/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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 [2020-09-24 19:32:51,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:32:51,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:32:51,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:32:51,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:32:51,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:32:51,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:32:51,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:32:51,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:32:51,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:32:51,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:32:51,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:32:51,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:32:51,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:32:51,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:32:51,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:32:51,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:32:51,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:32:51,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:32:51,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:32:51,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:32:51,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:32:51,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:32:51,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:32:51,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:32:51,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:32:51,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:32:51,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:32:51,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:32:51,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:32:51,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:32:51,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:32:51,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:32:51,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:32:51,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:32:51,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:32:51,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:32:51,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:32:51,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:32:51,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:32:51,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:32:51,701 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 [2020-09-24 19:32:51,728 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:32:51,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:32:51,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:32:51,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:32:51,730 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:32:51,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:32:51,731 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:32:51,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:32:51,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:32:51,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:32:51,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:32:51,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:32:51,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:32:51,732 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:32:51,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:32:51,733 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:32:51,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:32:51,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:32:51,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:32:51,733 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:32:51,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:32:51,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:32:51,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:32:51,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:32:51,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:32:51,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:32:51,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:32:51,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:32:51,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:32:51,736 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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:32:52,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:32:52,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:32:52,305 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:32:52,308 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:32:52,310 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:32:52,311 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-24 19:32:52,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08987c979/dfbb393d99854c9e8517a6be0b9a935d/FLAG25afc25c3 [2020-09-24 19:32:52,923 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:32:52,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-24 19:32:52,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08987c979/dfbb393d99854c9e8517a6be0b9a935d/FLAG25afc25c3 [2020-09-24 19:32:53,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08987c979/dfbb393d99854c9e8517a6be0b9a935d [2020-09-24 19:32:53,283 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:32:53,290 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:32:53,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:32:53,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:32:53,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:32:53,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:32:53" (1/1) ... [2020-09-24 19:32:53,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b599924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:32:53, skipping insertion in model container [2020-09-24 19:32:53,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:32:53" (1/1) ... [2020-09-24 19:32:53,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:32:53,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:32:53,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:32:53,594 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:32:53,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:32:53,630 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:32:53,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:32:53 WrapperNode [2020-09-24 19:32:53,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:32:53,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:32:53,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:32:53,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:32:53,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:32:53" (1/1) ... [2020-09-24 19:32:53,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:32:53" (1/1) ... [2020-09-24 19:32:53,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:32:53" (1/1) ... [2020-09-24 19:32:53,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:32:53" (1/1) ... [2020-09-24 19:32:53,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:32:53" (1/1) ... [2020-09-24 19:32:53,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:32:53" (1/1) ... [2020-09-24 19:32:53,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:32:53" (1/1) ... [2020-09-24 19:32:53,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:32:53,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:32:53,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:32:53,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:32:53,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:32:53" (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 [2020-09-24 19:32:53,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:32:53,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:32:53,847 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 19:32:53,847 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-24 19:32:53,847 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:32:53,847 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 19:32:53,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:32:53,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 19:32:53,848 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 19:32:53,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 19:32:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 19:32:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:32:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 19:32:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 19:32:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 19:32:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:32:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:32:54,187 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:32:54,187 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 19:32:54,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:32:54 BoogieIcfgContainer [2020-09-24 19:32:54,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:32:54,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:32:54,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:32:54,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:32:54,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:32:53" (1/3) ... [2020-09-24 19:32:54,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479081bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:32:54, skipping insertion in model container [2020-09-24 19:32:54,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:32:53" (2/3) ... [2020-09-24 19:32:54,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479081bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:32:54, skipping insertion in model container [2020-09-24 19:32:54,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:32:54" (3/3) ... [2020-09-24 19:32:54,213 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-09-24 19:32:54,224 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:32:54,234 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:32:54,256 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:32:54,284 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:32:54,284 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:32:54,284 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:32:54,284 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:32:54,284 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:32:54,285 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:32:54,285 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:32:54,285 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:32:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-24 19:32:54,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 19:32:54,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:32:54,315 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] [2020-09-24 19:32:54,316 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:32:54,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:32:54,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1392671971, now seen corresponding path program 1 times [2020-09-24 19:32:54,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:32:54,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702661175] [2020-09-24 19:32:54,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:32:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:32:54,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:54,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:54,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:32:54,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 19:32:54,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:32:54,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-09-24 19:32:54,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:32:54,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:32:54,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-24 