/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 13:04:05,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 13:04:05,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 13:04:05,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 13:04:05,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 13:04:05,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 13:04:05,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 13:04:05,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 13:04:05,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 13:04:05,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 13:04:05,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 13:04:05,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 13:04:05,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 13:04:05,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 13:04:05,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 13:04:05,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 13:04:05,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 13:04:05,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 13:04:05,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 13:04:05,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 13:04:05,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 13:04:05,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 13:04:05,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 13:04:05,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 13:04:05,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 13:04:05,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 13:04:05,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 13:04:05,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 13:04:05,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 13:04:05,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 13:04:05,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 13:04:05,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 13:04:05,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 13:04:05,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 13:04:05,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 13:04:05,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 13:04:05,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 13:04:05,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 13:04:05,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 13:04:05,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 13:04:05,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 13:04:05,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 13:04:05,632 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 13:04:05,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 13:04:05,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 13:04:05,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 13:04:05,634 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 13:04:05,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 13:04:05,635 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 13:04:05,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 13:04:05,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 13:04:05,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 13:04:05,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 13:04:05,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 13:04:05,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 13:04:05,636 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 13:04:05,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 13:04:05,637 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 13:04:05,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 13:04:05,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 13:04:05,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 13:04:05,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 13:04:05,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 13:04:05,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:04:05,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 13:04:05,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 13:04:05,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 13:04:05,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 13:04:05,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 13:04:05,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 13:04:05,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 13:04:05,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 13:04:06,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 13:04:06,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 13:04:06,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 13:04:06,205 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 13:04:06,206 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 13:04:06,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label22.c [2020-10-28 13:04:06,308 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c548a9ce5/c1814a764a874bd4893cec0839834e37/FLAG73d057db7 [2020-10-28 13:04:07,418 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 13:04:07,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label22.c [2020-10-28 13:04:07,458 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c548a9ce5/c1814a764a874bd4893cec0839834e37/FLAG73d057db7 [2020-10-28 13:04:07,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c548a9ce5/c1814a764a874bd4893cec0839834e37 [2020-10-28 13:04:07,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 13:04:07,903 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 13:04:07,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 13:04:07,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 13:04:07,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 13:04:07,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:04:07" (1/1) ... [2020-10-28 13:04:07,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e187d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:04:07, skipping insertion in model container [2020-10-28 13:04:07,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:04:07" (1/1) ... [2020-10-28 13:04:07,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 13:04:07,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 13:04:08,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:04:08,841 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 13:04:09,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:04:09,162 INFO L208 MainTranslator]: Completed translation [2020-10-28 13:04:09,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:04:09 WrapperNode [2020-10-28 13:04:09,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 13:04:09,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 13:04:09,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 13:04:09,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 13:04:09,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:04:09" (1/1) ... [2020-10-28 13:04:09,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:04:09" (1/1) ... [2020-10-28 13:04:09,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:04:09" (1/1) ... [2020-10-28 13:04:09,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:04:09" (1/1) ... [2020-10-28 13:04:09,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:04:09" (1/1) ... [2020-10-28 13:04:09,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:04:09" (1/1) ... [2020-10-28 13:04:09,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:04:09" (1/1) ... [2020-10-28 13:04:09,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 13:04:09,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 13:04:09,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 13:04:09,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 13:04:09,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:04:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:04:09,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 13:04:09,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 13:04:09,514 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 13:04:09,515 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 13:04:09,515 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 13:04:09,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 13:04:09,516 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 13:04:09,517 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 13:04:09,517 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 13:04:09,517 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 13:04:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 13:04:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 13:04:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 13:04:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 13:04:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 13:04:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 13:04:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 13:04:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 13:04:09,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 13:04:09,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 13:04:09,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 13:04:12,765 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 13:04:12,765 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 13:04:12,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:04:12 BoogieIcfgContainer [2020-10-28 13:04:12,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 13:04:12,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 13:04:12,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 13:04:12,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 13:04:12,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:04:07" (1/3) ... [2020-10-28 13:04:12,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbd1a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:04:12, skipping insertion in model container [2020-10-28 13:04:12,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:04:09" (2/3) ... [2020-10-28 13:04:12,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbd1a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:04:12, skipping insertion in model container [2020-10-28 13:04:12,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:04:12" (3/3) ... [2020-10-28 13:04:12,779 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label22.c [2020-10-28 13:04:12,792 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 13:04:12,799 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 13:04:12,814 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 13:04:12,847 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 13:04:12,847 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 13:04:12,848 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 13:04:12,848 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 13:04:12,848 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 13:04:12,848 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 13:04:12,848 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 13:04:12,848 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 13:04:12,878 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-28 13:04:12,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 13:04:12,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:12,887 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] [2020-10-28 13:04:12,888 