/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/float-benchs/drift_tenth.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:28:09,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:28:09,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:28:09,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:28:09,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:28:09,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:28:09,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:28:09,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:28:09,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:28:09,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:28:09,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:28:09,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:28:09,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:28:09,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:28:09,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:28:09,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:28:09,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:28:09,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:28:09,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:28:09,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:28:09,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:28:09,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:28:09,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:28:09,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:28:09,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:28:09,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:28:09,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:28:09,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:28:09,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:28:09,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:28:09,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:28:09,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:28:09,675 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:28:09,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:28:09,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:28:09,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:28:09,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:28:09,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:28:09,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:28:09,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:28:09,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:28:09,682 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 15:28:09,707 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:28:09,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:28:09,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:28:09,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:28:09,710 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:28:09,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:28:09,711 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:28:09,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:28:09,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:28:09,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:28:09,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:28:09,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:28:09,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:28:09,712 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:28:09,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:28:09,712 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:28:09,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:28:09,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:28:09,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:28:09,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:28:09,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:28:09,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:28:09,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:28:09,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:28:09,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:28:09,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:28:09,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:28:09,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:28:09,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:28:09,716 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 15:28:10,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:28:10,100 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:28:10,105 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:28:10,107 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:28:10,108 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:28:10,109 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/drift_tenth.c.p+cfa-reducer.c [2020-10-12 15:28:10,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/807f3a52c/8e4738fa0f2047ecb2563c4acc74e3e7/FLAGb1a85be15 [2020-10-12 15:28:10,698 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:28:10,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/drift_tenth.c.p+cfa-reducer.c [2020-10-12 15:28:10,706 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/807f3a52c/8e4738fa0f2047ecb2563c4acc74e3e7/FLAGb1a85be15 [2020-10-12 15:28:11,062 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/807f3a52c/8e4738fa0f2047ecb2563c4acc74e3e7 [2020-10-12 15:28:11,077 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:28:11,080 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:28:11,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:28:11,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:28:11,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:28:11,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:28:11" (1/1) ... [2020-10-12 15:28:11,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72d7fa3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:28:11, skipping insertion in model container [2020-10-12 15:28:11,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:28:11" (1/1) ... [2020-10-12 15:28:11,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:28:11,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:28:11,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:28:11,334 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:28:11,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:28:11,371 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:28:11,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:28:11 WrapperNode [2020-10-12 15:28:11,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:28:11,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:28:11,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:28:11,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:28:11,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:28:11" (1/1) ... [2020-10-12 15:28:11,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:28:11" (1/1) ... [2020-10-12 15:28:11,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:28:11" (1/1) ... [2020-10-12 15:28:11,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:28:11" (1/1) ... [2020-10-12 15:28:11,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:28:11" (1/1) ... [2020-10-12 15:28:11,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:28:11" (1/1) ... [2020-10-12 15:28:11,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:28:11" (1/1) ... [2020-10-12 15:28:11,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:28:11,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:28:11,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:28:11,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:28:11,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:28:11" (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 15:28:11,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:28:11,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:28:11,627 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:28:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:28:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 15:28:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:28:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:28:11,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:28:11,824 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:28:11,825 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 15:28:11,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:28:11 BoogieIcfgContainer [2020-10-12 15:28:11,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:28:11,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:28:11,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:28:11,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:28:11,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:28:11" (1/3) ... [2020-10-12 15:28:11,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18555883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:28:11, skipping insertion in model container [2020-10-12 15:28:11,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:28:11" (2/3) ... [2020-10-12 15:28:11,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18555883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:28:11, skipping insertion in model container [2020-10-12 15:28:11,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:28:11" (3/3) ... [2020-10-12 15:28:11,839 INFO L109 eAbstractionObserver]: Analyzing ICFG drift_tenth.c.p+cfa-reducer.c [2020-10-12 15:28:11,851 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:28:11,859 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:28:11,876 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:28:11,905 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:28:11,906 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:28:11,906 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:28:11,906 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:28:11,907 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:28:11,907 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:28:11,907 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:28:11,907 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:28:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-10-12 15:28:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-12 15:28:11,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:28:11,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:28:11,935 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:28:11,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:28:11,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1301230683, now