19:32:54,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:32:54,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:32:54,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:32:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:32:54,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:54,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:32:54,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:32:54,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:32:54,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 19:32:54,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:32:54,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:32:54,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:32:54,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:32:54,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:32:54,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:32:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:32:54,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:54,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:32:54,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 19:32:54,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:32:54,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 19:32:54,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:32:54,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:32:54,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 19:32:54,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:32:54,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:32:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:32:54,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702661175] [2020-09-24 19:32:54,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:32:54,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:32:54,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365187657] [2020-09-24 19:32:54,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:32:54,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:32:54,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:32:54,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:32:54,978 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-09-24 19:32:55,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:32:55,193 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-24 19:32:55,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:32:55,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-24 19:32:55,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:32:55,212 INFO L225 Difference]: With dead ends: 94 [2020-09-24 19:32:55,212 INFO L226 Difference]: Without dead ends: 53 [2020-09-24 19:32:55,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:32:55,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-24 19:32:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-09-24 19:32:55,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-24 19:32:55,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-09-24 19:32:55,283 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-09-24 19:32:55,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:32:55,284 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-09-24 19:32:55,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:32:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-09-24 19:32:55,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 19:32:55,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:32:55,286 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] [2020-09-24 19:32:55,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:32:55,287 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:32:55,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:32:55,288 INFO L82 PathProgramCache]: Analyzing trace with hash 31734745, now seen corresponding path program 1 times [2020-09-24 19:32:55,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:32:55,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114186375] [2020-09-24 19:32:55,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:32:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:32:55,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:55,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:55,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:32:55,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 19:32:55,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:32:55,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-09-24 19:32:55,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:32:55,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:32:55,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 19:32:55,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 19:32:55,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:32:55,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:32:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:32:55,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:55,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:32:55,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:32:55,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:32:55,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:32:55,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:32:55,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:32:55,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:32:55,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:32:55,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:32:55,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:32:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:32:55,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:55,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:55,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:32:55,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 19:32:55,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:32:55,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-24 19:32:55,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:32:55,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:32:55,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:32:55,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:32:55,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:32:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:32:55,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114186375] [2020-09-24 19:32:55,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:32:55,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:32:55,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590010990] [2020-09-24 19:32:55,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:32:55,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:32:55,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:32:55,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:32:55,763 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 5 states. [2020-09-24 19:32:55,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:32:55,946 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2020-09-24 19:32:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:32:55,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-24 19:32:55,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:32:55,950 INFO L225 Difference]: With dead ends: 83 [2020-09-24 19:32:55,950 INFO L226 Difference]: Without dead ends: 68 [2020-09-24 19:32:55,951 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 [2020-09-24 19:32:55,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-24 19:32:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-24 19:32:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 19:32:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-24 19:32:55,967 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-24 19:32:55,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:32:55,967 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-24 19:32:55,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:32:55,968 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-24 19:32:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 19:32:55,969 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:32:55,969 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] [2020-09-24 19:32:55,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:32:55,970 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:32:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:32:55,970 INFO L82 PathProgramCache]: Analyzing trace with hash 215899159, now seen corresponding path program 1 times [2020-09-24 19:32:55,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:32:55,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063720963] [2020-09-24 19:32:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:32:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:32:55,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:56,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:56,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:56,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:32:56,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 19:32:56,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:32:56,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-24 19:32:56,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:32:56,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:32:56,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 19:32:56,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:32:56,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:32:57,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:32:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:32:57,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:57,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:32:57,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:32:57,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:32:57,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:32:57,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:32:57,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:32:57,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:32:57,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:32:57,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:32:57,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:32:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:32:57,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:57,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:57,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:32:57,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 19:32:57,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:32:57,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 19:32:57,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:32:57,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:32:57,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:32:57,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:32:57,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:32:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:32:57,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063720963] [2020-09-24 19:32:57,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:32:57,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 19:32:57,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200066772] [2020-09-24 19:32:57,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:32:57,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:32:57,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:32:57,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:32:57,099 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 7 states. [2020-09-24 19:32:57,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:32:57,333 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2020-09-24 19:32:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 19:32:57,334 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-24 19:32:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:32:57,336 INFO L225 Difference]: With dead ends: 92 [2020-09-24 19:32:57,336 INFO L226 Difference]: Without dead ends: 77 [2020-09-24 19:32:57,337 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 [2020-09-24 19:32:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-24 19:32:57,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-09-24 19:32:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-24 