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:12,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:12,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1117149967, now seen corresponding path program 1 times [2020-10-28 13:04:12,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:12,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124160709] [2020-10-28 13:04:12,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:13,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:13,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:13,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 13:04:13,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:13,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-28 13:04:13,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:13,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:13,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:04:13,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:04:13,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 13:04:13,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 13:04:13,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:13,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:13,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:13,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:13,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:13,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 13:04:13,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:13,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:13,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:04:13,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:13,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:04:13,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:04:13,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124160709] [2020-10-28 13:04:13,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:04:13,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 13:04:13,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234311254] [2020-10-28 13:04:13,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 13:04:13,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:04:13,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 13:04:13,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 13:04:13,998 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-28 13:04:25,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:25,875 INFO L93 Difference]: Finished difference Result 1245 states and 2226 transitions. [2020-10-28 13:04:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:04:25,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-28 13:04:25,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:25,900 INFO L225 Difference]: With dead ends: 1245 [2020-10-28 13:04:25,901 INFO L226 Difference]: Without dead ends: 725 [2020-10-28 13:04:25,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:04:25,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2020-10-28 13:04:26,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 713. [2020-10-28 13:04:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-10-28 13:04:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1130 transitions. [2020-10-28 13:04:26,057 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1130 transitions. Word has length 25 [2020-10-28 13:04:26,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:26,058 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1130 transitions. [2020-10-28 13:04:26,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 13:04:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1130 transitions. [2020-10-28 13:04:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 13:04:26,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:26,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 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] [2020-10-28 13:04:26,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 13:04:26,065 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:26,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:26,066 INFO L82 PathProgramCache]: Analyzing trace with hash -633446725, now seen corresponding path program 1 times [2020-10-28 13:04:26,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:26,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410272891] [2020-10-28 13:04:26,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:26,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:27,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:27,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 13:04:27,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:27,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 921 [2020-10-28 13:04:27,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:27,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:27,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:04:27,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:04:27,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 13:04:27,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:27,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:27,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:27,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:27,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:27,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:27,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 13:04:27,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:27,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:27,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:04:27,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:27,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:04:27,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:04:27,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:04:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:27,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:27,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:27,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 13:04:27,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:27,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-28 13:04:27,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:27,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:27,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:27,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:04:27,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 13:04:27,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:27,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:04:27,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410272891] [2020-10-28 13:04:27,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:04:27,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:04:27,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709476331] [2020-10-28 13:04:27,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:04:27,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:04:27,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:04:27,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:04:27,626 INFO L87 Difference]: Start difference. First operand 713 states and 1130 transitions. Second operand 7 states. [2020-10-28 13:04:36,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:36,658 INFO L93 Difference]: Finished difference Result 2091 states and 3342 transitions. [2020-10-28 13:04:36,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:04:36,659 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-28 13:04:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:36,672 INFO L225 Difference]: With dead ends: 2091 [2020-10-28 13:04:36,672 INFO L226 Difference]: Without dead ends: 1384 [2020-10-28 13:04:36,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:04:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2020-10-28 13:04:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1342. [2020-10-28 13:04:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1342 states. [2020-10-28 13:04:36,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1857 transitions. [2020-10-28 13:04:36,752 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1857 transitions. Word has length 97 [2020-10-28 13:04:36,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:36,753 INFO L481 AbstractCegarLoop]: Abstraction has 1342 states and 1857 transitions. [2020-10-28 13:04:36,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:04:36,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1857 transitions. [2020-10-28 13:04:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 13:04:36,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:36,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:04:36,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 13:04:36,758 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:36,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:36,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1748007243, now seen corresponding path program 1 times [2020-10-28 13:04:36,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:36,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115364066] [2020-10-28 13:04:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:36,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:36,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:38,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:38,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 13:04:38,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:04:38,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1653 [2020-10-28 13:04:38,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:38,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:38,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:04:38,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:04:38,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 13:04:38,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:04:38,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:38,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:38,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:38,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:38,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 13:04:38,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:38,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:38,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:04:38,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:38,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:04:38,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:38,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:04:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:38,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:38,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:38,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 13:04:38,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:38,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-28 13:04:38,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:38,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:38,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:38,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:04:38,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:04:38,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:04:39,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115364066] [2020-10-28 