 15:08:26,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:26" (1/1) ... [2020-10-28 15:08:26,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:26" (1/1) ... [2020-10-28 15:08:26,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:26" (1/1) ... [2020-10-28 15:08:26,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:26" (1/1) ... [2020-10-28 15:08:26,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:26" (1/1) ... [2020-10-28 15:08:26,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:26" (1/1) ... [2020-10-28 15:08:26,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:08:26,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:08:26,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:08:26,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:08:26,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:08:26,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:08:26,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:08:26,934 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:08:26,934 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:08:26,934 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:08:26,934 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:08:26,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:08:26,935 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:08:26,935 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:08:26,935 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:08:26,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:08:26,936 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:08:26,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:08:26,936 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:08:26,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:08:26,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:08:26,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:08:26,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:08:26,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:08:26,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:08:27,197 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:08:27,198 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 15:08:27,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:08:27 BoogieIcfgContainer [2020-10-28 15:08:27,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:08:27,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:08:27,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:08:27,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:08:27,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:08:26" (1/3) ... [2020-10-28 15:08:27,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b34577e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:08:27, skipping insertion in model container [2020-10-28 15:08:27,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:08:26" (2/3) ... [2020-10-28 15:08:27,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b34577e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:08:27, skipping insertion in model container [2020-10-28 15:08:27,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:08:27" (3/3) ... [2020-10-28 15:08:27,211 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv2.c [2020-10-28 15:08:27,270 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:08:27,287 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:08:27,334 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:08:27,363 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:08:27,363 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:08:27,363 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:08:27,363 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:08:27,364 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:08:27,364 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:08:27,364 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:08:27,364 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:08:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-28 15:08:27,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 15:08:27,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:27,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:27,410 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:27,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:27,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1500402365, now seen corresponding path program 1 times [2020-10-28 15:08:27,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:27,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098351702] [2020-10-28 15:08:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:27,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:27,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:28,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:28,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:08:28,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:28,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-28 15:08:28,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:28,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:28,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:08:28,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:28,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:08:28,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:08:28,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:28,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:28,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:28,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:28,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:28,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:08:28,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:28,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:28,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:28,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:28,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:28,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:28,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098351702] [2020-10-28 15:08:28,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:08:28,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:08:28,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871688377] [2020-10-28 15:08:28,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:08:28,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:28,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:08:28,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:08:28,514 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 4 states. [2020-10-28 15:08:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:28,670 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2020-10-28 15:08:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:08:28,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-28 15:08:28,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:28,680 INFO L225 Difference]: With dead ends: 44 [2020-10-28 15:08:28,680 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 15:08:28,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:08:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 15:08:28,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 15:08:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:08:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-28 15:08:28,728 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-28 15:08:28,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:28,729 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-28 15:08:28,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:08:28,729 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-28 15:08:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:08:28,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:28,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:28,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:08:28,731 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:28,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1801503478, now seen corresponding path program 1 times [2020-10-28 15:08:28,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:28,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041602960] [2020-10-28 15:08:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:28,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:28,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:28,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:28,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 15:08:28,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:28,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-28 15:08:28,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:28,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:28,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:08:28,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:08:28,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:08:28,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:29,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:29,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:29,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:29,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:29,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:29,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:08:29,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:29,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:29,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:29,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:29,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:29,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:08:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:29,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041602960] [2020-10-28 15:08:29,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:08:29,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:08:29,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764849897] [2020-10-28 