/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=BIGGEST --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 -i ../../../trunk/examples/svcomp/bitvector/interleave_bits.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:32:52,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:32:52,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:32:52,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:32:52,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:32:52,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:32:52,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:32:52,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:32:52,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:32:52,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:32:52,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:32:52,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:32:52,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:32:52,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:32:52,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:32:52,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:32:52,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:32:52,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:32:52,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:32:52,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:32:52,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:32:52,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:32:52,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:32:52,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:32:52,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:32:52,845 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:32:52,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:32:52,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:32:52,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:32:52,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:32:52,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:32:52,848 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:32:52,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:32:52,850 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:32:52,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:32:52,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:32:52,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:32:52,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:32:52,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:32:52,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:32:52,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:32:52,854 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 [2020-10-12 10:32:52,888 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:32:52,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:32:52,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:32:52,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:32:52,892 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:32:52,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:32:52,893 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:32:52,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:32:52,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:32:52,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:32:52,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:32:52,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:32:52,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:32:52,894 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:32:52,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:32:52,895 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:32:52,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:32:52,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:32:52,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:32:52,896 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:32:52,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:32:52,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:32:52,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:32:52,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:32:52,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:32:52,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:32:52,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:32:52,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:32:52,899 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:32:52,899 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:32:53,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:32:53,230 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:32:53,233 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:32:53,235 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:32:53,236 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:32:53,236 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/interleave_bits.i [2020-10-12 10:32:53,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b17e832c/8ea9b50c6bf54727b63301258bb87e4e/FLAG4f61257e5 [2020-10-12 10:32:53,694 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:32:53,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/interleave_bits.i [2020-10-12 10:32:53,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b17e832c/8ea9b50c6bf54727b63301258bb87e4e/FLAG4f61257e5 [2020-10-12 10:32:54,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b17e832c/8ea9b50c6bf54727b63301258bb87e4e [2020-10-12 10:32:54,123 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:32:54,124 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:32:54,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:32:54,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:32:54,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:32:54,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:32:54" (1/1) ... [2020-10-12 10:32:54,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27005f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:54, skipping insertion in model container [2020-10-12 10:32:54,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:32:54" (1/1) ... [2020-10-12 10:32:54,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:32:54,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:32:54,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:32:54,389 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:32:54,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:32:54,513 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:32:54,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:54 WrapperNode [2020-10-12 10:32:54,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:32:54,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:32:54,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:32:54,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:32:54,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:54" (1/1) ... [2020-10-12 10:32:54,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:54" (1/1) ... [2020-10-12 10:32:54,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:54" (1/1) ... [2020-10-12 10:32:54,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:54" (1/1) ... [2020-10-12 10:32:54,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:54" (1/1) ... [2020-10-12 10:32:54,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:54" (1/1) ... [2020-10-12 10:32:54,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:54" (1/1) ... [2020-10-12 10:32:54,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:32:54,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:32:54,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:32:54,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:32:54,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:54" (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 [2020-10-12 10:32:54,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:32:54,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:32:54,632 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:32:54,632 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:32:54,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:32:54,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2020-10-12 10:32:54,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:32:54,634 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-12 10:32:54,634 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-12 10:32:54,634 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-12 10:32:54,635 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:32:54,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:32:54,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:32:54,813 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:32:54,814 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 10:32:54,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:32:54 BoogieIcfgContainer [2020-10-12 10:32:54,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:32:54,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:32:54,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:32:54,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:32:54,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:32:54" (1/3) ... [2020-10-12 10:32:54,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d53e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:32:54, skipping insertion in model container [2020-10-12 10:32:54,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:54" (2/3) ... [2020-10-12 10:32:54,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d53e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:32:54, skipping insertion in model container [2020-10-12 10:32:54,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:32:54" (3/3) ... [2020-10-12 10:32:54,826 INFO L109 eAbstractionObserver]: Analyzing ICFG interleave_bits.i [2020-10-12 10:32:54,841 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:32:54,848 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:32:54,862 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:32:54,885 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:32:54,885 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:32:54,885 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:32:54,885 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:32:54,885 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:32:54,885 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:32:54,886 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:32:54,886 