13:04:39,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:04:39,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 13:04:39,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370764017] [2020-10-28 13:04:39,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:04:39,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:04:39,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:04:39,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:04:39,125 INFO L87 Difference]: Start difference. First operand 1342 states and 1857 transitions. Second operand 8 states. [2020-10-28 13:04:49,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:49,512 INFO L93 Difference]: Finished difference Result 3022 states and 4105 transitions. [2020-10-28 13:04:49,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:04:49,517 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 105 [2020-10-28 13:04:49,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:49,528 INFO L225 Difference]: With dead ends: 3022 [2020-10-28 13:04:49,528 INFO L226 Difference]: Without dead ends: 1686 [2020-10-28 13:04:49,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:04:49,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2020-10-28 13:04:49,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1656. [2020-10-28 13:04:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1656 states. [2020-10-28 13:04:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2182 transitions. [2020-10-28 13:04:49,595 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2182 transitions. Word has length 105 [2020-10-28 13:04:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:49,595 INFO L481 AbstractCegarLoop]: Abstraction has 1656 states and 2182 transitions. [2020-10-28 13:04:49,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:04:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2182 transitions. [2020-10-28 13:04:49,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-28 13:04:49,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:49,600 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 13:04:49,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 13:04:49,601 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:49,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:49,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1081141847, now seen corresponding path program 1 times [2020-10-28 13:04:49,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:49,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44844529] [2020-10-28 13:04:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:49,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:49,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:49,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:50,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:54,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:54,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-28 13:04:54,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:04:54,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 13:04:54,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:54,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:54,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:54,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-28 13:04:54,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 13:04:54,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:54,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:54,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:54,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:54,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:54,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:54,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:04:54,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:54,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:54,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:04:54,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:54,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:04:54,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:54,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:04:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:54,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:55,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:55,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 13:04:55,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:55,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-28 13:04:55,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:55,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:55,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:04:55,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:55,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 13:04:55,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:55,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-28 13:04:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:55,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:55,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:55,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 13:04:55,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:55,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-28 13:04:55,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:55,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:55,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:55,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:04:55,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:04:55,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:04:55,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44844529] [2020-10-28 13:04:55,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:04:55,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:04:55,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585783851] [2020-10-28 13:04:55,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:04:55,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:04:55,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:04:55,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:04:55,403 INFO L87 Difference]: Start difference. First operand 1656 states and 2182 transitions. Second operand 7 states. [2020-10-28 13:05:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:06,969 INFO L93 Difference]: Finished difference Result 4331 states and 5933 transitions. [2020-10-28 13:05:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:05:06,974 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 200 [2020-10-28 13:05:06,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:06,996 INFO L225 Difference]: With dead ends: 4331 [2020-10-28 13:05:06,996 INFO L226 Difference]: Without dead ends: 2988 [2020-10-28 13:05:07,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:05:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2020-10-28 13:05:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2930. [2020-10-28 13:05:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2930 states. [2020-10-28 13:05:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2930 states to 2930 states and 3609 transitions. [2020-10-28 13:05:07,133 INFO L78 Accepts]: Start accepts. Automaton has 2930 states and 3609 transitions. Word has length 200 [2020-10-28 13:05:07,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:07,135 INFO L481 AbstractCegarLoop]: Abstraction has 2930 states and 3609 transitions. [2020-10-28 13:05:07,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:05:07,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2930 states and 3609 transitions. [2020-10-28 13:05:07,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-28 13:05:07,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:07,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-28 13:05:07,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 13:05:07,150 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:07,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1375945531, now seen corresponding path program 1 times [2020-10-28 13:05:07,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:07,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234539368] [2020-10-28 13:05:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:07,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:08,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:09,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:09,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-28 13:05:09,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:05:09,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1768 [2020-10-28 13:05:09,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:09,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:09,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:09,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-28 13:05:09,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 13:05:09,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:09,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:09,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:09,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:09,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:09,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:09,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:05:09,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:09,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:09,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:09,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:09,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:09,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 13:05:09,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:09,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:09,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:09,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:05:09,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:09,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-28 13:05:09,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:09,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:09,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:09,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:09,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-28 13:05:09,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:05:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:05:10,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234539368] [2020-10-28 13:05:10,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:10,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:05:10,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400300612] [2020-10-28 13:05:10,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:05:10,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:10,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:05:10,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:05:10,119 INFO L87 Difference]: Start difference. First operand 2930 states and 3609 transitions. Second operand 5 states. [2020-10-28 13:05:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:20,454 INFO L93 Difference]: Finished difference Result 5542 states and 7332 transitions. [2020-10-28 13:05:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:05:20,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 