seen corresponding path program 1 times [2020-10-12 15:28:11,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:28:11,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924497717] [2020-10-12 15:28:11,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:28:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:12,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:12,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:12,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:28:12,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:12,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-12 15:28:12,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:12,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:28:12,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:28:12,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:28:12,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:28:12,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:28:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:12,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:12,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:12,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:28:12,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:12,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:28:12,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:12,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:28:12,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:28:12,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:28:12,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:28:12,212 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 15:28:12,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924497717] [2020-10-12 15:28:12,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:28:12,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 15:28:12,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511930815] [2020-10-12 15:28:12,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 15:28:12,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:28:12,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 15:28:12,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:28:12,251 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2020-10-12 15:28:12,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:28:12,373 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-10-12 15:28:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 15:28:12,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-10-12 15:28:12,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:28:12,397 INFO L225 Difference]: With dead ends: 22 [2020-10-12 15:28:12,398 INFO L226 Difference]: Without dead ends: 11 [2020-10-12 15:28:12,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 15:28:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-10-12 15:28:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-12 15:28:12,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-12 15:28:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-10-12 15:28:12,449 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-10-12 15:28:12,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:28:12,449 INFO L479 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-10-12 15:28:12,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 15:28:12,450 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-10-12 15:28:12,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 15:28:12,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:28:12,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:28:12,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:28:12,451 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:28:12,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:28:12,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1683383028, now seen corresponding path program 1 times [2020-10-12 15:28:12,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:28:12,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365511554] [2020-10-12 15:28:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:28:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:12,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:12,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:12,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 15:28:12,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:12,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-12 15:28:12,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:12,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 15:28:12,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:28:12,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 15:28:12,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:28:12,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:28:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:12,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:12,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:12,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:28:12,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:12,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:28:12,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:12,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:28:12,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:28:12,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:28:12,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:28:12,616 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 15:28:12,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365511554] [2020-10-12 15:28:12,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:28:12,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 15:28:12,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343847788] [2020-10-12 15:28:12,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 15:28:12,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:28:12,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 15:28:12,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:28:12,622 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 5 states. [2020-10-12 15:28:12,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:28:12,683 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-10-12 15:28:12,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 15:28:12,684 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-12 15:28:12,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:28:12,685 INFO L225 Difference]: With dead ends: 15 [2020-10-12 15:28:12,685 INFO L226 Difference]: Without dead ends: 12 [2020-10-12 15:28:12,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:28:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-12 15:28:12,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-12 15:28:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-12 15:28:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-12 15:28:12,693 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-12 15:28:12,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:28:12,693 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-12 15:28:12,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 15:28:12,694 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-12 15:28:12,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-12 15:28:12,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:28:12,695 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:28:12,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:28:12,695 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:28:12,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:28:12,696 INFO L82 PathProgramCache]: Analyzing trace with hash 645203835, now seen corresponding path program 2 times [2020-10-12 15:28:12,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:28:12,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807651789] [2020-10-12 15:28:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:28:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:12,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:12,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:12,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-12 15:28:12,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:12,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-12 15:28:12,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:12,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:28:12,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:28:12,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 15:28:12,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:28:12,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:28:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:12,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:12,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:12,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:28:12,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:12,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:28:12,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:12,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:28:12,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:28:12,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:28:12,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:28:12,907 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 15:28:12,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807651789] [2020-10-12 15:28:12,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:28:12,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 15:28:12,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179578195] [2020-10-12 15:28:12,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:28:12,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:28:12,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:28:12,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:28:12,910 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-10-12 15:28:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:28:12,978 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-10-12 15:28:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:28:12,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-12 15:28:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:28:12,980 INFO L225 Difference]: With dead ends: 16 [2020-10-12 15:28:12,980 INFO L226 Difference]: Without dead ends: 13 [2020-10-12 15:28:12,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:28:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-12 