19:32:57,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-09-24 19:32:57,346 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 36 [2020-09-24 19:32:57,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:32:57,347 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-09-24 19:32:57,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:32:57,347 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-09-24 19:32:57,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 19:32:57,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:32:57,349 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 19:32:57,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:32:57,350 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:32:57,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:32:57,350 INFO L82 PathProgramCache]: Analyzing trace with hash -490137063, now seen corresponding path program 2 times [2020-09-24 19:32:57,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:32:57,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376552791] [2020-09-24 19:32:57,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:32:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:32:57,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:57,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:57,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:58,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:32:58,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 19:32:58,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:32:58,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-24 19:32:58,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:32:58,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:32:58,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:32:58,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:32:58,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:32:58,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:32:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:32:58,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:58,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:32:58,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:32:58,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:32:58,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:32:58,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:32:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:32:58,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:32:58,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:32:58,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:32:58,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:32:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:32:58,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:58,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:32:58,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 19:32:58,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:32:58,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 19:32:58,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:32:58,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:32:58,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:32:58,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 19:32:58,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:32:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 19:32:58,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376552791] [2020-09-24 19:32:58,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:32:58,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 19:32:58,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166370506] [2020-09-24 19:32:58,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:32:58,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:32:58,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:32:58,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:32:58,505 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 7 states. [2020-09-24 19:32:58,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:32:58,797 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2020-09-24 19:32:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 19:32:58,798 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-09-24 19:32:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:32:58,800 INFO L225 Difference]: With dead ends: 101 [2020-09-24 19:32:58,800 INFO L226 Difference]: Without dead ends: 64 [2020-09-24 19:32:58,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 19:32:58,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-24 19:32:58,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-09-24 19:32:58,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 19:32:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-09-24 19:32:58,823 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 43 [2020-09-24 19:32:58,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:32:58,823 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-09-24 19:32:58,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:32:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-09-24 19:32:58,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 19:32:58,828 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:32:58,829 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-09-24 19:32:58,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:32:58,829 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:32:58,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:32:58,829 INFO L82 PathProgramCache]: Analyzing trace with hash 589608213, now seen corresponding path program 1 times [2020-09-24 19:32:58,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:32:58,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010277912] [2020-09-24 19:32:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:32:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:32:58,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:58,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:58,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:59,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:32:59,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 19:32:59,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:32:59,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-24 19:32:59,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:32:59,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:32:59,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:32:59,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 19:32:59,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:32:59,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:32:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:32:59,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:32:59,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:32:59,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:32:59,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:32:59,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:32:59,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:32:59,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:32:59,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:32:59,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:32:59,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:32:59,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:32:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:32:59,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:00,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:00,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 19:33:00,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:00,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-24 19:33:00,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:00,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:33:00,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:33:00,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 19:33:00,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 19:33:00,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010277912] [2020-09-24 19:33:00,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:00,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 19:33:00,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763969377] [2020-09-24 19:33:00,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 19:33:00,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:00,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 19:33:00,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:33:00,103 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 9 states. [2020-09-24 19:33:00,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:00,449 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2020-09-24 19:33:00,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:33:00,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-24 19:33:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:00,451 INFO L225 Difference]: With dead ends: 107 [2020-09-24 19:33:00,451 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 19:33:00,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-09-24 19:33:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 19:33:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-09-24 19:33:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-24 19:33:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-09-24 19:33:00,469 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 49 [2020-09-24 19:33:00,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:00,471 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-09-24 19:33:00,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 19:33:00,471 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-09-24 19:33:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 19:33:00,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:00,472 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-09-24 19:33:00,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:33:00,475 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:00,475 INFO L82 PathProgramCache]: Analyzing trace with hash 92742417, now seen corresponding path program 2 times [2020-09-24 19:33:00,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:00,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243149089] [2020-09-24 19:33:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:00,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:00,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:00,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:00,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:01,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:01,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 19:33:01,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:33:01,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-24 19:33:01,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:01,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:33:01,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 19:33:01,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 19:33:01,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:01,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:01,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:01,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:01,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:01,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:01,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:33:01,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:01,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:01,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:01,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:01,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:01,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:33:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:01,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:01,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:01,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:01,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:33:01,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:33:01,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-09-24 