/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 SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:09:09,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:09:09,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:09:09,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:09:09,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:09:09,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:09:09,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:09:09,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:09:09,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:09:09,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:09:09,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:09:09,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:09:09,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:09:09,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:09:09,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:09:09,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:09:09,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:09:09,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:09:09,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:09:09,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:09:09,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:09:09,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:09:09,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:09:09,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:09:09,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:09:09,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:09:09,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:09:09,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:09:09,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:09:09,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:09:09,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:09:09,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:09:09,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:09:09,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:09:09,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:09:09,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:09:09,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:09:09,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:09:09,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:09:09,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:09:09,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:09:09,680 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 [2020-09-25 09:09:09,708 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:09:09,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:09:09,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:09:09,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:09:09,710 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:09:09,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:09:09,710 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:09:09,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:09:09,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:09:09,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:09:09,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:09:09,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:09:09,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:09:09,712 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:09:09,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:09:09,712 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:09:09,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:09:09,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:09:09,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:09:09,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:09:09,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:09:09,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:09:09,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:09:09,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:09:09,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:09:09,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:09:09,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:09:09,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:09:09,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:09:09,715 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 -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 09:09:10,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:09:10,265 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:09:10,270 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:09:10,272 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:09:10,272 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:09:10,273 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-25 09:09:10,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7b48de94/e8f9f415f5cb4f36aaf96c6ef62610ea/FLAGb4f00c947 [2020-09-25 09:09:10,944 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:09:10,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-25 09:09:10,955 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7b48de94/e8f9f415f5cb4f36aaf96c6ef62610ea/FLAGb4f00c947 [2020-09-25 09:09:11,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7b48de94/e8f9f415f5cb4f36aaf96c6ef62610ea [2020-09-25 09:09:11,284 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:09:11,291 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:09:11,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:09:11,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:09:11,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:09:11,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:09:11" (1/1) ... [2020-09-25 09:09:11,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15a568e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:09:11, skipping insertion in model container [2020-09-25 09:09:11,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:09:11" (1/1) ... [2020-09-25 09:09:11,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:09:11,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:09:11,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:09:11,578 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:09:11,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:09:11,619 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:09:11,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:09:11 WrapperNode [2020-09-25 09:09:11,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:09:11,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:09:11,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:09:11,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:09:11,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:09:11" (1/1) ... [2020-09-25 09:09:11,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:09:11" (1/1) ... [2020-09-25 09:09:11,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:09:11" (1/1) ... [2020-09-25 09:09:11,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:09:11" (1/1) ... [2020-09-25 09:09:11,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:09:11" (1/1) ... [2020-09-25 09:09:11,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:09:11" (1/1) ... [2020-09-25 09:09:11,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:09:11" (1/1) ... [2020-09-25 09:09:11,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:09:11,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:09:11,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:09:11,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:09:11,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:09:11" (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 [2020-09-25 09:09:11,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:09:11,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:09:11,827 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 09:09:11,827 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-25 09:09:11,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:09:11,828 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 09:09:11,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:09:11,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 09:09:11,828 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 09:09:11,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 09:09:11,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 09:09:11,829 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:09:11,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 09:09:11,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 09:09:11,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 09:09:11,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:09:11,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:09:12,122 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:09:12,122 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 09:09:12,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:09:12 BoogieIcfgContainer [2020-09-25 09:09:12,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:09:12,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:09:12,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:09:12,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:09:12,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:09:11" (1/3) ... [2020-09-25 09:09:12,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3030e216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:09:12, skipping insertion in model container [2020-09-25 09:09:12,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:09:11" (2/3) ... [2020-09-25 09:09:12,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3030e216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:09:12, skipping insertion in model container [2020-09-25 09:09:12,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:09:12" (3/3) ... [2020-09-25 09:09:12,141 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-09-25 09:09:12,155 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:09:12,167 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:09:12,194 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:09:12,231 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:09:12,231 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:09:12,231 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:09:12,232 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:09:12,232 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:09:12,232 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:09:12,232 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:09:12,232 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:09:12,260 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-25 09:09:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 09:09:12,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:09:12,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:09:12,271 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:09:12,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:09:12,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1392671971, now seen corresponding path program 1 times [2020-09-25 09:09:12,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:09:12,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024093654] [2020-09-25 09:09:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:09:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:12,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:12,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:12,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:12,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 09:09:12,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:09:12,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-09-25 09:09:12,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:12,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:12,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:09:12,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 09:09:12,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 09:09:12,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:09:12,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:09:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:12,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:12,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:12,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:09:12,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:12,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 09:09:12,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:12,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:12,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:12,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:12,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:12,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:12,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 09:09:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:12,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:12,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:12,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:12,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 09:09:12,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:09:12,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 09:09:12,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:12,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:12,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:12,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:12,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:12,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:09:12,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024093654] [2020-09-25 