15:28:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-12 15:28:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-12 15:28:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-12 15:28:12,987 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-12 15:28:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:28:12,987 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-12 15:28:12,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:28:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-12 15:28:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-12 15:28:12,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:28:12,989 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:28:12,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:28:12,989 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:28:12,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:28:12,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1473580076, now seen corresponding path program 3 times [2020-10-12 15:28:12,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:28:12,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662063698] [2020-10-12 15:28:12,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:28:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:13,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:13,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:13,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:28:13,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:13,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-12 15:28:13,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:13,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:28:13,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:28:13,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 15:28:13,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:28:13,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:28:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:13,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:13,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:13,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:28:13,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:13,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:28:13,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:13,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:28:13,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:28:13,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:28:13,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:28:13,159 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 15:28:13,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662063698] [2020-10-12 15:28:13,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:28:13,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 15:28:13,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401961325] [2020-10-12 15:28:13,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:28:13,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:28:13,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:28:13,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:28:13,163 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-10-12 15:28:13,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:28:13,268 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-10-12 15:28:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:28:13,269 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-12 15:28:13,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:28:13,270 INFO L225 Difference]: With dead ends: 17 [2020-10-12 15:28:13,270 INFO L226 Difference]: Without dead ends: 14 [2020-10-12 15:28:13,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:28:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-12 15:28:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-12 15:28:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-12 15:28:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-12 15:28:13,277 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-12 15:28:13,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:28:13,278 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-12 15:28:13,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:28:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-12 15:28:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 15:28:13,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:28:13,280 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:28:13,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:28:13,281 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:28:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:28:13,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1563595419, now seen corresponding path program 4 times [2020-10-12 15:28:13,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:28:13,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762096375] [2020-10-12 15:28:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:28:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:13,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:13,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:13,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:28:13,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:13,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-12 15:28:13,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:13,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:28:13,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:28:13,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:28:13,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:28:13,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:28:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:13,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:13,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:13,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:28:13,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:13,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:28:13,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:13,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:28:13,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:28:13,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:28:13,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:28:13,500 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 15:28:13,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762096375] [2020-10-12 15:28:13,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:28:13,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:28:13,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988358074] [2020-10-12 15:28:13,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:28:13,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:28:13,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:28:13,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:28:13,505 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2020-10-12 15:28:13,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:28:13,605 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-12 15:28:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:28:13,606 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-12 15:28:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:28:13,607 INFO L225 Difference]: With dead ends: 18 [2020-10-12 15:28:13,607 INFO L226 Difference]: Without dead ends: 15 [2020-10-12 15:28:13,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:28:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-12 15:28:13,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-12 15:28:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-12 15:28:13,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-12 15:28:13,614 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-12 15:28:13,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:28:13,615 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-12 15:28:13,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:28:13,615 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-12 15:28:13,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 15:28:13,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:28:13,616 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:28:13,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:28:13,617 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:28:13,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:28:13,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1226755252, now seen corresponding path program 5 times [2020-10-12 15:28:13,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:28:13,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410805732] [2020-10-12 15:28:13,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:28:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:13,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:13,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:13,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:28:13,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:13,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-12 15:28:13,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:13,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:28:13,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:28:13,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:28:13,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:28:13,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:28:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:13,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:13,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:13,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:28:13,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:13,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:28:13,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:13,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:28:13,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:28:13,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:28:13,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:28:13,783 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 15:28:13,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410805732] [2020-10-12 15:28:13,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:28:13,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:28:13,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138531709] [2020-10-12 