19:33:01,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:01,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:01,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:01,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:01,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 19:33:01,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243149089] [2020-09-24 19:33:01,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:01,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 19:33:01,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114323181] [2020-09-24 19:33:01,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 19:33:01,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:01,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 19:33:01,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:33:01,827 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 9 states. [2020-09-24 19:33:02,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:02,144 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2020-09-24 19:33:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 19:33:02,145 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-09-24 19:33:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:02,147 INFO L225 Difference]: With dead ends: 104 [2020-09-24 19:33:02,147 INFO L226 Difference]: Without dead ends: 89 [2020-09-24 19:33:02,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-24 19:33:02,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-24 19:33:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2020-09-24 19:33:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-24 19:33:02,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-09-24 19:33:02,156 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 55 [2020-09-24 19:33:02,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:02,156 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-09-24 19:33:02,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 19:33:02,159 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-09-24 19:33:02,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 19:33:02,162 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:02,163 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 19:33:02,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:33:02,163 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:02,163 INFO L82 PathProgramCache]: Analyzing trace with hash -138713633, now seen corresponding path program 3 times [2020-09-24 19:33:02,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:02,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158372325] [2020-09-24 19:33:02,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:02,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:02,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:02,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:02,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:02,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:03,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:03,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 19:33:03,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:33:03,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-24 19:33:03,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:03,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:33:03,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 19:33:03,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 19:33:03,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:03,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:03,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:03,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:03,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:03,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:03,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:33:03,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:03,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:03,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:33:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:03,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:03,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:03,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:03,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:33:03,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:33:03,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-09-24 19:33:03,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:03,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:03,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:03,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:03,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 19:33:03,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158372325] [2020-09-24 19:33:03,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:03,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 19:33:03,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749573620] [2020-09-24 19:33:03,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 19:33:03,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:03,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 19:33:03,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:33:03,529 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 11 states. [2020-09-24 19:33:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:03,931 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2020-09-24 19:33:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 19:33:03,932 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-09-24 19:33:03,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:03,933 INFO L225 Difference]: With dead ends: 113 [2020-09-24 19:33:03,934 INFO L226 Difference]: Without dead ends: 98 [2020-09-24 19:33:03,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-24 19:33:03,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-24 19:33:03,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2020-09-24 19:33:03,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 19:33:03,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2020-09-24 19:33:03,943 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 62 [2020-09-24 19:33:03,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:03,944 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2020-09-24 19:33:03,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 19:33:03,944 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2020-09-24 19:33:03,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 19:33:03,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:03,945 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2020-09-24 19:33:03,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:33:03,946 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:03,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2016739503, now seen corresponding path program 4 times [2020-09-24 19:33:03,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:03,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282528305] [2020-09-24 19:33:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:03,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:04,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:04,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:04,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:04,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:04,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 19:33:04,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:33:04,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-24 19:33:04,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:04,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:33:04,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:33:04,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 19:33:04,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:04,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:05,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:05,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:05,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:05,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:05,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:33:05,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:05,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:05,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:05,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:05,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:05,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:33:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:05,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:05,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:05,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:33:05,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:05,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-24 19:33:05,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:05,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:33:05,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:33:05,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 19:33:05,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-24 19:33:05,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282528305] [2020-09-24 19:33:05,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:05,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 19:33:05,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820242220] [2020-09-24 19:33:05,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 19:33:05,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:05,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 19:33:05,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:33:05,239 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 11 states. [2020-09-24 19:33:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:05,616 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2020-09-24 19:33:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 19:33:05,617 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-09-24 19:33:05,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:05,618 INFO L225 Difference]: With dead ends: 149 [2020-09-24 19:33:05,618 INFO L226 Difference]: Without dead ends: 94 [2020-09-24 19:33:05,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-09-24 19:33:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-24 19:33:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-09-24 19:33:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-24 19:33:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-09-24 19:33:05,626 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 69 [2020-09-24 19:33:05,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:05,627 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-09-24 19:33:05,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 19:33:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-09-24 19:33:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-24 19:33:05,628 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:05,628 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 19:33:05,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 19:33:05,629 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:05,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:05,629 INFO L82 PathProgramCache]: Analyzing trace with hash -330918067, now seen corresponding path program 5 times [2020-09-24 19:33:05,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:05,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516528298] [2020-09-24 19:33:05,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:05,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:05,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:05,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:05,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:06,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:06,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:06,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:06,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:06,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-24 