/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/bitvector/interleave_bits.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:35:29,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:35:29,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:35:30,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:35:30,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:35:30,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:35:30,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:35:30,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:35:30,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:35:30,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:35:30,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:35:30,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:35:30,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:35:30,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:35:30,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:35:30,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:35:30,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:35:30,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:35:30,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:35:30,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:35:30,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:35:30,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:35:30,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:35:30,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:35:30,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:35:30,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:35:30,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:35:30,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:35:30,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:35:30,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:35:30,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:35:30,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:35:30,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:35:30,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:35:30,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:35:30,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:35:30,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:35:30,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:35:30,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:35:30,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:35:30,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:35:30,131 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 09:35:30,192 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:35:30,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:35:30,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:35:30,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:35:30,199 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:35:30,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:35:30,200 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:35:30,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:35:30,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:35:30,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:35:30,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:35:30,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:35:30,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:35:30,203 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:35:30,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:35:30,203 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:35:30,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:35:30,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:35:30,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:35:30,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:35:30,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:35:30,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:35:30,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:35:30,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:35:30,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:35:30,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:35:30,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:35:30,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:35:30,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:35:30,207 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:35:30,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:35:30,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:35:30,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:35:30,681 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:35:30,682 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:35:30,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/interleave_bits.i [2020-10-28 09:35:30,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3417ffb8/cdca3273ba8546168c5c38bd66e4e8d4/FLAGc75caca62 [2020-10-28 09:35:31,446 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:35:31,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/interleave_bits.i [2020-10-28 09:35:31,454 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3417ffb8/cdca3273ba8546168c5c38bd66e4e8d4/FLAGc75caca62 [2020-10-28 09:35:31,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3417ffb8/cdca3273ba8546168c5c38bd66e4e8d4 [2020-10-28 09:35:31,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:35:31,782 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:35:31,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:35:31,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:35:31,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:35:31,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:35:31" (1/1) ... [2020-10-28 09:35:31,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7614267d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:31, skipping insertion in model container [2020-10-28 09:35:31,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:35:31" (1/1) ... [2020-10-28 09:35:31,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:35:31,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:35:32,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:35:32,016 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:35:32,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:35:32,065 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:35:32,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:32 WrapperNode [2020-10-28 09:35:32,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:35:32,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:35:32,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:35:32,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:35:32,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:32" (1/1) ... [2020-10-28 09:35:32,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:32" (1/1) ... [2020-10-28 09:35:32,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:32" (1/1) ... [2020-10-28 09:35:32,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:32" (1/1) ... [2020-10-28 09:35:32,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:32" (1/1) ... [2020-10-28 09:35:32,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:32" (1/1) ... [2020-10-28 09:35:32,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:32" (1/1) ... [2020-10-28 09:35:32,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:35:32,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:35:32,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:35:32,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:35:32,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:32" (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 09:35:32,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:35:32,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:35:32,243 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:35:32,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:35:32,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:35:32,244 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:35:32,244 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:35:32,244 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:35:32,245 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:35:32,245 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:35:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:35:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2020-10-28 09:35:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:35:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:35:32,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:35:32,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:35:32,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:35:32,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:35:32,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:35:32,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:35:32,752 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:35:32,754 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 09:35:32,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:35:32 BoogieIcfgContainer [2020-10-28 09:35:32,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:35:32,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:35:32,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:35:32,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:35:32,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:35:31" (1/3) ... [2020-10-28 09:35:32,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7527f2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:35:32, skipping insertion in model container [2020-10-28 09:35:32,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:32" (2/3) ... [2020-10-28 09:35:32,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7527f2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:35:32, skipping insertion in model container [2020-10-28 09:35:32,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:35:32" (3/3) ... [2020-10-28 09:35:32,769 INFO L111 eAbstractionObserver]: Analyzing ICFG interleave_bits.i [2020-10-28 09:35:32,793 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:35:32,799 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:35:32,816 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:35:32,858 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:35:32,858 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:35:32,858 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:35:32,858 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:35:32,859 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:35:32,859 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:35:32,859 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:35:32,859 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:35:32,885 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-28 09:35:32,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 09:35:32,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:32,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:32,896 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:32,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:32,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1830502951, now seen corresponding path program 1 times [2020-10-28 09:35:32,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:32,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338004915] [2020-10-28 09:35:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:33,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:33,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:33,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 09:35:33,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:33,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-28 09:35:33,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:33,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:33,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:35:33,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:33,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:35:33,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:35:33,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:33,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:33,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:33,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:33,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:33,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 