15:28:13,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:28:13,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:28:13,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:28:13,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:28:13,786 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2020-10-12 15:28:13,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:28:13,907 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-12 15:28:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:28:13,908 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-12 15:28:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:28:13,909 INFO L225 Difference]: With dead ends: 19 [2020-10-12 15:28:13,909 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 15:28:13,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:28:13,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 15:28:13,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-12 15:28:13,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-12 15:28:13,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-12 15:28:13,915 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-12 15:28:13,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:28:13,915 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-12 15:28:13,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:28:13,916 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-12 15:28:13,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 15:28:13,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:28:13,917 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:28:13,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:28:13,917 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:28:13,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:28:13,918 INFO L82 PathProgramCache]: Analyzing trace with hash -625355333, now seen corresponding path program 6 times [2020-10-12 15:28:13,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:28:13,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970528846] [2020-10-12 15:28:13,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:28:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:13,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:13,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:13,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:28:13,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:13,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-12 15:28:13,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:13,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:28:13,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:28:13,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:28:13,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:28:14,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:28:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:14,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:14,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:14,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:28:14,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:14,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:28:14,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:14,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:28:14,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:28:14,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:28:14,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:28:14,078 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 15:28:14,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970528846] [2020-10-12 15:28:14,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:28:14,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:28:14,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364279949] [2020-10-12 15:28:14,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:28:14,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:28:14,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:28:14,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:28:14,081 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2020-10-12 15:28:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:28:14,197 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-12 15:28:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:28:14,197 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-10-12 15:28:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:28:14,198 INFO L225 Difference]: With dead ends: 20 [2020-10-12 15:28:14,198 INFO L226 Difference]: Without dead ends: 17 [2020-10-12 15:28:14,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:28:14,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-12 15:28:14,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-12 15:28:14,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 15:28:14,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-12 15:28:14,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-12 15:28:14,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:28:14,205 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-12 15:28:14,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:28:14,206 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-12 15:28:14,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 15:28:14,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:28:14,206 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:28:14,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:28:14,207 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:28:14,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:28:14,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2088758676, now seen corresponding path program 7 times [2020-10-12 15:28:14,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:28:14,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370086517] [2020-10-12 15:28:14,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:28:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:14,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:14,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:14,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 15:28:14,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:14,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-12 15:28:14,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:14,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:28:14,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:28:14,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 15:28:14,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:28:14,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:28:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:14,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:14,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:14,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:28:14,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:14,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:28:14,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:14,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:28:14,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:28:14,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:28:14,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:28:14,389 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 15:28:14,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370086517] [2020-10-12 15:28:14,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:28:14,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:28:14,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205037118] [2020-10-12 15:28:14,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:28:14,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:28:14,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:28:14,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:28:14,392 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 11 states. [2020-10-12 15:28:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:28:14,555 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-12 15:28:14,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:28:14,556 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-10-12 15:28:14,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:28:14,557 INFO L225 Difference]: With dead ends: 21 [2020-10-12 15:28:14,557 INFO L226 Difference]: Without dead ends: 18 [2020-10-12 15:28:14,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:28:14,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-12 15:28:14,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-12 15:28:14,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-12 15:28:14,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-12 15:28:14,563 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-12 15:28:14,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:28:14,563 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-12 15:28:14,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:28:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-12 15:28:14,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 15:28:14,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:28:14,565 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:28:14,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:28:14,565 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:28:14,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:28:14,566 INFO L82 PathProgramCache]: Analyzing trace with hash 326947035, now seen corresponding path program 8 times [2020-10-12 15:28:14,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:28:14,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207198452] [2020-10-12 15:28:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:28:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:14,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:14,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:14,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:28:14,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:14,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-12 15:28:14,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:14,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:28:14,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:28:14,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:28:14,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:28:14,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:28:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:14,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:14,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:14,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:28:14,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:14,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:28:14,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:14,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:28:14,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:28:14,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:28:14,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:28:14,741 