19:33:06,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 19:33:06,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1077 [2020-09-24 19:33:06,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:06,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 19:33:06,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:33:06,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 19:33:06,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:06,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:06,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:06,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:06,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:06,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:06,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:33:06,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:06,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:06,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:06,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:06,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:06,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:33:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:06,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:07,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:07,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:33:07,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:07,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-09-24 19:33:07,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:07,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 19:33:07,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:33:07,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 19:33:07,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-24 19:33:07,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516528298] [2020-09-24 19:33:07,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:07,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 19:33:07,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212871020] [2020-09-24 19:33:07,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 19:33:07,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:07,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 19:33:07,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-24 19:33:07,404 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 13 states. [2020-09-24 19:33:07,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:07,879 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2020-09-24 19:33:07,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 19:33:07,880 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2020-09-24 19:33:07,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:07,881 INFO L225 Difference]: With dead ends: 155 [2020-09-24 19:33:07,882 INFO L226 Difference]: Without dead ends: 100 [2020-09-24 19:33:07,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-09-24 19:33:07,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-24 19:33:07,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-09-24 19:33:07,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-24 19:33:07,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-09-24 19:33:07,893 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 75 [2020-09-24 19:33:07,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:07,893 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-09-24 19:33:07,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 19:33:07,894 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-09-24 19:33:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 19:33:07,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:07,895 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-09-24 19:33:07,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 19:33:07,896 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:07,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1474870711, now seen corresponding path program 6 times [2020-09-24 19:33:07,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:07,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822675386] [2020-09-24 19:33:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:07,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:08,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:08,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:08,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:08,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:09,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:09,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-24 19:33:09,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:33:09,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1265 [2020-09-24 19:33:09,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:09,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 19:33:09,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-24 19:33:09,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 19:33:09,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:09,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:09,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:09,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:09,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:09,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:09,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:33:09,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:09,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:09,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:09,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:09,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:09,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:33:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:09,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:09,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:09,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:09,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 19:33:09,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:33:09,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-09-24 19:33:09,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:09,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:09,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:09,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:09,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-24 19:33:09,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822675386] [2020-09-24 19:33:09,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:09,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 19:33:09,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163618627] [2020-09-24 19:33:09,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 19:33:09,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:09,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 19:33:09,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-24 19:33:09,728 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 13 states. [2020-09-24 19:33:10,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:10,096 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2020-09-24 19:33:10,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 19:33:10,098 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 81 [2020-09-24 19:33:10,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:10,100 INFO L225 Difference]: With dead ends: 134 [2020-09-24 19:33:10,100 INFO L226 Difference]: Without dead ends: 119 [2020-09-24 19:33:10,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-09-24 19:33:10,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-24 19:33:10,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2020-09-24 19:33:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-24 19:33:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2020-09-24 19:33:10,123 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 81 [2020-09-24 19:33:10,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:10,124 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2020-09-24 19:33:10,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 19:33:10,124 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2020-09-24 19:33:10,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-24 19:33:10,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:10,127 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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] [2020-09-24 19:33:10,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 19:33:10,132 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:10,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:10,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1356609447, now seen corresponding path program 7 times [2020-09-24 19:33:10,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:10,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768225116] [2020-09-24 19:33:10,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:10,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:10,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:10,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:10,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:11,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:11,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:11,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-24 19:33:11,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:33:11,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1126 [2020-09-24 19:33:11,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:11,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 19:33:11,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-24 19:33:11,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 19:33:11,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:11,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:11,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:11,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:11,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:11,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:11,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:33:11,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:11,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:11,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:11,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:11,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:11,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:33:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:11,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:11,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:11,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:11,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 19:33:11,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:33:11,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-09-24 19:33:11,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:11,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:11,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:11,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:11,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-24 19:33:11,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768225116] [2020-09-24 19:33:11,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:11,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 19:33:11,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692694773] [2020-09-24 19:33:11,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 19:33:11,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:11,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 19:33:11,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-24 19:33:11,953 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand 15 states. [2020-09-24 19:33:12,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:12,365 INFO L93 Difference]: Finished difference Result 143 states and 157 transitions. [2020-09-24 19:33:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 