311 [2020-10-28 13:05:20,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:20,483 INFO L225 Difference]: With dead ends: 5542 [2020-10-28 13:05:20,483 INFO L226 Difference]: Without dead ends: 4172 [2020-10-28 13:05:20,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:05:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2020-10-28 13:05:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 4170. [2020-10-28 13:05:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4170 states. [2020-10-28 13:05:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4170 states to 4170 states and 5059 transitions. [2020-10-28 13:05:20,632 INFO L78 Accepts]: Start accepts. Automaton has 4170 states and 5059 transitions. Word has length 311 [2020-10-28 13:05:20,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:20,633 INFO L481 AbstractCegarLoop]: Abstraction has 4170 states and 5059 transitions. [2020-10-28 13:05:20,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:05:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 4170 states and 5059 transitions. [2020-10-28 13:05:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2020-10-28 13:05:20,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:20,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-28 13:05:20,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 13:05:20,642 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:20,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:20,643 INFO L82 PathProgramCache]: Analyzing trace with hash -50254977, now seen corresponding path program 1 times [2020-10-28 13:05:20,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:20,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583473349] [2020-10-28 13:05:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:20,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:21,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:23,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:23,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 393 [2020-10-28 13:05:23,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:05:23,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2599 [2020-10-28 13:05:23,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:23,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:23,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:23,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:05:23,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 13:05:23,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:23,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:23,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:23,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:23,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:23,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:23,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 13:05:23,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:23,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:23,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:23,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:23,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:23,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:23,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:23,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:24,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:24,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:05:24,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:24,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-28 13:05:24,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:24,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:24,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:24,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:24,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:05:24,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:05:24,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 13:05:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:24,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:24,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:24,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 13:05:24,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:24,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-28 13:05:24,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:24,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:24,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:24,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:05:24,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:05:24,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:05:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:05:24,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583473349] [2020-10-28 13:05:24,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:24,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:05:24,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462252174] [2020-10-28 13:05:24,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:05:24,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:24,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:05:24,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:05:24,832 INFO L87 Difference]: Start difference. First operand 4170 states and 5059 transitions. Second operand 7 states. [2020-10-28 13:05:37,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:37,554 INFO L93 Difference]: Finished difference Result 9658 states and 12156 transitions. [2020-10-28 13:05:37,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:05:37,556 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 379 [2020-10-28 13:05:37,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:37,588 INFO L225 Difference]: With dead ends: 9658 [2020-10-28 13:05:37,589 INFO L226 Difference]: Without dead ends: 5801 [2020-10-28 13:05:37,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:05:37,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2020-10-28 13:05:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 5775. [2020-10-28 13:05:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5775 states. [2020-10-28 13:05:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5775 states to 5775 states and 6988 transitions. [2020-10-28 13:05:37,771 INFO L78 Accepts]: Start accepts. Automaton has 5775 states and 6988 transitions. Word has length 379 [2020-10-28 13:05:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:37,772 INFO L481 AbstractCegarLoop]: Abstraction has 5775 states and 6988 transitions. [2020-10-28 13:05:37,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:05:37,772 INFO L276 IsEmpty]: Start isEmpty. Operand 5775 states and 6988 transitions. [2020-10-28 13:05:37,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-10-28 13:05:37,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:37,781 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:05:37,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 13:05:37,782 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:37,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:37,782 INFO L82 PathProgramCache]: Analyzing trace with hash -606650419, now seen corresponding path program 1 times [2020-10-28 13:05:37,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:37,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722969546] [2020-10-28 13:05:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:37,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:38,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:38,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 394 [2020-10-28 13:05:38,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:38,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 812 [2020-10-28 13:05:38,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:38,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:38,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:38,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 367 [2020-10-28 13:05:38,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 13:05:38,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:38,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:38,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:38,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:38,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:38,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:38,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:05:38,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:38,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:38,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:38,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:38,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:38,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:05:38,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:38,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:39,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:39,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:05:39,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:39,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-28 13:05:39,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:39,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:39,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:39,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:39,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:39,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:05:39,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:05:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:39,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:39,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:39,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 13:05:39,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:39,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-28 13:05:39,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:39,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:39,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:39,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:39,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 13:05:39,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 13:05:39,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722969546] [2020-10-28 13:05:39,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:39,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:05:39,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561414561] [2020-10-28 13:05:39,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:05:39,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:39,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:05:39,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:05:39,550 INFO L87 Difference]: Start difference. First operand 5775 states and 6988 transitions. Second operand 5 states. [2020-10-28 13:05:52,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:52,161 INFO L93 Difference]: Finished difference Result 13753 states and 17172 transitions. [2020-10-28 13:05:52,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:05:52,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 380 [2020-10-28 13:05:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:52,206 INFO L225 Difference]: With dead ends: 13753 [2020-10-28 13:05:52,206 INFO L226 Difference]: Without dead ends: 