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 15:28:14,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207198452] [2020-10-12 15:28:14,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:28:14,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:28:14,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623278233] [2020-10-12 15:28:14,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:28:14,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:28:14,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:28:14,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:28:14,744 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 12 states. [2020-10-12 15:28:14,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:28:14,908 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-12 15:28:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:28:14,909 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-10-12 15:28:14,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:28:14,910 INFO L225 Difference]: With dead ends: 22 [2020-10-12 15:28:14,910 INFO L226 Difference]: Without dead ends: 19 [2020-10-12 15:28:14,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:28:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-12 15:28:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-12 15:28:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 15:28:14,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-12 15:28:14,916 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-12 15:28:14,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:28:14,917 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-12 15:28:14,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:28:14,917 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-12 15:28:14,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 15:28:14,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:28:14,918 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:28:14,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:28:14,918 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:28:14,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:28:14,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1545361012, now seen corresponding path program 9 times [2020-10-12 15:28:14,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:28:14,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963790819] [2020-10-12 15:28:14,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:28:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:14,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:15,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:15,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:28:15,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:15,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-12 15:28:15,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:15,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:28:15,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:28:15,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:28:15,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:28:15,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:28:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:28:15,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:28:15,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:28:15,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:28:15,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:28:15,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:28:15,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:28:15,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:28:15,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:28:15,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:28:15,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:28:15,163 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 15:28:15,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963790819] [2020-10-12 15:28:15,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:28:15,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:28:15,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240021671] [2020-10-12 15:28:15,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:28:15,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:28:15,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:28:15,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:28:15,166 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 13 states. [2020-10-12 15:28:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:28:15,333 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-12 15:28:15,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:28:15,334 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2020-10-12 15:28:15,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:28:15,335 INFO L225 Difference]: With dead ends: 23 [2020-10-12 15:28:15,335 INFO L226 Difference]: Without dead ends: 20 [2020-10-12 15:28:15,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:28:15,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-12 15:28:15,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-12 15:28:15,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 15:28:15,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-12 15:28:15,340 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-12 15:28:15,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:28:15,341 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-12 15:28:15,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:28:15,341 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-12 15:28:15,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 15:28:15,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:28:15,342 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:28:15,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:28:15,342 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:28:15,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:28:15,343 INFO L82 PathProgramCache]: Analyzing trace with hash 661488635, now seen corresponding path program 10 times [2020-10-12 15:28:15,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:28:15,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554315909] [2020-10-12 15:28:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:28:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 15:28:15,352 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 15:28:15,353 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 15:28:15,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:28:15,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 03:28:15 BoogieIcfgContainer [2020-10-12 15:28:15,379 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 15:28:15,382 INFO L168 Benchmark]: Toolchain (without parser) took 4302.17 ms. Allocated memory was 136.3 MB in the beginning and 250.1 MB in the end (delta: 113.8 MB). Free memory was 100.1 MB in the beginning and 98.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 115.7 MB. Max. memory is 7.1 GB. [2020-10-12 15:28:15,383 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 136.3 MB. Free memory was 117.9 MB in the beginning and 117.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-12 15:28:15,384 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.15 ms. Allocated memory is still 136.3 MB. Free memory was 99.9 MB in the beginning and 89.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-10-12 15:28:15,385 INFO L168 Benchmark]: Boogie Preprocessor took 39.32 ms. Allocated memory is still 136.3 MB. Free memory was 89.9 MB in the beginning and 88.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-12 15:28:15,386 INFO L168 Benchmark]: RCFGBuilder took 416.07 ms. Allocated memory was 136.3 MB in the beginning and 203.4 MB in the end (delta: 67.1 MB). Free memory was 88.5 MB in the beginning and 171.6 MB in the end (delta: -83.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-10-12 15:28:15,387 INFO L168 Benchmark]: TraceAbstraction took 3549.07 ms. Allocated memory was 203.4 MB in the beginning and 250.1 MB in the end (delta: 46.7 MB). Free memory was 170.8 MB in the beginning and 98.1 MB in the end (delta: 72.7 MB). Peak memory consumption was 119.4 MB. Max. memory is 7.1 GB. [2020-10-12 15:28:15,390 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 136.3 MB. Free memory was 117.9 MB in the beginning and 117.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 289.15 ms. Allocated memory is still 136.3 MB. Free memory was 99.9 MB in the beginning and 89.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.32 ms. Allocated memory is still 136.3 MB. Free memory was 89.9 MB in the beginning and 88.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 416.07 ms. Allocated memory was 136.3 MB in the beginning and 203.4 MB in the end (delta: 67.1 MB). Free memory was 88.5 MB in the beginning and 171.6 MB in the end (delta: -83.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3549.07 ms. Allocated memory was 203.4 MB in the beginning and 250.1 MB in the end (delta: 46.7 MB). Free memory was 170.8 MB in the beginning and 98.1 MB in the end (delta: 72.7 MB). Peak memory consumption was 119.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 27]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 14. Possible FailurePath: [L1] int __return_main; [L7] float main__tick = 0.10000000149011612; [L8] float main__time = 0.0; [L9] int main__i; [L10] main__i = 0 [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 [L12] COND FALSE !(main__i < 10) [L21] int __tmp_1; [L22] __tmp_1 = main__time != 1.0 [L23] int __VERIFIER_assert__cond; [L24] __VERIFIER_assert__cond = __tmp_1 [L25] COND TRUE __VERIFIER_assert__cond == 0 [L27] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 93 SDtfs, 52 SDslu, 218 SDs, 0 SdLazy, 196 SolverSat, 77 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 154 NumberOfCodeBlocks, 154 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 125 ConstructedInterpolants, 0 QuantifiedInterpolants, 3435 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 0/165 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...