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:32:54,904 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-12 10:32:54,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-12 10:32:54,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:54,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:54,912 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:54,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:54,918 INFO L82 PathProgramCache]: Analyzing trace with hash -480905734, now seen corresponding path program 1 times [2020-10-12 10:32:54,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:54,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507683049] [2020-10-12 10:32:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:55,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:55,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:55,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 10:32:55,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:55,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-12 10:32:55,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:32:55,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:32:55,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:32:55,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:32:55,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:55,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:55,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:55,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:55,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:55,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:32:55,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:55,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:55,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:55,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:55,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:32:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:55,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507683049] [2020-10-12 10:32:55,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:32:55,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 10:32:55,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723178017] [2020-10-12 10:32:55,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 10:32:55,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:55,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 10:32:55,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 10:32:55,270 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-10-12 10:32:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:32:55,309 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-12 10:32:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 10:32:55,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-12 10:32:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:32:55,322 INFO L225 Difference]: With dead ends: 31 [2020-10-12 10:32:55,322 INFO L226 Difference]: Without dead ends: 13 [2020-10-12 10:32:55,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 10:32:55,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-12 10:32:55,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-12 10:32:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-12 10:32:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-12 10:32:55,365 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-12 10:32:55,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:32:55,366 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-12 10:32:55,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 10:32:55,366 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-12 10:32:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-12 10:32:55,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:55,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:55,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:32:55,368 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:55,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:55,368 INFO L82 PathProgramCache]: Analyzing trace with hash -436122843, now seen corresponding path program 1 times [2020-10-12 10:32:55,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:55,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784241780] [2020-10-12 10:32:55,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:55,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:55,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:55,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 10:32:55,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:55,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-12 10:32:55,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:55,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 10:32:55,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:32:55,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 10:32:55,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:32:55,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:55,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:55,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:55,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:55,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:55,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:32:55,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:55,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:55,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:55,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:55,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:32:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:55,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784241780] [2020-10-12 10:32:55,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:32:55,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 10:32:55,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109286994] [2020-10-12 10:32:55,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 10:32:55,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:55,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 10:32:55,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:32:55,592 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-12 10:32:55,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:32:55,611 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-12 10:32:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 10:32:55,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-12 10:32:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:32:55,613 INFO L225 Difference]: With dead ends: 20 [2020-10-12 10:32:55,613 INFO L226 Difference]: Without dead ends: 14 [2020-10-12 10:32:55,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:32:55,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-12 10:32:55,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-12 10:32:55,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-12 10:32:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-12 10:32:55,620 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-12 10:32:55,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:32:55,620 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-12 10:32:55,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 10:32:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-12 10:32:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 10:32:55,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:55,622 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:55,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:32:55,622 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:55,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:55,623 INFO L82 PathProgramCache]: Analyzing trace with hash 952146778, now seen corresponding path program 2 times [2020-10-12 10:32:55,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:55,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206069771] [2020-10-12 10:32:55,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:55,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:55,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:55,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 10:32:55,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:55,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-12 10:32:55,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:55,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:32:55,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:32:55,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 10:32:55,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:55,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:55,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:55,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:55,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:55,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:55,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:32:55,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:55,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:55,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:55,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:55,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:32:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:55,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206069771] [2020-10-12 10:32:55,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:32:55,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 10:32:55,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283831736] [2020-10-12 10:32:55,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 10:32:55,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:55,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 10:32:55,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:32:55,823 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-12 10:32:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:32:55,845 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-12 10:32:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 10:32:55,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-12 10:32:55,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:32:55,847 INFO L225 Difference]: With dead ends: 21 [2020-10-12 10:32:55,847 INFO L226 Difference]: Without dead ends: 15 [2020-10-12 10:32:55,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:32:55,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-12 10:32:55,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-12 