09:09:12,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:09:12,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:09:12,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102209688] [2020-09-25 09:09:12,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:09:12,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:09:12,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:09:12,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:09:12,998 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 5 states. [2020-09-25 09:09:13,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:09:13,369 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2020-09-25 09:09:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:09:13,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-25 09:09:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:09:13,389 INFO L225 Difference]: With dead ends: 109 [2020-09-25 09:09:13,390 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 09:09:13,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:09:13,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 09:09:13,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-25 09:09:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 09:09:13,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-25 09:09:13,463 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-25 09:09:13,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:09:13,464 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-25 09:09:13,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:09:13,464 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-25 09:09:13,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 09:09:13,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:09:13,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:09:13,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:09:13,467 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:09:13,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:09:13,468 INFO L82 PathProgramCache]: Analyzing trace with hash 215899159, now seen corresponding path program 1 times [2020-09-25 09:09:13,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:09:13,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761881644] [2020-09-25 09:09:13,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:09:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:13,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:13,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:13,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:15,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:15,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 09:09:15,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:09:15,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1796 [2020-09-25 09:09:15,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:15,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:15,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:09:15,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 09:09:15,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 09:09:15,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:09:15,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:09:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:15,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:15,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:15,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:09:15,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:15,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:09:15,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:15,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:15,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:15,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:15,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:15,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:09:15,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 09:09:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:15,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:15,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:15,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:15,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 09:09:15,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:09:15,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-25 09:09:15,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:15,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:15,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:15,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:15,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:15,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:09:15,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761881644] [2020-09-25 09:09:15,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:09:15,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:09:15,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972537680] [2020-09-25 09:09:15,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:09:15,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:09:15,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:09:15,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:09:15,648 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 11 states. [2020-09-25 09:09:16,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:09:16,368 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2020-09-25 09:09:16,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 09:09:16,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-09-25 09:09:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:09:16,373 INFO L225 Difference]: With dead ends: 101 [2020-09-25 09:09:16,373 INFO L226 Difference]: Without dead ends: 99 [2020-09-25 09:09:16,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-09-25 09:09:16,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-25 09:09:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2020-09-25 09:09:16,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-25 09:09:16,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-09-25 09:09:16,408 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 36 [2020-09-25 09:09:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:09:16,409 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-09-25 09:09:16,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:09:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-09-25 09:09:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 09:09:16,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:09:16,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:09:16,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:09:16,412 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:09:16,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:09:16,413 INFO L82 PathProgramCache]: Analyzing trace with hash -924714863, now seen corresponding path program 1 times [2020-09-25 09:09:16,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:09:16,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679404580] [2020-09-25 09:09:16,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:09:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:16,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:16,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:16,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:17,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:17,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 09:09:17,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:09:17,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 838 [2020-09-25 09:09:17,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:17,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:17,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:09:17,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 09:09:17,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 09:09:17,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:17,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:09:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:17,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:17,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:17,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:09:17,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:17,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:09:17,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:17,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:17,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:17,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:17,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:17,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:09:17,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 09:09:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:17,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:17,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:17,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:17,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 09:09:17,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:09:17,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 09:09:17,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:17,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:17,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:17,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:17,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:17,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:09:17,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679404580] [2020-09-25 09:09:17,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:09:17,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:09:17,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411731735] [2020-09-25 09:09:17,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:09:17,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:09:17,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:09:17,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:09:17,404 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 7 states. [2020-09-25 09:09:17,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:09:17,660 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2020-09-25 09:09:17,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 09:09:17,661 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-09-25 09:09:17,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:09:17,663 INFO L225 Difference]: With dead ends: 130 [2020-09-25 09:09:17,663 INFO L226 Difference]: Without dead ends: 106 [2020-09-25 09:09:17,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 09:09:17,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-25 09:09:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2020-09-25 09:09:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-25 09:09:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-09-25 09:09:17,676 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 37 [2020-09-25 09:09:17,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:09:17,676 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-09-25 09:09:17,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:09:17,676 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-09-25 09:09:17,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 09:09:17,678 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:09:17,678 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:09:17,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:09:17,679 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:09:17,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:09:17,679 INFO L82 PathProgramCache]: Analyzing trace with hash -435330977, now seen corresponding path program 1 times [2020-09-25 09:09:17,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:09:17,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25214465] [2020-09-25 09:09:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:09:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:17,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:17,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:17,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:19,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:19,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 09:09:19,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:09:19,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-09-25 09:09:19,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:19,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:19,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:09:19,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-25 09:09:19,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 09:09:19,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:19,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:09:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:19,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:19,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:19,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:09:19,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:19,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 09:09:19,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:19,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:19,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:19,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:19,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:19,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 