09:35:33,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:33,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:33,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:33,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:33,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:33,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:33,497 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 09:35:33,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338004915] [2020-10-28 09:35:33,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:35:33,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:35:33,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918843680] [2020-10-28 09:35:33,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:35:33,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:33,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:35:33,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:35:33,536 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2020-10-28 09:35:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:33,731 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-28 09:35:33,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:35:33,734 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-28 09:35:33,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:33,745 INFO L225 Difference]: With dead ends: 39 [2020-10-28 09:35:33,746 INFO L226 Difference]: Without dead ends: 16 [2020-10-28 09:35:33,751 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 09:35:33,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-28 09:35:33,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-28 09:35:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 09:35:33,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-28 09:35:33,797 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-28 09:35:33,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:33,798 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-28 09:35:33,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:35:33,798 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-28 09:35:33,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 09:35:33,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:33,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:33,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:35:33,800 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:33,801 INFO L82 PathProgramCache]: Analyzing trace with hash 353221151, now seen corresponding path program 1 times [2020-10-28 09:35:33,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:33,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248989770] [2020-10-28 09:35:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:33,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:33,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:33,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 09:35:33,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:33,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-28 09:35:33,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:33,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:33,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:35:33,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:33,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 09:35:33,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:34,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:34,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:34,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:34,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:34,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:34,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:35:34,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:34,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:34,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:34,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:34,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:34,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:34,090 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 09:35:34,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248989770] [2020-10-28 09:35:34,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:34,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:35:34,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453901663] [2020-10-28 09:35:34,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:35:34,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:34,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:35:34,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:35:34,094 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-10-28 09:35:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:34,224 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-28 09:35:34,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:35:34,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-28 09:35:34,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:34,226 INFO L225 Difference]: With dead ends: 25 [2020-10-28 09:35:34,226 INFO L226 Difference]: Without dead ends: 17 [2020-10-28 09:35:34,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:35:34,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-28 09:35:34,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-28 09:35:34,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 09:35:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-28 09:35:34,236 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-28 09:35:34,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:34,237 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-28 09:35:34,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:35:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-28 09:35:34,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 09:35:34,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:34,238 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:34,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:35:34,239 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:34,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:34,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1802125607, now seen corresponding path program 2 times [2020-10-28 09:35:34,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:34,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469904368] [2020-10-28 09:35:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:34,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:34,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:34,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 09:35:34,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:34,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-28 09:35:34,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:34,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:34,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:35:34,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:34,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:35:34,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:34,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:34,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:34,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:34,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:34,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:34,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:35:34,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:34,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:34,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:34,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:34,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:34,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:34,532 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 09:35:34,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469904368] [2020-10-28 09:35:34,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:34,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:35:34,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096483535] [2020-10-28 09:35:34,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:35:34,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:34,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:35:34,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:35:34,535 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-28 09:35:34,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:34,705 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-28 09:35:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:35:34,706 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-28 09:35:34,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:34,707 INFO L225 Difference]: With dead ends: 26 [2020-10-28 09:35:34,707 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 09:35:34,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:35:34,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 09:35:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-28 09:35:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 09:35:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-28 09:35:34,715 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-28 09:35:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:34,716 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-28 09:35:34,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:35:34,716 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-28 09:35:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:35:34,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:34,717 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:34,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:35:34,717 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:34,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:34,718 INFO L82 PathProgramCache]: Analyzing trace with hash -526476513, now seen corresponding path program 3 times [2020-10-28 09:35:34,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:34,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042304202] [2020-10-28 09:35:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:34,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:34,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:34,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:35:34,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:34,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-28 09:35:34,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:34,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:34,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:35:34,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:34,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:35:34,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:34,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:34,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:34,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:34,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:34,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:34,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:35:34,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:34,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:34,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:34,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:34,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:34,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:34,949 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 09:35:34,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042304202] [2020-10-28 09:35:34,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:34,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:35:34,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270896961] [2020-10-28 09:35:34,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:35:34,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:34,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:35:34,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:35:34,952 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2020-10-28 09:35:35,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:35,171 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-28 09:35:35,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:35:35,172 