19:33:12,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 88 [2020-09-24 19:33:12,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:12,367 INFO L225 Difference]: With dead ends: 143 [2020-09-24 19:33:12,367 INFO L226 Difference]: Without dead ends: 128 [2020-09-24 19:33:12,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2020-09-24 19:33:12,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-24 19:33:12,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2020-09-24 19:33:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 19:33:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2020-09-24 19:33:12,374 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 88 [2020-09-24 19:33:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:12,374 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2020-09-24 19:33:12,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 19:33:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2020-09-24 19:33:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-24 19:33:12,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:12,376 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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] [2020-09-24 19:33:12,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 19:33:12,376 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:12,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:12,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1472717687, now seen corresponding path program 8 times [2020-09-24 19:33:12,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:12,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978336298] [2020-09-24 19:33:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:12,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:12,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:12,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:12,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:13,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:13,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:13,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-24 19:33:13,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:33:13,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-09-24 19:33:13,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:13,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 19:33:13,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:33:13,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 19:33:13,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:13,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:13,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:13,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:13,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:13,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:13,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:33:13,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:13,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:13,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:13,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:13,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:13,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:33:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:13,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:13,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:13,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 19:33:13,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:13,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-09-24 19:33:13,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:13,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 19:33:13,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:33:13,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 19:33:13,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-09-24 19:33:13,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978336298] [2020-09-24 19:33:13,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:13,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 19:33:13,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273325078] [2020-09-24 19:33:13,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 19:33:13,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:13,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 19:33:13,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-24 19:33:13,935 INFO L87 Difference]: Start difference. First operand 114 states and 123 transitions. Second operand 15 states. [2020-09-24 19:33:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:14,471 INFO L93 Difference]: Finished difference Result 197 states and 215 transitions. [2020-09-24 19:33:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 19:33:14,472 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 95 [2020-09-24 19:33:14,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:14,474 INFO L225 Difference]: With dead ends: 197 [2020-09-24 19:33:14,474 INFO L226 Difference]: Without dead ends: 124 [2020-09-24 19:33:14,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-09-24 19:33:14,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-24 19:33:14,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-09-24 19:33:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-24 19:33:14,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2020-09-24 19:33:14,488 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 95 [2020-09-24 19:33:14,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:14,488 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2020-09-24 19:33:14,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 19:33:14,489 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2020-09-24 19:33:14,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-24 19:33:14,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:14,490 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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] [2020-09-24 19:33:14,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 19:33:14,490 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:14,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:14,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1436643717, now seen corresponding path program 9 times [2020-09-24 19:33:14,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:14,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142826728] [2020-09-24 19:33:14,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:14,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:14,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:14,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:15,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:15,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:15,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-24 19:33:15,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:33:15,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-09-24 19:33:15,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:15,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 19:33:15,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:33:15,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 19:33:15,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:15,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:15,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:15,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:15,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:15,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:15,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:33:15,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:15,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:15,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:15,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:15,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:15,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:33:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:15,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:16,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:16,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 19:33:16,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:16,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-09-24 19:33:16,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:16,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 19:33:16,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:33:16,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 19:33:16,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-09-24 19:33:16,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142826728] [2020-09-24 19:33:16,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:16,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 19:33:16,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922677242] [2020-09-24 19:33:16,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 19:33:16,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:16,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 19:33:16,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-24 19:33:16,479 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand 17 states. [2020-09-24 19:33:17,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:17,230 INFO L93 Difference]: Finished difference Result 203 states and 221 transitions. [2020-09-24 19:33:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 19:33:17,230 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2020-09-24 19:33:17,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:17,231 INFO L225 Difference]: With dead ends: 203 [2020-09-24 19:33:17,232 INFO L226 Difference]: Without dead ends: 130 [2020-09-24 19:33:17,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-09-24 19:33:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-24 19:33:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-09-24 19:33:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-24 19:33:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2020-09-24 19:33:17,242 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 101 [2020-09-24 19:33:17,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:17,243 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2020-09-24 19:33:17,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 19:33:17,243 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2020-09-24 19:33:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-24 19:33:17,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:17,247 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2020-09-24 19:33:17,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 19:33:17,248 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash 777918849, now seen corresponding path program 10 times [2020-09-24 19:33:17,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:17,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922230578] [2020-09-24 19:33:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:17,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:17,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:17,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:17,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:18,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:18,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-09-24 19:33:18,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:33:18,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1152 [2020-09-24 19:33:18,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:18,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 19:33:18,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:33:18,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 