09:09:19,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 09:09:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:19,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:19,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:19,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:19,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 09:09:19,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:09:19,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 09:09:19,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:19,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:19,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:19,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:19,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:19,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:09:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 09:09:19,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25214465] [2020-09-25 09:09:19,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:09:19,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:09:19,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005580670] [2020-09-25 09:09:19,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:09:19,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:09:19,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:09:19,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:09:19,109 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 5 states. [2020-09-25 09:09:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:09:19,280 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2020-09-25 09:09:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:09:19,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-09-25 09:09:19,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:09:19,282 INFO L225 Difference]: With dead ends: 122 [2020-09-25 09:09:19,282 INFO L226 Difference]: Without dead ends: 67 [2020-09-25 09:09:19,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:09:19,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-25 09:09:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-09-25 09:09:19,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-25 09:09:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-09-25 09:09:19,291 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 44 [2020-09-25 09:09:19,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:09:19,292 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-09-25 09:09:19,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:09:19,292 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-09-25 09:09:19,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 09:09:19,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:09:19,294 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:09:19,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:09:19,294 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:09:19,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:09:19,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1838346667, now seen corresponding path program 1 times [2020-09-25 09:09:19,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:09:19,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374606907] [2020-09-25 09:09:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:09:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:19,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:19,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:19,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:19,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:20,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:23,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:23,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 09:09:23,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 09:09:23,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4248 [2020-09-25 09:09:23,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:23,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:23,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:09:23,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 09:09:23,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 09:09:23,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:23,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:09:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:23,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:23,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:23,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:09:23,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:23,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 09:09:23,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:23,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:23,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:23,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:23,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:23,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:23,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 09:09:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:23,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:23,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:23,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:23,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 09:09:23,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:09:23,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 09:09:23,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:23,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:23,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:09:23,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:23,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 09:09:23,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 09:09:23,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374606907] [2020-09-25 09:09:23,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:09:23,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:09:23,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675806821] [2020-09-25 09:09:23,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:09:23,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:09:23,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:09:23,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:09:23,680 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 5 states. [2020-09-25 09:09:23,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:09:23,820 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2020-09-25 09:09:23,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:09:23,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-09-25 09:09:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:09:23,822 INFO L225 Difference]: With dead ends: 81 [2020-09-25 09:09:23,822 INFO L226 Difference]: Without dead ends: 67 [2020-09-25 09:09:23,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:09:23,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-25 09:09:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-09-25 09:09:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-25 09:09:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-09-25 09:09:23,830 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 48 [2020-09-25 09:09:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:09:23,831 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-09-25 09:09:23,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:09:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-09-25 09:09:23,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 09:09:23,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:09:23,835 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:09:23,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:09:23,835 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:09:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:09:23,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1324426848, now seen corresponding path program 1 times [2020-09-25 09:09:23,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:09:23,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866464892] [2020-09-25 09:09:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:09:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:23,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:23,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:24,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:26,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:26,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 09:09:26,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:09:26,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2236 [2020-09-25 09:09:26,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:26,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:26,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:09:26,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 09:09:26,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 09:09:26,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:26,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:09:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:26,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:26,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:26,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:09:26,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:26,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 09:09:26,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:26,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:26,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:26,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:26,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:26,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:26,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 09:09:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:26,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:26,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:26,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:26,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 09:09:26,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:09:26,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 09:09:26,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:26,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:26,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:26,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:26,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:26,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:26,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-25 09:09:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:26,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:26,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:26,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:09:26,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:26,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 09:09:26,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:26,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:26,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:26,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 09:09:26,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:26,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 09:09:26,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866464892] [2020-09-25 09:09:26,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:09:26,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:09:26,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364121861] [2020-09-25 09:09:26,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:09:26,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:09:26,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:09:26,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:09:26,212 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 9 states. [2020-09-25 09:09:26,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:09:26,447 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2020-09-25 09:09:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:09:26,448 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-09-25 09:09:26,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:09:26,449 INFO L225 Difference]: With dead ends: 105 [2020-09-25 09:09:26,449 INFO L226 Difference]: Without dead ends: 82 [2020-09-25 09:09:26,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-25 09:09:26,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-25 09:09:26,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-09-25 09:09:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-25 09:09:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-09-25 09:09:26,457 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 55 [2020-09-25 09:09:26,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:09:26,458 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-09-25 09:09:26,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:09:26,458 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-09-25 09:09:26,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 09:09:26,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:09:26,459 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:09:26,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 09:09:26,460 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:09:26,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:09:26,460 INFO L82 PathProgramCache]: Analyzing trace with hash 958747934, now seen corresponding path program 2 times [2020-09-25 09:09:26,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:09:26,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218488730] [2020-09-25 09:09:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:09:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:26,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:26,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:26,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:30,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:30,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 09:09:30,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:09:30,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3931 [2020-09-25 09:09:30,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:30,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:30,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:09:30,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 09:09:30,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 09:09:30,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:30,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:09:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:30,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:30,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:30,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:09:30,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:30,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 09:09:30,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:30,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:30,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:30,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:30,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:30,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:30,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 09:09:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:30,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:30,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:30,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:30,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 09:09:30,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:09:30,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 09:09:30,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:30,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:30,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:30,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:30,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:30,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:30,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-25 09:09:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:30,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:30,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:30,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:09:30,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:30,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 09:09:30,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:30,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:30,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:30,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 09:09:30,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:30,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 09:09:30,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218488730] [2020-09-25 09:09:30,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:09:30,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:09:30,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774835870] [2020-09-25 09:09:30,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:09:30,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:09:30,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:09:30,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:09:30,559 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 11 states. [2020-09-25 09:09:30,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:09:30,858 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2020-09-25 09:09:30,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 09:09:30,859 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-09-25 09:09:30,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:09:30,860 INFO L225 Difference]: With dead ends: 112 [2020-09-25 09:09:30,860 INFO L226 Difference]: Without dead ends: 89 [2020-09-25 09:09:30,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-25 09:09:30,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-25 09:09:30,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2020-09-25 09:09:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 09:09:30,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-09-25 09:09:30,883 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 62 [2020-09-25 09:09:30,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:09:30,884 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-09-25 09:09:30,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:09:30,884 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-09-25 09:09:30,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 09:09:30,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:09:30,886 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:09:30,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 09:09:30,887 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:09:30,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:09:30,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1147095904, now seen corresponding path program 3 times [2020-09-25 09:09:30,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:09:30,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764497909] [2020-09-25 09:09:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:09:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:30,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:30,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:31,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:35,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:35,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 09:09:35,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:09:35,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 09:09:35,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:35,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:35,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:09:35,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 09:09:35,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 09:09:35,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:35,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:09:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:35,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:35,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:35,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:09:35,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:35,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 09:09:35,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:35,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:35,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:35,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:35,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:35,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:35,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 09:09:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:35,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:35,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:35,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 09:09:35,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:35,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 09:09:35,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:35,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:35,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:09:35,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 09:09:35,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 09:09:35,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:36,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-25 09:09:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:36,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:36,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:36,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:09:36,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:36,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 09:09:36,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:36,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:36,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:36,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 09:09:36,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:36,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-09-25 09:09:36,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764497909] [2020-09-25 09:09:36,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:09:36,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 09:09:36,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072893785] [2020-09-25 09:09:36,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:09:36,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:09:36,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:09:36,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:09:36,147 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 7 states. [2020-09-25 09:09:36,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:09:36,361 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2020-09-25 09:09:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 09:09:36,362 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-09-25 09:09:36,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:09:36,363 INFO L225 Difference]: With dead ends: 137 [2020-09-25 09:09:36,363 INFO L226 Difference]: Without dead ends: 82 [2020-09-25 09:09:36,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:09:36,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-25 09:09:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-09-25 09:09:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 09:09:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-09-25 09:09:36,377 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 69 [2020-09-25 09:09:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:09:36,378 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-09-25 09:09:36,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:09:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-09-25 09:09:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 09:09:36,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:09:36,380 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:09:36,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 09:09:36,380 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:09:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:09:36,381 INFO L82 PathProgramCache]: Analyzing trace with hash 538725532, now seen corresponding path program 1 times [2020-09-25 09:09:36,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:09:36,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922298668] [2020-09-25 09:09:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:09:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:36,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:36,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:36,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:36,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:41,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:41,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:41,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:41,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-25 09:09:41,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 09:09:41,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 09:09:41,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:41,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:41,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:09:41,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 09:09:41,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 09:09:41,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:41,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:09:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:41,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:41,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:41,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:09:41,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:41,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 09:09:41,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:41,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:41,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:41,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:41,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:41,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:41,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 09:09:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:41,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:41,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:41,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:41,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 09:09:41,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:09:41,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-09-25 09:09:41,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:41,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:09:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 09:09:41,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:41,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-25 09:09:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:41,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:41,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:41,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:09:41,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:41,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:09:41,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:41,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:09:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 09:09:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:09:41,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-25 09:09:41,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922298668] [2020-09-25 09:09:41,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:09:41,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 09:09:41,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015709262] [2020-09-25 09:09:41,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 09:09:41,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:09:41,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 09:09:41,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-25 09:09:41,930 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 13 states. [2020-09-25 09:09:42,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:09:42,360 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2020-09-25 09:09:42,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 09:09:42,361 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2020-09-25 09:09:42,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:09:42,362 INFO L225 Difference]: With dead ends: 137 [2020-09-25 09:09:42,362 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 09:09:42,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-09-25 09:09:42,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 09:09:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-09-25 09:09:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-25 09:09:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-09-25 09:09:42,369 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 75 [2020-09-25 09:09:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:09:42,370 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-09-25 09:09:42,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 09:09:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-09-25 09:09:42,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-25 09:09:42,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:09:42,371 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:09:42,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 09:09:42,372 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:09:42,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:09:42,372 INFO L82 PathProgramCache]: Analyzing trace with hash -605227112, now seen corresponding path program 2 times [2020-09-25 09:09:42,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:09:42,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869882309] [2020-09-25 09:09:42,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:09:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:42,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:42,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:42,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:42,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:42,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:47,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:47,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-25 09:09:47,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 09:09:47,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 09:09:47,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:47,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:47,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 09:09:47,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 09:09:47,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 09:09:47,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:47,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:09:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:47,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:47,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:47,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:09:47,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:47,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 09:09:47,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:47,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:47,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:47,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:47,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:47,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:47,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 09:09:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:47,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:47,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:48,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:48,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:09:48,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:09:48,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538 [2020-09-25 09:09:48,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:48,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:48,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:09:48,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:48,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 09:09:48,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:48,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-25 09:09:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:48,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:48,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:48,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:09:48,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:48,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 09:09:48,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:48,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:48,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:48,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 09:09:48,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:48,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-25 09:09:48,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869882309] [2020-09-25 09:09:48,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:09:48,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 09:09:48,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937583620] [2020-09-25 09:09:48,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 09:09:48,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:09:48,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 09:09:48,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-09-25 09:09:48,257 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 15 states. [2020-09-25 09:09:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:09:48,792 INFO L93 Difference]: Finished difference Result 147 states and 151 transitions. [2020-09-25 09:09:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 09:09:48,792 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 81 [2020-09-25 09:09:48,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:09:48,793 INFO L225 Difference]: With dead ends: 147 [2020-09-25 09:09:48,793 INFO L226 Difference]: Without dead ends: 92 [2020-09-25 09:09:48,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-09-25 09:09:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-25 09:09:48,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-09-25 09:09:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-25 09:09:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-09-25 09:09:48,801 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 81 [2020-09-25 09:09:48,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:09:48,801 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-09-25 09:09:48,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 09:09:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-09-25 09:09:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-25 09:09:48,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:09:48,802 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:09:48,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 09:09:48,803 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:09:48,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:09:48,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1907914132, now seen corresponding path program 3 times [2020-09-25 09:09:48,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:09:48,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663819560] [2020-09-25 09:09:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:09:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:48,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:48,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:48,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:48,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:49,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:49,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:49,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:49,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:51,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:51,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:53,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:53,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-25 09:09:53,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 09:09:53,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 09:09:53,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:53,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 09:09:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 09:09:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 09:09:53,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:09:53,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:09:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:53,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:53,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:53,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:09:53,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:53,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 09:09:53,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:53,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:53,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:53,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:53,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:53,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:09:53,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 09:09:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:53,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:54,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:54,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:54,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:55,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:55,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 09:09:55,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 09:09:55,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1870 [2020-09-25 09:09:55,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:55,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:55,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 09:09:55,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:09:55,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 09:09:55,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:09:57,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-25 09:09:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:09:57,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:09:57,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:09:57,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:09:57,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:09:57,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 09:09:57,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:09:57,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:09:57,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:09:57,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 09:09:57,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:09:57,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:09:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-09-25 09:09:57,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663819560] [2020-09-25 09:09:57,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:09:57,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 09:09:57,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503053044] [2020-09-25 09:09:57,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 09:09:57,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:09:57,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 09:09:57,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-09-25 09:09:57,191 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 24 states.