15:08:29,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:08:29,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:29,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:08:29,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:08:29,065 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-28 15:08:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:29,152 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-28 15:08:29,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:08:29,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 15:08:29,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:29,153 INFO L225 Difference]: With dead ends: 26 [2020-10-28 15:08:29,153 INFO L226 Difference]: Without dead ends: 17 [2020-10-28 15:08:29,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:08:29,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-28 15:08:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-28 15:08:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 15:08:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-28 15:08:29,161 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 16 [2020-10-28 15:08:29,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:29,162 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-28 15:08:29,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:08:29,162 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-28 15:08:29,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:08:29,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:29,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:29,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:08:29,163 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:29,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:29,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1217035893, now seen corresponding path program 1 times [2020-10-28 15:08:29,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:29,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595037096] [2020-10-28 15:08:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:29,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:29,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:29,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:29,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 15:08:29,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:29,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-28 15:08:29,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:29,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:29,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:08:29,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:29,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:08:29,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:29,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:29,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:29,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:29,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:29,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:29,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:08:29,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:29,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:29,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:29,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:29,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:29,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:08:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:29,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595037096] [2020-10-28 15:08:29,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:29,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:08:29,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685773211] [2020-10-28 15:08:29,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:08:29,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:29,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:08:29,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:08:29,555 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-10-28 15:08:29,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:29,714 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-28 15:08:29,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:08:29,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-28 15:08:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:29,716 INFO L225 Difference]: With dead ends: 26 [2020-10-28 15:08:29,716 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 15:08:29,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:08:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 15:08:29,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-28 15:08:29,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 15:08:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-28 15:08:29,724 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-28 15:08:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:29,724 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-28 15:08:29,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:08:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-28 15:08:29,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:08:29,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:29,726 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:29,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:08:29,726 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:29,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:29,727 INFO L82 PathProgramCache]: Analyzing trace with hash -441724029, now seen corresponding path program 2 times [2020-10-28 15:08:29,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:29,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094580202] [2020-10-28 15:08:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:29,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:29,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:29,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:29,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:08:29,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:29,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-28 15:08:29,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:29,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:29,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:08:29,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:29,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:08:29,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:30,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:30,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:30,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:30,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:30,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:30,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:08:30,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:30,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:30,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:30,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:30,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:30,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:30,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094580202] [2020-10-28 15:08:30,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:30,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:08:30,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093798031] [2020-10-28 15:08:30,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:08:30,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:30,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:08:30,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:08:30,115 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-10-28 15:08:30,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:30,285 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-28 15:08:30,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:08:30,285 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-28 15:08:30,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:30,286 INFO L225 Difference]: With dead ends: 27 [2020-10-28 15:08:30,286 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 15:08:30,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:08:30,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 15:08:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 15:08:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:08:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-28 15:08:30,293 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-28 15:08:30,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:30,293 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-28 15:08:30,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:08:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-28 15:08:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:08:30,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:30,294 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:30,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:08:30,295 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:30,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:30,295 INFO L82 PathProgramCache]: Analyzing trace with hash -323674059, now seen corresponding path program 3 times [2020-10-28 15:08:30,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:30,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619138935] [2020-10-28 15:08:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:30,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:30,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:30,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:30,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:08:30,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:30,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-28 15:08:30,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:30,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:30,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:08:30,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:30,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:08:30,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:30,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:30,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:30,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:30,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:30,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:30,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:08:30,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:30,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:30,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:30,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:30,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:30,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:30,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619138935] [2020-10-28 15:08:30,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:30,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:08:30,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350887415] [2020-10-28 15:08:30,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:08:30,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:30,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:08:30,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:08:30,892 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-28 15:08:31,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:31,243 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-28 15:08:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:08:31,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-28 15:08:31,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:31,244 INFO L225 Difference]: With dead ends: 28 [2020-10-28 15:08:31,244 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 15:08:31,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:08:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 15:08:31,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-28 15:08:31,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 15:08:31,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-28 15:08:31,251 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-28 15:08:31,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:31,251 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-28 15:08:31,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:08:31,252 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-28 15:08:31,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:08:31,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:31,252 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:31,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:08:31,253 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:31,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:31,253 INFO L82 PathProgramCache]: Analyzing trace with hash -959092285, now seen corresponding path program 4 times [2020-10-28 15:08:31,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:31,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543180897] [2020-10-28 15:08:31,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:31,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:31,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:31,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:31,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:08:31,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:31,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-28 15:08:31,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:31,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:31,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:08:31,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:31,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:08:31,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:31,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:31,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:31,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:31,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:31,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:31,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:08:31,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:31,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:31,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:31,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:31,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:31,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:31,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543180897] [2020-10-28 15:08:31,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:31,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:08:31,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261058542] [2020-10-28 15:08:31,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:08:31,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:31,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:08:31,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:08:31,673 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2020-10-28 15:08:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:32,149 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-28 15:08:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:08:32,149 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-28 15:08:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:32,150 INFO L225 Difference]: With dead ends: 29 [2020-10-28 15:08:32,150 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:08:32,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:08:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:08:32,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 15:08:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 15:08:32,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-28 15:08:32,156 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-28 15:08:32,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:32,157 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-28 15:08:32,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:08:32,157 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-28 15:08:32,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:08:32,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:32,158 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:32,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:08:32,158 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:32,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:32,159 INFO L82 PathProgramCache]: Analyzing trace with hash 817779189, now seen corresponding path program 5 times [2020-10-28 15:08:32,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:32,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529400690] [2020-10-28 15:08:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:32,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:32,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:32,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:32,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:08:32,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:32,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-28 15:08:32,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:32,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:32,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:08:32,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:32,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:08:32,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:08:32,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:32,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:32,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:32,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:32,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:32,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:08:32,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:32,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:32,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:32,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:32,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:32,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:08:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:32,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529400690] [2020-10-28 15:08:32,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:32,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:08:32,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037038192] [2020-10-28 15:08:32,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:08:32,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:32,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:08:32,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:08:32,765 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-10-28 15:08:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:33,272 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-28 15:08:33,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:08:33,272 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-28 15:08:33,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:33,273 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:08:33,273 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 15:08:33,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:08:33,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 15:08:33,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-28 15:08:33,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 15:08:33,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-28 15:08:33,280 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-28 15:08:33,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:33,280 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-28 15:08:33,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:08:33,281 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-28 15:08:33,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:08:33,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:33,282 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:33,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:08:33,282 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:33,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:33,282 INFO L82 PathProgramCache]: Analyzing trace with hash 66220035, now seen corresponding path program 6 times [2020-10-28 15:08:33,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:33,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232106182] [2020-10-28 15:08:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:33,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:33,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:33,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:33,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:08:33,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:33,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-28 15:08:33,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:33,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:33,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:08:33,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:33,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:08:33,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:33,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:33,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:33,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:33,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:33,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:33,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:33,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:33,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:33,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:33,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:33,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:33,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:33,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232106182] [2020-10-28 15:08:33,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:33,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:08:33,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651152714] [2020-10-28 15:08:33,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:08:33,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:33,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:08:33,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:08:33,814 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2020-10-28 15:08:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:34,500 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-28 15:08:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:08:34,501 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-28 15:08:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:34,502 INFO L225 Difference]: With dead ends: 31 [2020-10-28 15:08:34,502 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 15:08:34,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:08:34,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 15:08:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-28 15:08:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 15:08:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-28 15:08:34,520 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-28 15:08:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:34,521 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-28 15:08:34,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:08:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-28 15:08:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:08:34,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:34,522 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:34,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:08:34,522 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:34,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:34,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1757277259, now seen corresponding path program 7 times [2020-10-28 15:08:34,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:34,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434523918] [2020-10-28 15:08:34,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:34,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:34,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:35,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:35,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:08:35,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:35,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-10-28 15:08:35,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:35,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:35,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:08:35,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:35,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:08:35,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:35,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:35,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:35,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:35,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:35,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:35,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:08:35,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:35,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:35,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:35,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:35,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:35,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:35,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434523918] [2020-10-28 15:08:35,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:35,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:08:35,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585373556] [2020-10-28 15:08:35,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:08:35,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:35,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:08:35,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:08:35,303 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-10-28 15:08:36,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:36,003 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-28 15:08:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:08:36,004 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-28 15:08:36,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:36,005 INFO L225 Difference]: With dead ends: 32 [2020-10-28 15:08:36,005 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 15:08:36,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:08:36,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 15:08:36,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 15:08:36,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 15:08:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-28 15:08:36,012 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-28 15:08:36,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:36,013 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-28 15:08:36,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:08:36,013 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-28 15:08:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:08:36,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:36,014 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:36,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:08:36,014 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:36,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:36,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1843848771, now seen corresponding path program 8 times [2020-10-28 15:08:36,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:36,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392261766] [2020-10-28 15:08:36,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:36,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:36,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:36,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:36,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:08:36,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:36,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-28 15:08:36,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:36,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:36,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:08:36,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:36,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:08:36,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:36,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:36,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:36,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:36,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:36,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:36,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:08:36,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:36,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:36,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:36,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:36,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:36,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:36,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392261766] [2020-10-28 15:08:36,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:36,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:08:36,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857011200] [2020-10-28 15:08:36,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:08:36,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:36,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:08:36,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:08:36,869 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2020-10-28 15:08:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:37,687 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-28 15:08:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:08:37,688 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-28 15:08:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:37,688 INFO L225 Difference]: With dead ends: 33 [2020-10-28 15:08:37,688 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 15:08:37,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:08:37,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 15:08:37,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 15:08:37,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 15:08:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-28 15:08:37,696 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-28 15:08:37,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:37,697 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-28 15:08:37,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:08:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-28 15:08:37,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:08:37,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:37,698 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:37,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:08:37,698 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:37,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:37,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1809606005, now seen corresponding path program 9 times [2020-10-28 15:08:37,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:37,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263402355] [2020-10-28 15:08:37,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:37,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:37,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:38,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:38,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:08:38,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:38,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 591 [2020-10-28 15:08:38,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:38,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:38,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:08:38,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:38,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:08:38,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:38,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:38,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:38,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:38,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:38,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:38,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:08:38,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:38,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:38,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:38,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:38,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:38,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:38,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263402355] [2020-10-28 15:08:38,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:38,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:08:38,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669866789] [2020-10-28 15:08:38,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:08:38,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:38,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:08:38,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:08:38,651 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 16 states. [2020-10-28 15:08:39,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:39,520 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-28 15:08:39,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:08:39,521 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-28 15:08:39,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:39,522 INFO L225 Difference]: With dead ends: 34 [2020-10-28 15:08:39,522 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 15:08:39,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:08:39,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 15:08:39,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 15:08:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 15:08:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-28 15:08:39,535 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-28 15:08:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:39,537 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-28 15:08:39,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:08:39,537 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-28 15:08:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:08:39,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:39,538 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:39,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:08:39,538 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:39,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:39,540 INFO L82 PathProgramCache]: Analyzing trace with hash 748080259, now seen corresponding path program 10 times [2020-10-28 15:08:39,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:39,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316878616] [2020-10-28 15:08:39,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:39,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:39,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:40,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:40,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:08:40,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:40,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 570 [2020-10-28 15:08:40,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:40,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:40,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:08:40,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:40,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:08:40,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:40,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:40,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:40,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:40,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:40,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:40,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:08:40,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:40,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:40,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:40,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:40,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:40,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:40,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316878616] [2020-10-28 15:08:40,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:40,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:08:40,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895400872] [2020-10-28 15:08:40,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:08:40,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:08:40,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:08:40,481 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 17 states. [2020-10-28 15:08:41,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:41,433 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-28 15:08:41,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:08:41,434 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-28 15:08:41,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:41,434 INFO L225 Difference]: With dead ends: 35 [2020-10-28 15:08:41,435 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:08:41,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:08:41,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:08:41,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 15:08:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 15:08:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-28 15:08:41,447 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-28 15:08:41,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:41,448 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-28 15:08:41,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:08:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-28 15:08:41,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:08:41,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:41,452 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:41,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:08:41,452 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:41,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:41,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2094446795, now seen corresponding path program 11 times [2020-10-28 15:08:41,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:41,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939328967] [2020-10-28 15:08:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:41,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:41,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:42,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:42,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:08:42,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:42,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 573 [2020-10-28 15:08:42,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:42,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:42,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:08:42,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:42,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:08:42,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:42,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:42,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:42,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:42,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:42,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:42,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:08:42,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:42,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:42,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:42,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:42,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:42,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:42,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939328967] [2020-10-28 15:08:42,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:42,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:08:42,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174900817] [2020-10-28 15:08:42,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:08:42,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:42,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:08:42,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:08:42,445 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 18 states. [2020-10-28 15:08:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:43,509 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-28 15:08:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:08:43,510 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-28 15:08:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:43,511 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:08:43,511 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 15:08:43,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:08:43,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 15:08:43,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 15:08:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 15:08:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-28 15:08:43,519 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-28 15:08:43,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:43,520 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-28 15:08:43,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:08:43,520 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-28 15:08:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:08:43,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:43,521 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:43,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:08:43,521 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:43,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash -18472253, now seen corresponding path program 12 times [2020-10-28 15:08:43,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:43,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426840618] [2020-10-28 15:08:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:43,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:43,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:44,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:44,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:08:44,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:44,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-28 15:08:44,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:44,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:44,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:08:44,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:44,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:08:44,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:08:44,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:44,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:44,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:44,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:44,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:44,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:08:44,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:44,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:44,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:44,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:44,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:44,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:44,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426840618] [2020-10-28 15:08:44,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:44,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:08:44,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237442865] [2020-10-28 15:08:44,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:08:44,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:44,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:08:44,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:08:44,530 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 19 states. [2020-10-28 15:08:45,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:45,648 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-28 15:08:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:08:45,651 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-28 15:08:45,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:45,652 INFO L225 Difference]: With dead ends: 37 [2020-10-28 15:08:45,652 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 15:08:45,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:08:45,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 15:08:45,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 15:08:45,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 15:08:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-28 15:08:45,667 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-28 15:08:45,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:45,670 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-28 15:08:45,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:08:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-28 15:08:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:08:45,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:45,671 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:45,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:08:45,672 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:45,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:45,675 INFO L82 PathProgramCache]: Analyzing trace with hash -87770891, now seen corresponding path program 13 times [2020-10-28 15:08:45,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:45,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250751930] [2020-10-28 15:08:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:45,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:45,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:46,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:46,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:08:46,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:46,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 858 [2020-10-28 15:08:46,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:46,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:46,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:08:46,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:46,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:08:46,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:47,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:47,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:47,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:47,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:47,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:47,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:08:47,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:47,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:47,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:47,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:47,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:47,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:47,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250751930] [2020-10-28 15:08:47,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:47,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:08:47,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754310151] [2020-10-28 15:08:47,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:08:47,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:47,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:08:47,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:08:47,037 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 20 states. [2020-10-28 15:08:48,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:48,069 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-28 15:08:48,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:08:48,069 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-28 15:08:48,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:48,070 INFO L225 Difference]: With dead ends: 29 [2020-10-28 15:08:48,070 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 15:08:48,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:08:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 15:08:48,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 15:08:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 15:08:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 15:08:48,072 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-10-28 15:08:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:48,073 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 15:08:48,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:08:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 15:08:48,073 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 15:08:48,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:08:48,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 15:08:48,836 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-28 15:08:49,386 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 72 [2020-10-28 15:08:49,932 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2020-10-28 15:08:49,938 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2020-10-28 15:08:49,938 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 5) the Hoare annotation is: true [2020-10-28 15:08:49,939 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2020-10-28 15:08:49,939 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-28 15:08:49,939 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:08:49,940 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= ~SIZE~0 |old(~SIZE~0)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-28 15:08:49,941 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:08:49,941 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:08:49,941 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 15:08:49,941 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 15:08:49,941 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:08:49,941 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 7 9) no Hoare annotation was computed. [2020-10-28 15:08:49,941 INFO L274 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-28 15:08:49,941 INFO L274 CegarLoopResult]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2020-10-28 15:08:49,941 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2020-10-28 15:08:49,941 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 17 34) no Hoare annotation was computed. [2020-10-28 15:08:49,941 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 17 34) no Hoare annotation was computed. [2020-10-28 15:08:49,942 INFO L274 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-10-28 15:08:49,942 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 17 34) the Hoare annotation is: true [2020-10-28 15:08:49,942 INFO L270 CegarLoopResult]: At program point L28-2(lines 28 31) the Hoare annotation is: (let ((.cse2 (div main_~k~0 2))) (let ((.cse0 (= main_~k~0 (* .cse2 2))) (.cse1 (<= main_~k~0 (* 2 .cse2)))) (or (and .cse0 (<= main_~i~0 24) (<= 24 main_~i~0)) (and (<= 28 main_~i~0) .cse0 (<= main_~i~0 28)) (and (<= 0 (+ (* 2 (div (+ (* main_~i~0 (- 1)) (- 20)) 2)) main_~i~0 20)) (<= 52 main_~i~0) (<= 52 main_~k~0) .cse1) (and (<= 48 main_~i~0) (<= 48 main_~k~0) (<= main_~i~0 48) .cse1) (and (<= 20 main_~i~0) (<= main_~i~0 20) .cse1 (<= 20 main_~k~0)) (<= main_~j~0 (* 2 (div main_~j~0 2))) (and (<= 40 main_~i~0) (<= 40 main_~k~0) (<= main_~i~0 40) .cse1) (and (<= 16 main_~k~0) (<= main_~i~0 16) (<= 16 main_~i~0) .cse1) (and (<= main_~i~0 32) (<= 32 main_~k~0) .cse1 (<= 32 main_~i~0)) (and (<= 36 main_~i~0) (<= main_~i~0 36) (<= 36 main_~k~0) .cse1) (and (<= 44 main_~i~0) (< 21 .cse2) (<= main_~i~0 44) .cse1) (and (<= 12 main_~i~0) (<= 12 main_~k~0) (<= main_~i~0 12) .cse1)))) [2020-10-28 15:08:49,943 INFO L270 CegarLoopResult]: At program point L28-3(lines 28 31) the Hoare annotation is: (let ((.cse2 (div main_~k~0 2))) (let ((.cse0 (= main_~k~0 (* .cse2 2))) (.cse1 (<= main_~k~0 (* 2 .cse2)))) (or (and .cse0 (<= main_~i~0 24) (<= 24 main_~i~0)) (and (<= 28 main_~i~0) .cse0 (<= main_~i~0 28)) (and (<= 0 (+ (* 2 (div (+ (* main_~i~0 (- 1)) (- 20)) 2)) main_~i~0 20)) (<= 52 main_~i~0) (<= 52 main_~k~0) .cse1) (and (<= 48 main_~i~0) (<= 48 main_~k~0) (<= main_~i~0 48) .cse1) (and (<= 20 main_~i~0) (<= main_~i~0 20) .cse1 (<= 20 main_~k~0)) (and (<= 40 main_~i~0) (<= 40 main_~k~0) (<= main_~i~0 40) .cse1) (and (<= main_~i~0 32) (<= 32 main_~k~0) .cse1 (<= 32 main_~i~0)) (and (<= 16 main_~k~0) (<= main_~i~0 16) (<= 16 main_~i~0) .cse1) (and (<= 36 main_~i~0) (<= main_~i~0 36) (<= 36 main_~k~0) .cse1) (and (<= 44 main_~i~0) (< 21 .cse2) (<= main_~i~0 44) .cse1) (and (<= 12 main_~i~0) (<= 12 main_~k~0) (<= main_~i~0 12) .cse1)))) [2020-10-28 15:08:49,943 INFO L274 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-10-28 15:08:49,943 INFO L270 CegarLoopResult]: At program point L22-2(lines 22 26) the Hoare annotation is: (let ((.cse1 (div main_~j~0 2))) (let ((.cse0 (<= main_~j~0 (* 2 .cse1)))) (or (and (<= main_~i~0 32) (<= 32 main_~i~0)) (and (<= 0 (+ (* 2 (div (+ (* main_~i~0 (- 1)) (- 20)) 2)) main_~i~0 20)) (<= 52 main_~i~0)) (and (<= 40 main_~i~0) (<= main_~i~0 40)) (and (<= main_~i~0 16) (<= 16 main_~i~0)) (and (<= main_~i~0 4) .cse0 (<= 4 main_~i~0) (< 2 .cse1)) (and (<= 36 main_~i~0) (<= main_~i~0 36)) (and (<= 12 main_~i~0) (<= main_~i~0 12)) (and (<= 28 main_~i~0) (<= main_~i~0 28)) (and (<= 20 main_~i~0) (<= main_~i~0 20)) (and (<= main_~i~0 8) (< 4 .cse1) (<= 8 main_~i~0) .cse0) (and (<= 48 main_~i~0) (<= main_~i~0 48)) (and (<= main_~i~0 24) (<= 24 main_~i~0)) (and (<= 0 main_~j~0) (= main_~i~0 0) .cse0) (and (<= 44 main_~i~0) (<= main_~i~0 44))))) [2020-10-28 15:08:49,943 INFO L274 CegarLoopResult]: For program point L22-3(lines 22 26) no Hoare annotation was computed. [2020-10-28 15:08:49,944 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 10 15) the Hoare annotation is: true [2020-10-28 15:08:49,944 INFO L270 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-28 15:08:49,944 INFO L274 CegarLoopResult]: For program point L11(lines 11 13) no Hoare annotation was computed. [2020-10-28 15:08:49,944 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-28 15:08:49,944 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 10 15) no Hoare annotation was computed. [2020-10-28 15:08:49,944 INFO L274 CegarLoopResult]: For program point L11-2(lines 10 15) no Hoare annotation was computed. [2020-10-28 15:08:49,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 03:08:49 BoogieIcfgContainer [2020-10-28 15:08:49,985 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 15:08:49,987 INFO L168 Benchmark]: Toolchain (without parser) took 23489.08 ms. Allocated memory was 170.9 MB in the beginning and 357.6 MB in the end (delta: 186.6 MB). Free memory was 146.6 MB in the beginning and 232.1 MB in the end (delta: -85.5 MB). Peak memory consumption was 207.2 MB. Max. memory is 8.0 GB. [2020-10-28 15:08:49,987 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 125.8 MB. Free memory is still 100.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 15:08:49,988 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.58 ms. Allocated memory is still 170.9 MB. Free memory was 146.0 MB in the beginning and 136.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 15:08:49,989 INFO L168 Benchmark]: Boogie Preprocessor took 34.58 ms. Allocated memory is still 170.9 MB. Free memory was 136.6 MB in the beginning and 135.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 15:08:49,989 INFO L168 Benchmark]: RCFGBuilder took 340.83 ms. Allocated memory is still 170.9 MB. Free memory was 135.1 MB in the beginning and 121.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-28 15:08:49,990 INFO L168 Benchmark]: TraceAbstraction took 22782.95 ms. Allocated memory was 170.9 MB in the beginning and 357.6 MB in the end (delta: 186.6 MB). Free memory was 120.8 MB in the beginning and 232.1 MB in the end (delta: -111.2 MB). Peak memory consumption was 181.0 MB. Max. memory is 8.0 GB. [2020-10-28 15:08:49,993 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 125.8 MB. Free memory is still 100.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 316.58 ms. Allocated memory is still 170.9 MB. Free memory was 146.0 MB in the beginning and 136.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.58 ms. Allocated memory is still 170.9 MB. Free memory was 136.6 MB in the beginning and 135.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 340.83 ms. Allocated memory is still 170.9 MB. Free memory was 135.1 MB in the beginning and 121.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 22782.95 ms. Allocated memory was 170.9 MB in the beginning and 357.6 MB in the end (delta: 186.6 MB). Free memory was 120.8 MB in the beginning and 232.1 MB in the end (delta: -111.2 MB). Peak memory consumption was 181.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((((((((((i <= 32 && 32 <= i) || (0 <= 2 * ((i * -1 + -20) / 2) + i + 20 && 52 <= i)) || (40 <= i && i <= 40)) || (i <= 16 && 16 <= i)) || (((i <= 4 && j <= 2 * (j / 2)) && 4 <= i) && 2 < j / 2)) || (36 <= i && i <= 36)) || (12 <= i && i <= 12)) || (28 <= i && i <= 28)) || (20 <= i && i <= 20)) || (((i <= 8 && 4 < j / 2) && 8 <= i) && j <= 2 * (j / 2))) || (48 <= i && i <= 48)) || (i <= 24 && 24 <= i)) || ((0 <= j && i == 0) && j <= 2 * (j / 2))) || (44 <= i && i <= 44) - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((((((((((((k == k / 2 * 2 && i <= 24) && 24 <= i) || ((28 <= i && k == k / 2 * 2) && i <= 28)) || (((0 <= 2 * ((i * -1 + -20) / 2) + i + 20 && 52 <= i) && 52 <= k) && k <= 2 * (k / 2))) || (((48 <= i && 48 <= k) && i <= 48) && k <= 2 * (k / 2))) || (((20 <= i && i <= 20) && k <= 2 * (k / 2)) && 20 <= k)) || j <= 2 * (j / 2)) || (((40 <= i && 40 <= k) && i <= 40) && k <= 2 * (k / 2))) || (((16 <= k && i <= 16) && 16 <= i) && k <= 2 * (k / 2))) || (((i <= 32 && 32 <= k) && k <= 2 * (k / 2)) && 32 <= i)) || (((36 <= i && i <= 36) && 36 <= k) && k <= 2 * (k / 2))) || (((44 <= i && 21 < k / 2) && i <= 44) && k <= 2 * (k / 2))) || (((12 <= i && 12 <= k) && i <= 12) && k <= 2 * (k / 2)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.7s, OverallIterations: 15, TraceHistogramMax: 13, AutomataDifference: 9.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 169 SDtfs, 253 SDslu, 789 SDs, 0 SdLazy, 2404 SolverSat, 149 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 339 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 52 PreInvPairs, 91 NumberOfFragments, 580 HoareAnnotationTreeSize, 52 FomulaSimplifications, 136 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 10 FomulaSimplificationsInter, 1470 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 302 ConstructedInterpolants, 0 QuantifiedInterpolants, 42043 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 67/456 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...