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-28 09:35:35,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:35,173 INFO L225 Difference]: With dead ends: 27 [2020-10-28 09:35:35,173 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 09:35:35,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:35:35,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 09:35:35,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 09:35:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 09:35:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-28 09:35:35,180 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-28 09:35:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:35,181 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-28 09:35:35,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:35:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-28 09:35:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 09:35:35,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:35,182 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:35,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:35:35,182 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:35,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:35,183 INFO L82 PathProgramCache]: Analyzing trace with hash 301301799, now seen corresponding path program 4 times [2020-10-28 09:35:35,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:35,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134429360] [2020-10-28 09:35:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:35,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:35,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:35,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 09:35:35,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:35,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-28 09:35:35,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:35,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:35,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:35:35,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:35,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:35:35,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:35,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:35,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:35,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:35,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:35,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:35,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 09:35:35,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:35,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:35,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:35,593 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 09:35:35,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134429360] [2020-10-28 09:35:35,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:35,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:35:35,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730838180] [2020-10-28 09:35:35,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:35:35,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:35,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:35:35,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:35:35,603 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2020-10-28 09:35:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:35,870 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-28 09:35:35,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:35:35,871 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-28 09:35:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:35,872 INFO L225 Difference]: With dead ends: 28 [2020-10-28 09:35:35,872 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 09:35:35,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:35:35,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 09:35:35,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-28 09:35:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 09:35:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-28 09:35:35,879 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-28 09:35:35,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:35,880 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-28 09:35:35,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:35:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-28 09:35:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 09:35:35,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:35,881 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:35,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:35:35,882 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:35,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:35,882 INFO L82 PathProgramCache]: Analyzing trace with hash 192625695, now seen corresponding path program 5 times [2020-10-28 09:35:35,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:35,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59339852] [2020-10-28 09:35:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:35,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:35,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:35,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 09:35:35,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:35,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 09:35:35,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:36,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:36,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:35:36,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:36,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:35:36,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:36,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:36,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:36,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:36,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:36,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:36,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:35:36,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:36,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:36,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:36,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:36,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:36,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:36,155 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 09:35:36,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59339852] [2020-10-28 09:35:36,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:36,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:35:36,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575514698] [2020-10-28 09:35:36,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:35:36,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:36,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:35:36,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:35:36,158 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2020-10-28 09:35:36,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:36,453 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-28 09:35:36,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:35:36,454 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-28 09:35:36,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:36,455 INFO L225 Difference]: With dead ends: 29 [2020-10-28 09:35:36,455 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 09:35:36,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:35:36,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 09:35:36,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 09:35:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 09:35:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-28 09:35:36,462 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-28 09:35:36,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:36,462 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-28 09:35:36,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:35:36,462 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-28 09:35:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 09:35:36,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:36,463 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:36,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:35:36,464 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:36,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:36,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1118633767, now seen corresponding path program 6 times [2020-10-28 09:35:36,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:36,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885417397] [2020-10-28 09:35:36,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:36,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:36,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:36,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 09:35:36,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:36,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-28 09:35:36,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:36,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:35:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:35:36,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:36,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:36,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:36,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:36,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:36,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:36,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:35:36,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:36,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:36,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:36,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:36,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:36,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:36,792 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 09:35:36,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885417397] [2020-10-28 09:35:36,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:36,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:35:36,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605904166] [2020-10-28 09:35:36,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:35:36,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:36,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:35:36,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:35:36,795 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2020-10-28 09:35:37,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:37,229 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-28 09:35:37,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:35:37,229 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-28 09:35:37,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:37,230 INFO L225 Difference]: With dead ends: 30 [2020-10-28 09:35:37,230 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 09:35:37,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:35:37,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 09:35:37,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-28 09:35:37,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 09:35:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-28 09:35:37,237 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-28 09:35:37,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:37,237 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-28 09:35:37,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:35:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-28 09:35:37,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 09:35:37,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:37,238 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:37,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:35:37,239 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:37,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:37,239 INFO L82 PathProgramCache]: Analyzing trace with hash -239887073, now seen corresponding path program 7 times [2020-10-28 09:35:37,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:37,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909801990] [2020-10-28 09:35:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:37,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:37,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:37,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 09:35:37,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:37,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-28 09:35:37,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:37,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:37,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:35:37,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:37,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:35:37,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:37,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:37,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:37,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:37,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:37,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:37,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:35:37,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:37,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:37,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:37,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:37,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:37,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:37,588 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 09:35:37,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909801990] [2020-10-28 09:35:37,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:37,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:35:37,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34092072] [2020-10-28 09:35:37,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:35:37,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:37,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:35:37,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:35:37,591 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 11 states. [2020-10-28 09:35:38,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:38,051 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-28 09:35:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:35:38,052 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-28 09:35:38,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:38,053 INFO L225 Difference]: With dead ends: 31 [2020-10-28 09:35:38,053 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 09:35:38,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:35:38,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 09:35:38,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-28 09:35:38,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 09:35:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-28 09:35:38,060 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-28 09:35:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:38,060 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-28 09:35:38,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:35:38,061 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-28 09:35:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 09:35:38,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:38,061 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:38,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:35:38,062 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:38,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:38,062 INFO L82 PathProgramCache]: Analyzing trace with hash 595639847, now seen corresponding path program 8 times [2020-10-28 09:35:38,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:38,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184734922] [2020-10-28 09:35:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:38,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:38,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:38,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 09:35:38,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:38,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-28 09:35:38,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:38,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:38,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:35:38,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:38,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:35:38,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:38,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:38,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:38,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:38,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:38,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:38,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:35:38,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:38,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:38,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:38,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:38,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:38,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:38,446 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 09:35:38,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184734922] [2020-10-28 09:35:38,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:38,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:35:38,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138230099] [2020-10-28 09:35:38,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:35:38,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:38,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:35:38,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:35:38,449 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2020-10-28 09:35:38,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:38,844 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-28 09:35:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:35:38,845 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-10-28 09:35:38,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:38,846 INFO L225 Difference]: With dead ends: 32 [2020-10-28 09:35:38,846 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 09:35:38,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:35:38,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 09:35:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 09:35:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 09:35:38,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-28 09:35:38,852 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-28 09:35:38,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:38,853 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-28 09:35:38,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:35:38,853 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-28 09:35:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 09:35:38,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:38,854 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:38,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:35:38,854 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:38,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:38,855 INFO L82 PathProgramCache]: Analyzing trace with hash 727170591, now seen corresponding path program 9 times [2020-10-28 09:35:38,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:38,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015203993] [2020-10-28 09:35:38,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:38,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:39,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:39,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 09:35:39,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:39,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-28 09:35:39,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:39,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:39,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:35:39,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:39,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:35:39,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:39,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:39,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:39,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:39,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:39,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:39,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:35:39,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:39,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:39,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:39,322 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 09:35:39,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015203993] [2020-10-28 09:35:39,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:39,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:35:39,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657891284] [2020-10-28 09:35:39,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:35:39,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:39,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:35:39,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:35:39,324 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 13 states. [2020-10-28 09:35:39,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:39,863 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-28 09:35:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:35:39,863 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-10-28 09:35:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:39,865 INFO L225 Difference]: With dead ends: 33 [2020-10-28 09:35:39,865 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 09:35:39,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:35:39,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 09:35:39,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 09:35:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 09:35:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-28 09:35:39,873 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-28 09:35:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:39,873 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-28 09:35:39,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:35:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-28 09:35:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:35:39,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:39,874 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:39,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:35:39,875 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:39,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:39,875 INFO L82 PathProgramCache]: Analyzing trace with hash 509656359, now seen corresponding path program 10 times [2020-10-28 09:35:39,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:39,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313325397] [2020-10-28 09:35:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:39,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:40,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:40,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 09:35:40,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:40,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-28 09:35:40,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:40,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:40,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:35:40,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:40,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:35:40,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:40,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:40,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:40,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:40,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:40,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:40,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:35:40,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:40,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:40,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:40,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:40,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:40,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:40,372 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 09:35:40,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313325397] [2020-10-28 09:35:40,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:40,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:35:40,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283955949] [2020-10-28 09:35:40,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:35:40,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:40,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:35:40,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:35:40,374 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 14 states. [2020-10-28 09:35:40,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:40,936 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-28 09:35:40,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:35:40,937 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-28 09:35:40,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:40,938 INFO L225 Difference]: With dead ends: 34 [2020-10-28 09:35:40,938 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 09:35:40,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:35:40,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 09:35:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 09:35:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 09:35:40,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-28 09:35:40,954 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-28 09:35:40,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:40,954 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-28 09:35:40,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:35:40,955 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-28 09:35:40,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:35:40,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:40,957 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:40,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:35:40,958 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:40,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:40,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1938317537, now seen corresponding path program 11 times [2020-10-28 09:35:40,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:40,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491030082] [2020-10-28 09:35:40,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:41,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:41,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:41,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:35:41,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:41,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-28 09:35:41,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:41,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:41,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:35:41,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:41,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:35:41,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:41,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:41,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:41,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:41,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:41,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:41,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:35:41,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:41,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:41,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:41,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:41,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:41,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:41,574 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 09:35:41,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491030082] [2020-10-28 09:35:41,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:41,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:35:41,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439080603] [2020-10-28 09:35:41,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:35:41,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:41,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:35:41,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:35:41,577 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 15 states. [2020-10-28 09:35:42,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:42,295 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-28 09:35:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:35:42,296 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-10-28 09:35:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:42,297 INFO L225 Difference]: With dead ends: 35 [2020-10-28 09:35:42,297 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 09:35:42,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:35:42,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 09:35:42,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 09:35:42,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 09:35:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-28 09:35:42,305 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-28 09:35:42,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:42,305 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-28 09:35:42,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:35:42,305 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-28 09:35:42,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 09:35:42,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:42,306 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:42,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:35:42,306 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:42,307 INFO L82 PathProgramCache]: Analyzing trace with hash -516096985, now seen corresponding path program 12 times [2020-10-28 09:35:42,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:42,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517038873] [2020-10-28 09:35:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:42,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:42,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:42,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 09:35:42,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:42,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-28 09:35:42,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:42,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:42,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:35:42,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:42,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:35:42,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:42,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:42,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:42,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:42,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:42,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:42,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:35:42,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:42,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:42,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:42,946 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 09:35:42,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517038873] [2020-10-28 09:35:42,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:42,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:35:42,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595259552] [2020-10-28 09:35:42,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:35:42,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:42,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:35:42,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:35:42,950 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 16 states. [2020-10-28 09:35:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:43,689 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-28 09:35:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:35:43,690 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-10-28 09:35:43,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:43,691 INFO L225 Difference]: With dead ends: 36 [2020-10-28 09:35:43,691 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 09:35:43,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:35:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 09:35:43,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 09:35:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 09:35:43,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-28 09:35:43,699 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-28 09:35:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:43,699 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-28 09:35:43,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:35:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-28 09:35:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 09:35:43,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:43,700 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:43,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:35:43,700 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:43,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:43,701 INFO L82 PathProgramCache]: Analyzing trace with hash 623067167, now seen corresponding path program 13 times [2020-10-28 09:35:43,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:43,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008195100] [2020-10-28 09:35:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:43,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:44,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:44,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 09:35:44,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:44,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-28 09:35:44,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:44,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:44,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:35:44,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:44,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:35:44,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:44,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:44,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:44,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:44,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:44,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:44,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:35:44,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:44,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:44,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:44,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:44,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:44,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:35:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:35:44,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008195100] [2020-10-28 09:35:44,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:44,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:35:44,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262997796] [2020-10-28 09:35:44,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:35:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:44,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:35:44,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:35:44,375 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 17 states. [2020-10-28 09:35:45,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:45,250 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-28 09:35:45,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:35:45,251 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-10-28 09:35:45,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:45,252 INFO L225 Difference]: With dead ends: 37 [2020-10-28 09:35:45,252 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 09:35:45,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:35:45,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 09:35:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 09:35:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 09:35:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-28 09:35:45,261 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-28 09:35:45,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:45,261 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-28 09:35:45,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:35:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-28 09:35:45,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:35:45,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:45,263 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:45,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:35:45,263 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:45,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:45,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1577417511, now seen corresponding path program 14 times [2020-10-28 09:35:45,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:45,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913724411] [2020-10-28 09:35:45,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:45,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:45,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 09:35:45,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:45,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-28 09:35:45,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:45,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:45,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:35:45,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:45,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:35:45,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:46,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:46,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:46,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:46,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:46,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:46,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:35:46,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:46,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:46,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:46,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:46,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:46,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:35:46,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913724411] [2020-10-28 09:35:46,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:46,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:35:46,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465048499] [2020-10-28 09:35:46,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:35:46,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:46,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:35:46,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:35:46,069 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 18 states. [2020-10-28 09:35:46,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:46,991 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-28 09:35:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:35:46,992 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-10-28 09:35:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:46,993 INFO L225 Difference]: With dead ends: 38 [2020-10-28 09:35:46,993 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 09:35:46,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:35:46,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 09:35:47,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 09:35:47,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 09:35:47,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-28 09:35:47,002 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-28 09:35:47,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:47,003 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-28 09:35:47,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:35:47,003 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-28 09:35:47,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 09:35:47,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:47,004 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:47,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:35:47,004 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:47,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:47,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1097507103, now seen corresponding path program 15 times [2020-10-28 09:35:47,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:47,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592208383] [2020-10-28 09:35:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:47,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:47,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:47,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 09:35:47,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:47,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-28 09:35:47,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:47,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:47,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:35:47,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:47,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:35:47,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:47,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:47,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:47,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:47,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:47,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:47,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:35:47,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:47,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:47,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:47,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:47,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:47,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:35:47,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592208383] [2020-10-28 09:35:47,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:47,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:35:47,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64194009] [2020-10-28 09:35:47,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:35:47,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:47,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:35:47,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:35:47,715 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 19 states. [2020-10-28 09:35:48,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:48,637 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-28 09:35:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:35:48,638 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2020-10-28 09:35:48,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:48,639 INFO L225 Difference]: With dead ends: 39 [2020-10-28 09:35:48,639 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 09:35:48,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:35:48,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 09:35:48,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 09:35:48,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 09:35:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-28 09:35:48,651 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-28 09:35:48,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:48,655 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-28 09:35:48,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:35:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-28 09:35:48,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 09:35:48,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:48,656 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:48,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:35:48,656 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:48,657 INFO L82 PathProgramCache]: Analyzing trace with hash -894813657, now seen corresponding path program 16 times [2020-10-28 09:35:48,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:48,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665736719] [2020-10-28 09:35:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 09:35:48,686 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 09:35:48,687 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 09:35:48,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:35:48,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:35:48 BoogieIcfgContainer [2020-10-28 09:35:48,717 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 09:35:48,719 INFO L168 Benchmark]: Toolchain (without parser) took 16940.90 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 125.5 MB in the beginning and 195.4 MB in the end (delta: -69.9 MB). Peak memory consumption was 93.9 MB. Max. memory is 8.0 GB. [2020-10-28 09:35:48,723 INFO L168 Benchmark]: CDTParser took 0.55 ms. Allocated memory is still 151.0 MB. Free memory is still 122.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 09:35:48,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.07 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 114.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-28 09:35:48,731 INFO L168 Benchmark]: Boogie Preprocessor took 72.45 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 113.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 09:35:48,732 INFO L168 Benchmark]: RCFGBuilder took 614.96 ms. Allocated memory is still 151.0 MB. Free memory was 113.2 MB in the beginning and 100.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-28 09:35:48,732 INFO L168 Benchmark]: TraceAbstraction took 15957.45 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 100.1 MB in the beginning and 195.4 MB in the end (delta: -95.3 MB). Peak memory consumption was 68.7 MB. Max. memory is 8.0 GB. [2020-10-28 09:35:48,736 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55 ms. Allocated memory is still 151.0 MB. Free memory is still 122.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 283.07 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 114.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 72.45 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 113.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 614.96 ms. Allocated memory is still 151.0 MB. Free memory was 113.2 MB in the beginning and 100.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15957.45 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 100.1 MB in the beginning and 195.4 MB in the end (delta: -95.3 MB). Peak memory consumption was 68.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 56, overapproximation of bitwiseAnd at line 47. Possible FailurePath: [L34] unsigned short x = __VERIFIER_nondet_ushort(); [L35] unsigned short y = __VERIFIER_nondet_ushort(); [L36] unsigned int xx; [L37] unsigned int yy; [L38] unsigned int zz; [L39] unsigned int z = 0; [L40] unsigned int i = 0; [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND FALSE !(i < sizeof(x) * 8) [L45] xx = x [L46] yy = y [L47] xx = (xx | (xx << 8u)) & 16711935U [L48] xx = (xx | (xx << 4u)) & 252645135U [L49] xx = (xx | (xx << 2u)) & 858993459U [L50] xx = (xx | (xx << 1u)) & 1431655765U [L51] yy = (yy | (yy << 8u)) & 16711935U [L52] yy = (yy | (yy << 4u)) & 252645135U [L53] yy = (yy | (yy << 2u)) & 858993459U [L54] yy = (yy | (yy << 1u)) & 1431655765U [L56] zz = xx | (yy << 1U) [L58] CALL __VERIFIER_assert(z == zz) [L16] COND TRUE !(cond) [L17] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "interleave_bits.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.8s, OverallIterations: 17, TraceHistogramMax: 16, AutomataDifference: 7.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 213 SDtfs, 131 SDslu, 695 SDs, 0 SdLazy, 2185 SolverSat, 304 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 336 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=16, 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, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.0s InterpolantComputationTime, 374 NumberOfCodeBlocks, 374 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 328 ConstructedInterpolants, 0 QuantifiedInterpolants, 35016 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 0/680 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...