7662 [2020-10-28 13:05:52,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:05:52,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2020-10-28 13:05:52,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 7347. [2020-10-28 13:05:52,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7347 states. [2020-10-28 13:05:52,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7347 states to 7347 states and 8755 transitions. [2020-10-28 13:05:52,430 INFO L78 Accepts]: Start accepts. Automaton has 7347 states and 8755 transitions. Word has length 380 [2020-10-28 13:05:52,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:52,431 INFO L481 AbstractCegarLoop]: Abstraction has 7347 states and 8755 transitions. [2020-10-28 13:05:52,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:05:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 7347 states and 8755 transitions. [2020-10-28 13:05:52,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-10-28 13:05:52,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:52,439 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-28 13:05:52,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 13:05:52,440 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:52,441 INFO L82 PathProgramCache]: Analyzing trace with hash 36522286, now seen corresponding path program 1 times [2020-10-28 13:05:52,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:52,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127479722] [2020-10-28 13:05:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:52,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:52,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:55,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:55,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 424 [2020-10-28 13:05:55,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:05:55,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2995 [2020-10-28 13:05:55,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:55,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:55,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:55,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:05:55,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 13:05:55,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:55,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:55,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:55,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:55,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:55,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:55,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:05:55,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:55,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:55,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:55,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:55,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:55,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:55,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:55,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:56,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:56,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:05:56,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:56,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-28 13:05:56,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:56,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:56,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:05:56,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:56,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 13:05:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:56,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:56,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:56,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:05:56,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:56,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-28 13:05:56,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:56,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:56,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:56,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:05:56,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 13:05:56,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:05:56,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127479722] [2020-10-28 13:05:56,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:56,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:05:56,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611957957] [2020-10-28 13:05:56,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:05:56,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:56,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:05:56,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:05:56,983 INFO L87 Difference]: Start difference. First operand 7347 states and 8755 transitions. Second operand 7 states. [2020-10-28 13:06:09,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:06:09,983 INFO L93 Difference]: Finished difference Result 16340 states and 19553 transitions. [2020-10-28 13:06:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 13:06:09,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 410 [2020-10-28 13:06:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:06:10,042 INFO L225 Difference]: With dead ends: 16340 [2020-10-28 13:06:10,042 INFO L226 Difference]: Without dead ends: 9306 [2020-10-28 13:06:10,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 13:06:10,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9306 states. [2020-10-28 13:06:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9306 to 8971. [2020-10-28 13:06:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8971 states. [2020-10-28 13:06:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8971 states to 8971 states and 10647 transitions. [2020-10-28 13:06:10,334 INFO L78 Accepts]: Start accepts. Automaton has 8971 states and 10647 transitions. Word has length 410 [2020-10-28 13:06:10,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:06:10,335 INFO L481 AbstractCegarLoop]: Abstraction has 8971 states and 10647 transitions. [2020-10-28 13:06:10,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:06:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 8971 states and 10647 transitions. [2020-10-28 13:06:10,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-10-28 13:06:10,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:06:10,349 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:06:10,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 13:06:10,350 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:06:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:06:10,351 INFO L82 PathProgramCache]: Analyzing trace with hash 635735094, now seen corresponding path program 1 times [2020-10-28 13:06:10,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:06:10,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865984455] [2020-10-28 13:06:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:06:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:10,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:11,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:11,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 436 [2020-10-28 13:06:11,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:11,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 862 [2020-10-28 13:06:11,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:11,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:11,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:11,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:06:11,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 13:06:11,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:06:11,692 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 13:06:11,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:06:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:11,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:11,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:11,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:06:11,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:11,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:06:11,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:11,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:11,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:11,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:11,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:11,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:06:11,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:06:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:11,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:11,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:11,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:06:11,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:11,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 13:06:11,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:11,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:11,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:11,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:11,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:11,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:06:12,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:06:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:12,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:12,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:12,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:06:12,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:12,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-28 13:06:12,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:12,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:12,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:06:12,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:12,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:06:12,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-28 13:06:12,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865984455] [2020-10-28 13:06:12,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:06:12,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:06:12,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694271591] [2020-10-28 13:06:12,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:06:12,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:06:12,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:06:12,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:06:12,483 INFO L87 Difference]: Start difference. First operand 8971 states and 10647 transitions. Second operand 5 states. [2020-10-28 13:06:23,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:06:23,113 INFO L93 Difference]: Finished difference Result 18997 states and 23530 transitions. [2020-10-28 13:06:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:06:23,117 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 422 [2020-10-28 13:06:23,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:06:23,164 INFO L225 Difference]: With dead ends: 18997 [2020-10-28 13:06:23,165 INFO L226 Difference]: Without dead ends: 12207 [2020-10-28 13:06:23,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:06:23,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12207 states. [2020-10-28 13:06:23,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12207 to 12189. [2020-10-28 13:06:23,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12189 states. [2020-10-28 13:06:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12189 states to 12189 states and 14927 transitions. [2020-10-28 13:06:23,632 INFO L78 Accepts]: Start accepts. Automaton has 12189 states and 14927 transitions. Word has length 422 [2020-10-28 13:06:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:06:23,633 INFO L481 AbstractCegarLoop]: Abstraction has 12189 states and 14927 transitions. [2020-10-28 13:06:23,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:06:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 12189 states and 14927 transitions. [2020-10-28 13:06:23,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-10-28 13:06:23,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:06:23,640 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:06:23,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 13:06:23,641 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:06:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:06:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1181499166, now seen corresponding path program 1 times [2020-10-28 13:06:23,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:06:23,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891210903] [2020-10-28 13:06:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:06:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:23,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:24,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:25,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:25,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 510 [2020-10-28 13:06:25,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:06:25,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2117 [2020-10-28 13:06:25,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:25,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:25,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:06:25,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:06:25,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 13:06:25,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:26,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:06:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:26,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:26,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:26,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:06:26,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:26,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 13:06:26,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:26,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:26,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:26,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:26,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:26,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:06:26,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:06:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:26,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:26,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:26,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:06:26,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:26,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-28 13:06:26,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:26,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:26,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:26,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:26,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:26,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:26,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:06:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:26,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:26,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:26,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:06:26,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:26,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-28 13:06:26,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:26,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:06:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:06:26,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:06:26,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:06:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:26,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:26,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:26,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:26,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 13:06:26,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:06:26,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-28 13:06:26,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:26,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:26,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:26,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:06:26,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 13:06:26,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 174 proven. 18 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-28 13:06:26,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891210903] [2020-10-28 13:06:26,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:06:26,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 13:06:26,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606753098] [2020-10-28 13:06:26,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 13:06:26,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:06:26,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 13:06:26,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:06:26,977 INFO L87 Difference]: Start difference. First operand 12189 states and 14927 transitions. Second operand 6 states. [2020-10-28 13:06:28,886 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 13:06:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:06:39,967 INFO L93 Difference]: Finished difference Result 27215 states and 34361 transitions. [2020-10-28 13:06:39,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 13:06:39,970 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 494 [2020-10-28 13:06:39,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:06:40,044 INFO L225 Difference]: With dead ends: 27215 [2020-10-28 13:06:40,044 INFO L226 Difference]: Without dead ends: 15339 [2020-10-28 13:06:40,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:06:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15339 states. [2020-10-28 13:06:40,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15339 to 15019. [2020-10-28 13:06:40,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15019 states. [2020-10-28 13:06:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15019 states to 15019 states and 18193 transitions. [2020-10-28 13:06:40,486 INFO L78 Accepts]: Start accepts. Automaton has 15019 states and 18193 transitions. Word has length 494 [2020-10-28 13:06:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:06:40,487 INFO L481 AbstractCegarLoop]: Abstraction has 15019 states and 18193 transitions. [2020-10-28 13:06:40,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 13:06:40,488 INFO L276 IsEmpty]: Start isEmpty. Operand 15019 states and 18193 transitions. [2020-10-28 13:06:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2020-10-28 13:06:40,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:06:40,501 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:06:40,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 13:06:40,502 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:06:40,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:06:40,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1874050269, now seen corresponding path program 1 times [2020-10-28 13:06:40,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:06:40,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451799077] [2020-10-28 13:06:40,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:06:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:40,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:41,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:43,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:45,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:45,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 593 [2020-10-28 13:06:45,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:06:45,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-28 13:06:45,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:45,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:45,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:45,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 492 [2020-10-28 13:06:45,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 13:06:45,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:46,014 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 13:06:46,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:06:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:46,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:46,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:46,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:06:46,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:46,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:06:46,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:46,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:46,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:46,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:06:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:46,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:46,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:46,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:06:46,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:46,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-28 13:06:46,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:46,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:46,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:46,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:46,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:46,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:46,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:06:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:46,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:46,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:46,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:06:46,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:46,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 13:06:46,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:46,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:46,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:46,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:06:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:46,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:46,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:46,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 13:06:46,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:46,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 13:06:46,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:46,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:46,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:06:46,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:46,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 13:06:46,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:46,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2020-10-28 13:06:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:46,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:46,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:46,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 13:06:46,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:46,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-28 13:06:46,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:46,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:46,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:46,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:06:46,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 13:06:46,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 285 proven. 2 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-28 13:06:46,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451799077] [2020-10-28 13:06:46,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:06:46,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:06:46,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307686329] [2020-10-28 13:06:46,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:06:46,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:06:46,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:06:46,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:06:46,968 INFO L87 Difference]: Start difference. First operand 15019 states and 18193 transitions. Second operand 7 states. [2020-10-28 13:06:50,344 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 13:07:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:07:03,552 INFO L93 Difference]: Finished difference Result 34811 states and 42938 transitions. [2020-10-28 13:07:03,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:07:03,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 575 [2020-10-28 13:07:03,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:07:03,628 INFO L225 Difference]: With dead ends: 34811 [2020-10-28 13:07:03,628 INFO L226 Difference]: Without dead ends: 19113 [2020-10-28 13:07:03,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:07:03,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19113 states. [2020-10-28 13:07:04,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19113 to 17562. [2020-10-28 13:07:04,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17562 states. [2020-10-28 13:07:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17562 states to 17562 states and 20576 transitions. [2020-10-28 13:07:04,193 INFO L78 Accepts]: Start accepts. Automaton has 17562 states and 20576 transitions. Word has length 575 [2020-10-28 13:07:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:07:04,194 INFO L481 AbstractCegarLoop]: Abstraction has 17562 states and 20576 transitions. [2020-10-28 13:07:04,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:07:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 17562 states and 20576 transitions. [2020-10-28 13:07:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2020-10-28 13:07:04,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:07:04,204 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:07:04,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 13:07:04,205 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:07:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:07:04,206 INFO L82 PathProgramCache]: Analyzing trace with hash -217610697, now seen corresponding path program 1 times [2020-10-28 13:07:04,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:07:04,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517576963] [2020-10-28 13:07:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:07:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:04,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:04,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:08,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:08,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 592 [2020-10-28 13:07:08,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:07:08,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4342 [2020-10-28 13:07:08,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:08,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:08,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:07:08,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:07:08,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-28 13:07:08,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:08,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:07:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:08,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:08,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:08,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:07:08,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:08,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:07:08,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:08,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:08,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:07:08,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:08,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:07:08,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:09,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:07:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:09,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:09,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:09,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:07:09,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:09,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-28 13:07:09,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:09,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:07:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:07:09,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:09,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:07:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:09,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:09,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:09,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:07:09,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:09,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-28 13:07:09,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:09,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:09,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:07:09,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:09,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:07:09,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:09,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:07:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:09,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:09,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:09,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-28 13:07:09,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:09,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-28 13:07:09,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:09,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:09,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:07:09,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:07:09,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-28 13:07:09,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 315 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 13:07:09,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517576963] [2020-10-28 13:07:09,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:07:09,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:07:09,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204884167] [2020-10-28 13:07:09,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:07:09,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:07:09,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:07:09,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:07:09,971 INFO L87 Difference]: Start difference. First operand 17562 states and 20576 transitions. Second operand 7 states. [2020-10-28 13:07:24,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:07:24,823 INFO L93 Difference]: Finished difference Result 38892 states and 46995 transitions. [2020-10-28 13:07:24,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:07:24,826 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 576 [2020-10-28 13:07:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:07:24,912 INFO L225 Difference]: With dead ends: 38892 [2020-10-28 13:07:24,912 INFO L226 Difference]: Without dead ends: 23512 [2020-10-28 13:07:24,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:07:24,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23512 states. [2020-10-28 13:07:25,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23512 to 21947. [2020-10-28 13:07:25,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21947 states. [2020-10-28 13:07:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21947 states to 21947 states and 26400 transitions. [2020-10-28 13:07:25,681 INFO L78 Accepts]: Start accepts. Automaton has 21947 states and 26400 transitions. Word has length 576 [2020-10-28 13:07:25,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:07:25,682 INFO L481 AbstractCegarLoop]: Abstraction has 21947 states and 26400 transitions. [2020-10-28 13:07:25,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:07:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 21947 states and 26400 transitions. [2020-10-28 13:07:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2020-10-28 13:07:25,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:07:25,692 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-28 13:07:25,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 13:07:25,693 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:07:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:07:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash -72085988, now seen corresponding path program 1 times [2020-10-28 13:07:25,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:07:25,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754471229] [2020-10-28 13:07:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:07:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:25,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:26,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:28,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:30,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:30,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 603 [2020-10-28 13:07:30,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:07:30,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 13:07:30,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:30,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:30,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:07:30,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 576 [2020-10-28 13:07:30,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 