19:33:18,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:18,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:18,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:18,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:18,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:18,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:18,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:33:18,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:18,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:18,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:18,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:18,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:18,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:33:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:18,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:19,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:19,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 19:33:19,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:19,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 573 [2020-09-24 19:33:19,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:19,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 19:33:19,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:33:19,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 19:33:19,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-09-24 19:33:19,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922230578] [2020-09-24 19:33:19,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:19,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 19:33:19,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274112020] [2020-09-24 19:33:19,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 19:33:19,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:19,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 19:33:19,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-09-24 19:33:19,416 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand 19 states. [2020-09-24 19:33:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:20,196 INFO L93 Difference]: Finished difference Result 209 states and 227 transitions. [2020-09-24 19:33:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 19:33:20,197 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 107 [2020-09-24 19:33:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:20,198 INFO L225 Difference]: With dead ends: 209 [2020-09-24 19:33:20,198 INFO L226 Difference]: Without dead ends: 136 [2020-09-24 19:33:20,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=1232, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 19:33:20,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-24 19:33:20,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-09-24 19:33:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-24 19:33:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2020-09-24 19:33:20,207 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 107 [2020-09-24 19:33:20,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:20,207 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2020-09-24 19:33:20,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 19:33:20,208 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2020-09-24 19:33:20,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-24 19:33:20,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:20,209 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 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] [2020-09-24 19:33:20,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 19:33:20,209 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:20,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:20,210 INFO L82 PathProgramCache]: Analyzing trace with hash -849095555, now seen corresponding path program 11 times [2020-09-24 19:33:20,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:20,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691486781] [2020-09-24 19:33:20,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:20,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:20,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:20,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:21,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:21,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-09-24 19:33:21,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:33:21,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1271 [2020-09-24 19:33:21,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:21,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 19:33:21,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:33:21,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 19:33:21,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:21,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:21,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:21,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:21,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:21,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:21,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:33:21,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:21,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:21,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:21,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:21,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:21,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:33:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:21,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:22,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:22,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 19:33:22,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:22,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-09-24 19:33:22,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 19:33:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:33:22,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 19:33:22,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-09-24 19:33:22,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691486781] [2020-09-24 19:33:22,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:22,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 19:33:22,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645473030] [2020-09-24 19:33:22,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 19:33:22,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:22,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 19:33:22,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-09-24 19:33:22,525 INFO L87 Difference]: Start difference. First operand 132 states and 141 transitions. Second operand 21 states. [2020-09-24 19:33:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:23,463 INFO L93 Difference]: Finished difference Result 215 states and 233 transitions. [2020-09-24 19:33:23,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 19:33:23,463 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 113 [2020-09-24 19:33:23,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:23,465 INFO L225 Difference]: With dead ends: 215 [2020-09-24 19:33:23,465 INFO L226 Difference]: Without dead ends: 142 [2020-09-24 19:33:23,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=1632, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 19:33:23,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-24 19:33:23,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-09-24 19:33:23,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-24 19:33:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 147 transitions. [2020-09-24 19:33:23,477 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 147 transitions. Word has length 113 [2020-09-24 19:33:23,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:23,477 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 147 transitions. [2020-09-24 19:33:23,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 19:33:23,478 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 147 transitions. [2020-09-24 19:33:23,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-24 19:33:23,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:23,479 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 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] [2020-09-24 19:33:23,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 19:33:23,479 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:23,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1369939335, now seen corresponding path program 12 times [2020-09-24 19:33:23,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:23,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531259012] [2020-09-24 19:33:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:23,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:23,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:24,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:24,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:24,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-09-24 19:33:24,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:33:24,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1228 [2020-09-24 19:33:24,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:24,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 19:33:24,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:33:24,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-24 19:33:24,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:24,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:24,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:24,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:24,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:24,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:24,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:33:24,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:24,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:24,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:24,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:24,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:24,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:33:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:24,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:25,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:25,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 19:33:25,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:25,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 738 [2020-09-24 19:33:25,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:25,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 19:33:25,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:33:25,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-24 19:33:25,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-09-24 19:33:25,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531259012] [2020-09-24 19:33:25,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:25,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 19:33:25,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044336217] [2020-09-24 19:33:25,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 19:33:25,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:25,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 19:33:25,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-09-24 19:33:25,937 INFO L87 Difference]: Start difference. First operand 138 states and 147 transitions. Second operand 23 states. [2020-09-24 19:33:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:26,951 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2020-09-24 19:33:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 19:33:26,952 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2020-09-24 19:33:26,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:26,953 INFO L225 Difference]: With dead ends: 221 [2020-09-24 19:33:26,953 INFO L226 Difference]: Without dead ends: 148 [2020-09-24 19:33:26,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=644, Invalid=1906, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 19:33:26,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-24 19:33:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-09-24 19:33:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-24 19:33:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 153 transitions. [2020-09-24 19:33:26,960 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 153 transitions. Word has length 119 [2020-09-24 