10:32:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-12 10:32:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-12 10:32:55,854 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-12 10:32:55,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:32:55,854 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-12 10:32:55,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 10:32:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-12 10:32:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 10:32:55,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:55,856 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:55,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:32:55,857 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:55,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1038832069, now seen corresponding path program 3 times [2020-10-12 10:32:55,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:55,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20579309] [2020-10-12 10:32:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:55,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:56,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:56,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 10:32:56,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:56,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-12 10:32:56,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:56,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:32:56,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:32:56,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 10:32:56,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:32:56,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:56,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:56,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:56,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:56,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:56,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:32:56,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:56,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:56,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:56,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:56,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:32:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:56,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20579309] [2020-10-12 10:32:56,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:32:56,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 10:32:56,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542482919] [2020-10-12 10:32:56,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:32:56,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:56,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:32:56,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:32:56,138 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-10-12 10:32:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:32:56,183 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-12 10:32:56,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:32:56,184 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-12 10:32:56,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:32:56,184 INFO L225 Difference]: With dead ends: 22 [2020-10-12 10:32:56,185 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 10:32:56,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:32:56,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 10:32:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-12 10:32:56,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-12 10:32:56,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-12 10:32:56,197 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-12 10:32:56,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:32:56,204 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-12 10:32:56,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:32:56,204 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-12 10:32:56,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 10:32:56,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:56,205 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:56,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:32:56,206 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:56,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:56,206 INFO L82 PathProgramCache]: Analyzing trace with hash -568891206, now seen corresponding path program 4 times [2020-10-12 10:32:56,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:56,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114186375] [2020-10-12 10:32:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:56,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:56,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:56,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 10:32:56,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:56,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-12 10:32:56,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:56,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:32:56,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:32:56,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:32:56,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:56,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:56,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:56,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:56,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:56,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:56,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:32:56,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:56,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:56,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:56,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:56,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:56,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114186375] [2020-10-12 10:32:56,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:32:56,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 10:32:56,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890594830] [2020-10-12 10:32:56,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 10:32:56,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:56,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 10:32:56,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 10:32:56,472 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-12 10:32:56,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:32:56,510 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-12 10:32:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 10:32:56,511 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-12 10:32:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:32:56,511 INFO L225 Difference]: With dead ends: 23 [2020-10-12 10:32:56,512 INFO L226 Difference]: Without dead ends: 17 [2020-10-12 10:32:56,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 10:32:56,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-12 10:32:56,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-12 10:32:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 10:32:56,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-12 10:32:56,518 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-12 10:32:56,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:32:56,518 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-12 10:32:56,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 10:32:56,518 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-12 10:32:56,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 10:32:56,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:56,519 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:56,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:32:56,520 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:56,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1131294821, now seen corresponding path program 5 times [2020-10-12 10:32:56,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:56,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469645558] [2020-10-12 10:32:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:56,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:56,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:56,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 10:32:56,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:56,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-12 10:32:56,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:56,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:32:56,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:32:56,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:32:56,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:56,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:56,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:56,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:56,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:56,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:56,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:32:56,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:56,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:56,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:56,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:56,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:56,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469645558] [2020-10-12 10:32:56,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:32:56,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:32:56,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079136148] [2020-10-12 10:32:56,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:32:56,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:56,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:32:56,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:32:56,738 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-12 10:32:56,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:32:56,779 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-12 10:32:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:32:56,779 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-12 10:32:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:32:56,780 INFO L225 Difference]: With dead ends: 24 [2020-10-12 10:32:56,780 INFO L226 Difference]: Without dead ends: 18 [2020-10-12 10:32:56,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:32:56,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-12 10:32:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-12 10:32:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-12 10:32:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-12 10:32:56,786 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-12 10:32:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:32:56,786 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-12 10:32:56,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:32:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-12 10:32:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 10:32:56,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:56,787 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:56,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:32:56,788 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:56,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:56,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1997513190, now seen corresponding path program 6 times [2020-10-12 10:32:56,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:56,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888944138] [2020-10-12 10:32:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:56,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:56,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:56,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 10:32:56,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:56,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-12 10:32:56,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:56,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:32:56,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:32:56,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 10:32:56,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:32:57,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:57,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:57,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:57,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:57,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:57,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:32:57,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:57,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:57,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:57,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:57,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:32:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:57,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888944138] [2020-10-12 10:32:57,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:32:57,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:32:57,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881436108] [2020-10-12 10:32:57,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:32:57,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:57,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:32:57,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:32:57,104 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-12 10:32:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:32:57,163 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-12 10:32:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 10:32:57,165 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-12 10:32:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:32:57,166 INFO L225 Difference]: With dead ends: 25 [2020-10-12 10:32:57,166 INFO L226 Difference]: Without dead ends: 19 [2020-10-12 10:32:57,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:32:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-12 10:32:57,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-12 10:32:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 10:32:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-12 10:32:57,176 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-12 10:32:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:32:57,176 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-12 10:32:57,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:32:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-12 10:32:57,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 10:32:57,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:57,178 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:57,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:32:57,178 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:57,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:57,179 INFO L82 PathProgramCache]: Analyzing trace with hash -206313723, now seen corresponding path program 7 times [2020-10-12 10:32:57,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:57,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171765664] [2020-10-12 10:32:57,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:57,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:57,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:57,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 10:32:57,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:57,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-12 10:32:57,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:57,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:32:57,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:32:57,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 10:32:57,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:57,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:57,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:57,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:57,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:57,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:57,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:32:57,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:57,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:57,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:57,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:57,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:57,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171765664] [2020-10-12 10:32:57,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:32:57,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:32:57,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260197616] [2020-10-12 10:32:57,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:32:57,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:57,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:32:57,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:32:57,461 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-12 10:32:57,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:32:57,527 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-12 10:32:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:32:57,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-12 10:32:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:32:57,529 INFO L225 Difference]: With dead ends: 26 [2020-10-12 10:32:57,529 INFO L226 Difference]: Without dead ends: 20 [2020-10-12 10:32:57,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:32:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-12 10:32:57,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-12 10:32:57,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 10:32:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-12 10:32:57,535 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-12 10:32:57,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:32:57,535 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-12 10:32:57,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:32:57,536 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-12 10:32:57,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 10:32:57,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:57,537 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:57,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:32:57,537 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:57,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:57,538 INFO L82 PathProgramCache]: Analyzing trace with hash -513705094, now seen corresponding path program 8 times [2020-10-12 10:32:57,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:57,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157829375] [2020-10-12 10:32:57,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:57,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:57,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:57,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 10:32:57,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:57,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-12 10:32:57,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:57,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:32:57,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:32:57,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:32:57,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:57,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:57,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:57,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:57,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:57,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:57,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:32:57,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:57,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:57,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:57,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:57,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:57,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157829375] [2020-10-12 10:32:57,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:32:57,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:32:57,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233752607] [2020-10-12 10:32:57,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:32:57,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:57,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:32:57,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:32:57,819 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2020-10-12 10:32:57,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:32:57,890 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-12 10:32:57,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:32:57,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-12 10:32:57,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:32:57,891 INFO L225 Difference]: With dead ends: 27 [2020-10-12 10:32:57,891 INFO L226 Difference]: Without dead ends: 21 [2020-10-12 10:32:57,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:32:57,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-12 10:32:57,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-12 10:32:57,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 10:32:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-12 10:32:57,897 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-12 10:32:57,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:32:57,897 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-12 10:32:57,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:32:57,897 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-12 10:32:57,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 10:32:57,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:57,898 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:57,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:32:57,899 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:57,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:57,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1452903003, now seen corresponding path program 9 times [2020-10-12 10:32:57,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:57,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897074852] [2020-10-12 10:32:57,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:57,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:58,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:58,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 10:32:58,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:58,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-12 10:32:58,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:58,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:32:58,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:32:58,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 10:32:58,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:58,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:58,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:58,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:58,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:58,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:58,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:32:58,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:58,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:58,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:58,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:58,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:58,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897074852] [2020-10-12 10:32:58,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:32:58,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:32:58,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288547169] [2020-10-12 10:32:58,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:32:58,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:58,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:32:58,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:32:58,295 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-10-12 10:32:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:32:58,374 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-12 10:32:58,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 10:32:58,375 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-12 10:32:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:32:58,376 INFO L225 Difference]: With dead ends: 28 [2020-10-12 10:32:58,376 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 10:32:58,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:32:58,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 10:32:58,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-12 10:32:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 10:32:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-12 10:32:58,381 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-12 10:32:58,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:32:58,382 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-12 10:32:58,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:32:58,382 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-12 10:32:58,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 10:32:58,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:58,383 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:58,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:32:58,383 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:58,384 INFO L82 PathProgramCache]: Analyzing trace with hash -503267110, now seen corresponding path program 10 times [2020-10-12 10:32:58,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:58,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810927845] [2020-10-12 10:32:58,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:58,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:58,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:58,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 10:32:58,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:58,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-12 10:32:58,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:32:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:32:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:32:58,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:58,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:58,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:58,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:58,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:58,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:58,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:32:58,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:58,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:58,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:58,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:58,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:58,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810927845] [2020-10-12 10:32:58,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:32:58,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:32:58,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964671945] [2020-10-12 10:32:58,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:32:58,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:58,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:32:58,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:32:58,776 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2020-10-12 10:32:58,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:32:58,877 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-12 10:32:58,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:32:58,878 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-12 10:32:58,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:32:58,879 INFO L225 Difference]: With dead ends: 29 [2020-10-12 10:32:58,879 INFO L226 Difference]: Without dead ends: 23 [2020-10-12 10:32:58,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:32:58,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-12 10:32:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-12 10:32:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 10:32:58,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-12 10:32:58,884 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-12 10:32:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:32:58,885 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-12 10:32:58,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:32:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-12 10:32:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 10:32:58,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:58,886 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:58,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:32:58,886 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:58,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:58,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1129325499, now seen corresponding path program 11 times [2020-10-12 10:32:58,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:58,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290290311] [2020-10-12 10:32:58,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:58,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:59,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:59,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 10:32:59,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:59,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-12 10:32:59,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:59,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:32:59,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:32:59,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 10:32:59,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:59,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:59,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:59,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:59,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:59,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:59,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:32:59,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:59,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:59,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:59,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:59,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:59,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290290311] [2020-10-12 10:32:59,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:32:59,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:32:59,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773652139] [2020-10-12 10:32:59,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:32:59,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:59,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:32:59,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:32:59,305 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-10-12 10:32:59,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:32:59,401 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-12 10:32:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:32:59,402 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-12 10:32:59,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:32:59,402 INFO L225 Difference]: With dead ends: 30 [2020-10-12 10:32:59,403 INFO L226 Difference]: Without dead ends: 24 [2020-10-12 10:32:59,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:32:59,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-12 10:32:59,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-12 10:32:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-12 10:32:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-12 10:32:59,408 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-12 10:32:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:32:59,408 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-12 10:32:59,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:32:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-12 10:32:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 10:32:59,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:59,409 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:59,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:32:59,410 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:59,410 INFO L82 PathProgramCache]: Analyzing trace with hash 937700922, now seen corresponding path program 12 times [2020-10-12 10:32:59,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:59,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768135573] [2020-10-12 10:32:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:59,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:59,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:59,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 10:32:59,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:59,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-12 10:32:59,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:59,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:32:59,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:32:59,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:32:59,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:59,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:59,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:59,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:59,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:59,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:59,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:32:59,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:59,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:59,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:59,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:59,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:59,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768135573] [2020-10-12 10:32:59,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:32:59,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:32:59,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726631316] [2020-10-12 10:32:59,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:32:59,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:59,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:32:59,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:32:59,951 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2020-10-12 10:33:00,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:33:00,084 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-12 10:33:00,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:33:00,084 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-12 10:33:00,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:33:00,085 INFO L225 Difference]: With dead ends: 31 [2020-10-12 10:33:00,085 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 10:33:00,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:33:00,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 10:33:00,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-12 10:33:00,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 10:33:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-12 10:33:00,090 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-12 10:33:00,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:33:00,091 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-12 10:33:00,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:33:00,091 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-12 10:33:00,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 10:33:00,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:33:00,092 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:33:00,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:33:00,092 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:33:00,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:33:00,093 INFO L82 PathProgramCache]: Analyzing trace with hash 591010533, now seen corresponding path program 13 times [2020-10-12 10:33:00,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:33:00,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740189908] [2020-10-12 10:33:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:33:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:33:00,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:33:00,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:33:00,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 10:33:00,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:33:00,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-12 10:33:00,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:33:00,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:33:00,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:33:00,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:33:00,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:33:00,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:33:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:33:00,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:33:00,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:33:00,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:33:00,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:33:00,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:33:00,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:33:00,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:33:00,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:33:00,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:33:00,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:33:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:33:00,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740189908] [2020-10-12 10:33:00,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:33:00,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:33:00,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291498134] [2020-10-12 10:33:00,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:33:00,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:33:00,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:33:00,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:33:00,648 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 16 states. [2020-10-12 10:33:00,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:33:00,783 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-12 10:33:00,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:33:00,783 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-12 10:33:00,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:33:00,784 INFO L225 Difference]: With dead ends: 32 [2020-10-12 10:33:00,784 INFO L226 Difference]: Without dead ends: 26 [2020-10-12 10:33:00,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:33:00,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-12 10:33:00,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-12 10:33:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 10:33:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-12 10:33:00,790 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-12 10:33:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:33:00,790 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-12 10:33:00,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:33:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-12 10:33:00,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 10:33:00,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:33:00,792 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:33:00,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:33:00,792 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:33:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:33:00,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1566456934, now seen corresponding path program 14 times [2020-10-12 10:33:00,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:33:00,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113290194] [2020-10-12 10:33:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:33:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:33:00,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:33:01,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:33:01,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 10:33:01,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:33:01,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-12 10:33:01,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:33:01,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:33:01,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:33:01,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:33:01,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:33:01,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:33:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:33:01,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:33:01,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:33:01,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:33:01,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:33:01,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:33:01,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:33:01,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:33:01,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:33:01,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:33:01,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:33:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:33:01,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113290194] [2020-10-12 10:33:01,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:33:01,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:33:01,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980012940] [2020-10-12 10:33:01,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:33:01,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:33:01,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:33:01,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:33:01,362 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 17 states. [2020-10-12 10:33:01,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:33:01,550 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-12 10:33:01,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:33:01,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-12 10:33:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:33:01,552 INFO L225 Difference]: With dead ends: 33 [2020-10-12 10:33:01,552 INFO L226 Difference]: Without dead ends: 27 [2020-10-12 10:33:01,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:33:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-12 10:33:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-12 10:33:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 10:33:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-12 10:33:01,557 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-12 10:33:01,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:33:01,557 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-12 10:33:01,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:33:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-12 10:33:01,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 10:33:01,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:33:01,559 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:33:01,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:33:01,559 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:33:01,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:33:01,560 INFO L82 PathProgramCache]: Analyzing trace with hash 271528325, now seen corresponding path program 15 times [2020-10-12 10:33:01,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:33:01,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723964625] [2020-10-12 10:33:01,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:33:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:33:01,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:33:01,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:33:01,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 10:33:01,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:33:01,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-12 10:33:01,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:33:01,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:33:01,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:33:01,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 10:33:01,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:33:02,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:33:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:33:02,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:33:02,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:33:02,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:33:02,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:33:02,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:33:02,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:33:02,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:33:02,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:33:02,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:33:02,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:33:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:33:02,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723964625] [2020-10-12 10:33:02,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:33:02,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:33:02,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925957718] [2020-10-12 10:33:02,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:33:02,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:33:02,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:33:02,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:33:02,171 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 18 states. [2020-10-12 10:33:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:33:02,343 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-12 10:33:02,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:33:02,345 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-12 10:33:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:33:02,345 INFO L225 Difference]: With dead ends: 34 [2020-10-12 10:33:02,345 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 10:33:02,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:33:02,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 10:33:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-12 10:33:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 10:33:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-12 10:33:02,350 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-12 10:33:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:33:02,351 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-12 10:33:02,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:33:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-12 10:33:02,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:33:02,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:33:02,352 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:33:02,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:33:02,352 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:33:02,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:33:02,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1414496506, now seen corresponding path program 16 times [2020-10-12 10:33:02,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:33:02,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438796381] [2020-10-12 10:33:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:33:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 10:33:02,364 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 10:33:02,364 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 10:33:02,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:33:02,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 10:33:02 BoogieIcfgContainer [2020-10-12 10:33:02,385 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 10:33:02,388 INFO L168 Benchmark]: Toolchain (without parser) took 8263.10 ms. Allocated memory was 138.9 MB in the beginning and 318.2 MB in the end (delta: 179.3 MB). Free memory was 101.6 MB in the beginning and 107.0 MB in the end (delta: -5.4 MB). Peak memory consumption was 173.9 MB. Max. memory is 7.1 GB. [2020-10-12 10:33:02,389 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-12 10:33:02,389 INFO L168 Benchmark]: CACSL2BoogieTranslator took 389.82 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.4 MB in the beginning and 180.9 MB in the end (delta: -79.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2020-10-12 10:33:02,390 INFO L168 Benchmark]: Boogie Preprocessor took 51.87 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 179.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-10-12 10:33:02,391 INFO L168 Benchmark]: RCFGBuilder took 250.22 ms. Allocated memory is still 201.9 MB. Free memory was 178.5 MB in the beginning and 166.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-10-12 10:33:02,391 INFO L168 Benchmark]: TraceAbstraction took 7566.40 ms. Allocated memory was 201.9 MB in the beginning and 318.2 MB in the end (delta: 116.4 MB). Free memory was 165.9 MB in the beginning and 107.0 MB in the end (delta: 58.9 MB). Peak memory consumption was 175.3 MB. Max. memory is 7.1 GB. [2020-10-12 10:33:02,395 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 389.82 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.4 MB in the beginning and 180.9 MB in the end (delta: -79.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 51.87 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 179.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 250.22 ms. Allocated memory is still 201.9 MB. Free memory was 178.5 MB in the beginning and 166.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7566.40 ms. Allocated memory was 201.9 MB in the beginning and 318.2 MB in the end (delta: 116.4 MB). Free memory was 165.9 MB in the beginning and 107.0 MB in the end (delta: 58.9 MB). Peak memory consumption was 175.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 6]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 45, overapproximation of bitwiseAnd at line 36. Possible FailurePath: [L23] unsigned short x = __VERIFIER_nondet_ushort(); [L24] unsigned short y = __VERIFIER_nondet_ushort(); [L25] unsigned int xx; [L26] unsigned int yy; [L27] unsigned int zz; [L28] unsigned int z = 0; [L29] unsigned int i = 0; [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND TRUE i < sizeof(x) * 8 [L31] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L32] i += 1U [L30] COND FALSE !(i < sizeof(x) * 8) [L34] xx = x [L35] yy = y [L36] xx = (xx | (xx << 8u)) & 16711935U [L37] xx = (xx | (xx << 4u)) & 252645135U [L38] xx = (xx | (xx << 2u)) & 858993459U [L39] xx = (xx | (xx << 1u)) & 1431655765U [L40] yy = (yy | (yy << 8u)) & 16711935U [L41] yy = (yy | (yy << 4u)) & 252645135U [L42] yy = (yy | (yy << 2u)) & 858993459U [L43] yy = (yy | (yy << 1u)) & 1431655765U [L45] zz = xx | (yy << 1U) [L47] CALL __VERIFIER_assert(z == zz) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.4s, OverallIterations: 17, TraceHistogramMax: 16, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 182 SDtfs, 0 SDslu, 798 SDs, 0 SdLazy, 1465 SolverSat, 120 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 200 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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: 0.0s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 323 NumberOfCodeBlocks, 323 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 280 ConstructedInterpolants, 0 QuantifiedInterpolants, 22680 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...