13:07:30,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:31,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:07:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:31,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:31,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:31,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:07:31,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:31,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:07:31,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:31,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:31,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:07:31,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:31,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:07:31,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:31,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:07:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:31,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:31,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:31,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:07:31,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:31,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-28 13:07:31,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:31,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:31,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:07:31,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:31,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:07:31,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:31,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:07:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:31,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:31,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:31,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:07:31,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:31,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 13:07:31,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:31,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:31,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:07:31,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:31,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:07:31,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:31,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:07:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:31,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:31,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:31,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-28 13:07:31,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:31,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-28 13:07:31,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:31,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:31,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:07:31,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:31,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-28 13:07:31,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2020-10-28 13:07:31,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754471229] [2020-10-28 13:07:31,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:07:31,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:07:31,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396498567] [2020-10-28 13:07:31,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:07:31,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:07:31,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:07:31,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:07:31,831 INFO L87 Difference]: Start difference. First operand 21947 states and 26400 transitions. Second operand 5 states. [2020-10-28 13:07:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:07:44,165 INFO L93 Difference]: Finished difference Result 46992 states and 57824 transitions. [2020-10-28 13:07:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:07:44,168 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 587 [2020-10-28 13:07:44,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:07:44,250 INFO L225 Difference]: With dead ends: 46992 [2020-10-28 13:07:44,250 INFO L226 Difference]: Without dead ends: 25358 [2020-10-28 13:07:44,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:07:44,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25358 states. [2020-10-28 13:07:44,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25358 to 25049. [2020-10-28 13:07:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25049 states. [2020-10-28 13:07:45,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25049 states to 25049 states and 29579 transitions. [2020-10-28 13:07:45,037 INFO L78 Accepts]: Start accepts. Automaton has 25049 states and 29579 transitions. Word has length 587 [2020-10-28 13:07:45,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:07:45,037 INFO L481 AbstractCegarLoop]: Abstraction has 25049 states and 29579 transitions. [2020-10-28 13:07:45,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:07:45,038 INFO L276 IsEmpty]: Start isEmpty. Operand 25049 states and 29579 transitions. [2020-10-28 13:07:45,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2020-10-28 13:07:45,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:07:45,058 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-28 13:07:45,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 13:07:45,059 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:07:45,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:07:45,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2138013446, now seen corresponding path program 1 times [2020-10-28 13:07:45,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:07:45,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337197871] [2020-10-28 13:07:45,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:07:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:45,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:45,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:46,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:46,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:47,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:50,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:50,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 640 [2020-10-28 13:07:50,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 13:07:50,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 13:07:50,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:50,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:50,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:07:50,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 537 [2020-10-28 13:07:50,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:07:50,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:50,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:07:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:50,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:50,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:50,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:07:50,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:50,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 13:07:50,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:50,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:50,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:07:50,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:50,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:07:50,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:50,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:07:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:50,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:50,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:50,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:07:50,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:50,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-28 13:07:50,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:50,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:50,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:07:50,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:50,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:07:50,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:50,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:07:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:50,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:50,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:50,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:07:50,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:50,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 13:07:50,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:50,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:50,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:07:50,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:50,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:07:50,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:50,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:07:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:50,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:50,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:50,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 13:07:50,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:50,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-28 13:07:50,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:50,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:50,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:07:50,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-28 13:07:50,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:07:50,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:50,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 533 [2020-10-28 13:07:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:50,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:50,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:50,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 13:07:50,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:50,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 13:07:50,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:50,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:50,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:07:50,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-28 13:07:50,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:07:50,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2020-10-28 13:07:51,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337197871] [2020-10-28 13:07:51,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:07:51,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:07:51,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564682265] [2020-10-28 13:07:51,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:07:51,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:07:51,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:07:51,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:07:51,143 INFO L87 Difference]: Start difference. First operand 25049 states and 29579 transitions. Second operand 5 states. [2020-10-28 13:07:51,288 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 65