19:33:26,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:26,961 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 153 transitions. [2020-09-24 19:33:26,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 19:33:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 153 transitions. [2020-09-24 19:33:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-09-24 19:33:26,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:26,962 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 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] [2020-09-24 19:33:26,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 19:33:26,963 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:26,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:26,963 INFO L82 PathProgramCache]: Analyzing trace with hash -376339595, now seen corresponding path program 13 times [2020-09-24 19:33:26,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:26,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601699075] [2020-09-24 19:33:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:27,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:27,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:27,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:28,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:28,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-09-24 19:33:28,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:33:28,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1262 [2020-09-24 19:33:28,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:28,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 19:33:28,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:33:28,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-24 19:33:28,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:28,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:28,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:28,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:28,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:28,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:28,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:33:28,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:28,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:28,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:28,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:28,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 19:33:28,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:33:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:28,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:29,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:29,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 19:33:29,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:29,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 995 [2020-09-24 19:33:29,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:29,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 19:33:29,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:33:29,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 19:33:29,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-09-24 19:33:29,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601699075] [2020-09-24 19:33:29,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:29,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 19:33:29,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473424729] [2020-09-24 19:33:29,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 19:33:29,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:29,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 19:33:29,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-09-24 19:33:29,761 INFO L87 Difference]: Start difference. First operand 144 states and 153 transitions. Second operand 25 states. [2020-09-24 19:33:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:30,940 INFO L93 Difference]: Finished difference Result 227 states and 245 transitions. [2020-09-24 19:33:30,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 19:33:30,941 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 125 [2020-09-24 19:33:30,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:30,942 INFO L225 Difference]: With dead ends: 227 [2020-09-24 19:33:30,942 INFO L226 Difference]: Without dead ends: 154 [2020-09-24 19:33:30,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=783, Invalid=2297, Unknown=0, NotChecked=0, Total=3080 [2020-09-24 19:33:30,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-24 19:33:30,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-09-24 19:33:30,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-24 19:33:30,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 159 transitions. [2020-09-24 19:33:30,950 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 159 transitions. Word has length 125 [2020-09-24 19:33:30,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:30,950 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 159 transitions. [2020-09-24 19:33:30,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 19:33:30,950 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 159 transitions. [2020-09-24 19:33:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-24 19:33:30,952 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:30,952 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 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] [2020-09-24 19:33:30,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 19:33:30,952 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:30,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:30,952 INFO L82 PathProgramCache]: Analyzing trace with hash -267061391, now seen corresponding path program 14 times [2020-09-24 19:33:30,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:30,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976558988] [2020-09-24 19:33:30,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:31,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:31,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:32,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:32,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-09-24 19:33:32,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:33:32,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1217 [2020-09-24 19:33:32,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:32,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 19:33:32,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:33:32,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-24 19:33:32,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:32,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:32,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:32,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:32,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:32,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:32,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:33:32,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:32,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:32,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:32,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:32,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:32,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:33:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:32,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:33,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:33,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 19:33:33,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:33,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1013 [2020-09-24 19:33:33,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 19:33:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:33:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-24 19:33:33,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-09-24 19:33:34,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976558988] [2020-09-24 19:33:34,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:34,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 19:33:34,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309712407] [2020-09-24 19:33:34,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 19:33:34,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:34,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 19:33:34,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-09-24 19:33:34,508 INFO L87 Difference]: Start difference. First operand 150 states and 159 transitions. Second operand 27 states. [2020-09-24 19:33:35,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:35,877 INFO L93 Difference]: Finished difference Result 233 states and 251 transitions. [2020-09-24 19:33:35,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-24 19:33:35,878 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 131 [2020-09-24 19:33:35,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:35,879 INFO L225 Difference]: With dead ends: 233 [2020-09-24 19:33:35,879 INFO L226 Difference]: Without dead ends: 160 [2020-09-24 19:33:35,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=725, Invalid=1825, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 19:33:35,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-24 19:33:35,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-09-24 19:33:35,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-24 19:33:35,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 165 transitions. [2020-09-24 19:33:35,886 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 165 transitions. Word has length 131 [2020-09-24 19:33:35,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:35,887 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 165 transitions. [2020-09-24 19:33:35,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 19:33:35,887 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 165 transitions. [2020-09-24 19:33:35,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-09-24 19:33:35,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:35,889 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 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] [2020-09-24 19:33:35,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 19:33:35,889 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:35,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1201176173, now seen corresponding path program 15 times [2020-09-24 19:33:35,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:35,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980785675] [2020-09-24 19:33:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:35,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:36,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:36,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:37,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:37,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-24 19:33:37,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:33:37,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1544 [2020-09-24 19:33:37,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:37,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 19:33:37,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:33:37,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-24 19:33:37,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:37,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:37,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:37,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:37,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:37,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:37,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:33:37,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:37,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:37,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:37,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:37,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:37,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:33:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:37,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking...