/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=SHALLOWEST --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/Problem12_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:52:20,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:52:20,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:52:20,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:52:20,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:52:20,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:52:20,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:52:20,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:52:20,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:52:20,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:52:20,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:52:20,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:52:20,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:52:20,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:52:20,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:52:20,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:52:20,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:52:20,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:52:20,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:52:20,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:52:20,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:52:20,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:52:20,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:52:20,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:52:20,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:52:20,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:52:20,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:52:20,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:52:20,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:52:20,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:52:20,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:52:20,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:52:20,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:52:20,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:52:20,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:52:20,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:52:20,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:52:20,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:52:20,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:52:20,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:52:20,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:52:20,364 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 [2020-10-26 22:52:20,426 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:52:20,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:52:20,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:52:20,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:52:20,433 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:52:20,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:52:20,434 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:52:20,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:52:20,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:52:20,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:52:20,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:52:20,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:52:20,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:52:20,437 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:52:20,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:52:20,437 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:52:20,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:52:20,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:52:20,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:52:20,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:52:20,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:52:20,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:52:20,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:52:20,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:52:20,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:52:20,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:52:20,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:52:20,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:52:20,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:52:20,440 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:52:20,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:52:20,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:52:20,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:52:20,945 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:52:20,945 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:52:20,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label23.c [2020-10-26 22:52:21,052 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db286ca05/692b680f97e9466893f9dac6cb9f6eb9/FLAG30802eb8c [2020-10-26 22:52:22,316 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:52:22,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label23.c [2020-10-26 22:52:22,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db286ca05/692b680f97e9466893f9dac6cb9f6eb9/FLAG30802eb8c [2020-10-26 22:52:22,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db286ca05/692b680f97e9466893f9dac6cb9f6eb9 [2020-10-26 22:52:22,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:52:22,719 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:52:22,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:52:22,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:52:22,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:52:22,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:52:22" (1/1) ... [2020-10-26 22:52:22,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d463e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:22, skipping insertion in model container [2020-10-26 22:52:22,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:52:22" (1/1) ... [2020-10-26 22:52:22,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:52:22,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:52:24,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:52:24,487 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:52:25,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:52:25,394 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:52:25,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:25 WrapperNode [2020-10-26 22:52:25,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:52:25,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:52:25,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:52:25,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:52:25,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:25" (1/1) ... [2020-10-26 22:52:25,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:25" (1/1) ... [2020-10-26 22:52:25,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:25" (1/1) ... [2020-10-26 22:52:25,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:25" (1/1) ... [2020-10-26 22:52:25,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:25" (1/1) ... [2020-10-26 22:52:25,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:25" (1/1) ... [2020-10-26 22:52:25,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:25" (1/1) ... [2020-10-26 22:52:25,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:52:25,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:52:25,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:52:25,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:52:25,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:25" (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 [2020-10-26 22:52:25,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:52:25,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:52:25,884 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:52:25,884 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:52:25,884 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 22:52:25,885 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 22:52:25,885 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 22:52:25,885 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:52:25,885 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:52:25,885 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 22:52:25,887 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 22:52:25,887 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 22:52:25,887 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:52:25,887 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:52:25,887 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:52:25,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:52:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:52:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:52:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:52:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:52:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:52:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:52:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:52:25,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:52:25,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:52:31,726 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:52:31,726 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:52:31,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:52:31 BoogieIcfgContainer [2020-10-26 22:52:31,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:52:31,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:52:31,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:52:31,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:52:31,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:52:22" (1/3) ... [2020-10-26 22:52:31,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1610837e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:52:31, skipping insertion in model container [2020-10-26 22:52:31,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:25" (2/3) ... [2020-10-26 22:52:31,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1610837e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:52:31, skipping insertion in model container [2020-10-26 22:52:31,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:52:31" (3/3) ... [2020-10-26 22:52:31,741 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label23.c [2020-10-26 22:52:31,755 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:52:31,771 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:52:31,787 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:52:31,824 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:52:31,824 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:52:31,824 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:52:31,824 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:52:31,825 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:52:31,825 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:52:31,825 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:52:31,825 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:52:31,864 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-26 22:52:31,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 22:52:31,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:52:31,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:52:31,874 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:52:31,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:52:31,881 INFO L82 PathProgramCache]: Analyzing trace with hash -61379068, now seen corresponding path program 1 times [2020-10-26 22:52:31,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:52:31,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705717189] [2020-10-26 22:52:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:52:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:52:32,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:32,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:52:32,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 22:52:32,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:52:32,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-26 22:52:32,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:52:32,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:52:32,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:52:32,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 22:52:32,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:52:32,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:52:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:52:32,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:32,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:52:32,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:52:32,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:52:32,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 22:52:32,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:52:32,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:52:32,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:52:32,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:52:32,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:52:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:52:32,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705717189] [2020-10-26 22:52:32,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:52:32,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 22:52:32,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833742246] [2020-10-26 22:52:32,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 22:52:32,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:52:32,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 22:52:32,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 22:52:32,938 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 4 states. [2020-10-26 22:52:43,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:52:43,534 INFO L93 Difference]: Finished difference Result 2476 states and 4742 transitions. [2020-10-26 22:52:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:52:43,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-26 22:52:43,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:52:43,585 INFO L225 Difference]: With dead ends: 2476 [2020-10-26 22:52:43,587 INFO L226 Difference]: Without dead ends: 1569 [2020-10-26 22:52:43,606 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 [2020-10-26 22:52:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-26 22:52:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1554. [2020-10-26 22:52:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-26 22:52:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2726 transitions. [2020-10-26 22:52:43,818 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2726 transitions. Word has length 42 [2020-10-26 22:52:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:52:43,819 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2726 transitions. [2020-10-26 22:52:43,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 22:52:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2726 transitions. [2020-10-26 22:52:43,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-26 22:52:43,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:52:43,830 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:52:43,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:52:43,830 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:52:43,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:52:43,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2053883182, now seen corresponding path program 1 times [2020-10-26 22:52:43,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:52:43,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540736813] [2020-10-26 22:52:43,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:52:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:52:43,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:44,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:44,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:45,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:52:45,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 22:52:45,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:52:45,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1388 [2020-10-26 22:52:45,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:52:45,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:52:45,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:52:45,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:52:45,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:52:45,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:52:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:52:45,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:45,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:52:45,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:52:45,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:52:45,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 22:52:45,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:52:45,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:52:45,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:52:45,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:52:45,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-26 22:52:45,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:52:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:52:45,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:45,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:52:45,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 22:52:45,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:52:45,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-26 22:52:45,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:52:45,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:52:45,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:52:45,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:52:45,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:52:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:52:45,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540736813] [2020-10-26 22:52:45,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:52:45,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 22:52:45,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063885107] [2020-10-26 22:52:45,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:52:45,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:52:45,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:52:45,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:52:45,839 INFO L87 Difference]: Start difference. First operand 1554 states and 2726 transitions. Second operand 8 states. [2020-10-26 22:53:05,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:53:05,183 INFO L93 Difference]: Finished difference Result 6337 states and 11281 transitions. [2020-10-26 22:53:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 22:53:05,186 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-10-26 22:53:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:53:05,234 INFO L225 Difference]: With dead ends: 6337 [2020-10-26 22:53:05,235 INFO L226 Difference]: Without dead ends: 4789 [2020-10-26 22:53:05,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 22:53:05,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4789 states. [2020-10-26 22:53:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4789 to 4750. [2020-10-26 22:53:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4750 states. [2020-10-26 22:53:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4750 states to 4750 states and 7432 transitions. [2020-10-26 22:53:05,512 INFO L78 Accepts]: Start accepts. Automaton has 4750 states and 7432 transitions. Word has length 111 [2020-10-26 22:53:05,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:53:05,515 INFO L481 AbstractCegarLoop]: Abstraction has 4750 states and 7432 transitions. [2020-10-26 22:53:05,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:53:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4750 states and 7432 transitions. [2020-10-26 22:53:05,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 22:53:05,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:53:05,525 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:53:05,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:53:05,526 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:53:05,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:53:05,528 INFO L82 PathProgramCache]: Analyzing trace with hash 834340706, now seen corresponding path program 1 times [2020-10-26 22:53:05,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:53:05,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972086136] [2020-10-26 22:53:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:53:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:05,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:05,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:05,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 22:53:05,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:53:05,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-26 22:53:05,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:05,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:53:05,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:53:05,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 22:53:05,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 22:53:06,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:53:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:06,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:06,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:06,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:53:06,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:53:06,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:53:06,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:06,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:53:06,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:53:06,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:53:06,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:06,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:53:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:06,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:06,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:06,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:53:06,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:53:06,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 22:53:06,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:06,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:53:06,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:53:06,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:53:06,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:53:06,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972086136] [2020-10-26 22:53:06,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:53:06,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:53:06,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324736061] [2020-10-26 22:53:06,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:53:06,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:53:06,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:53:06,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:53:06,387 INFO L87 Difference]: Start difference. First operand 4750 states and 7432 transitions. Second operand 5 states. [2020-10-26 22:53:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:53:19,032 INFO L93 Difference]: Finished difference Result 9525 states and 14942 transitions. [2020-10-26 22:53:19,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:53:19,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-10-26 22:53:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:53:19,067 INFO L225 Difference]: With dead ends: 9525 [2020-10-26 22:53:19,068 INFO L226 Difference]: Without dead ends: 4781 [2020-10-26 22:53:19,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:53:19,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4781 states. [2020-10-26 22:53:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4781 to 4750. [2020-10-26 22:53:19,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4750 states. [2020-10-26 22:53:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4750 states to 4750 states and 6972 transitions. [2020-10-26 22:53:19,305 INFO L78 Accepts]: Start accepts. Automaton has 4750 states and 6972 transitions. Word has length 117 [2020-10-26 22:53:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:53:19,309 INFO L481 AbstractCegarLoop]: Abstraction has 4750 states and 6972 transitions. [2020-10-26 22:53:19,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:53:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4750 states and 6972 transitions. [2020-10-26 22:53:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-26 22:53:19,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:53:19,321 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:53:19,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:53:19,321 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:53:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:53:19,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1618047768, now seen corresponding path program 1 times [2020-10-26 22:53:19,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:53:19,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653465438] [2020-10-26 22:53:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:53:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:19,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:19,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:20,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:20,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:20,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:53:20,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:53:20,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1473 [2020-10-26 22:53:20,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:20,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:53:20,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:53:20,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-26 22:53:20,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:21,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:53:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:21,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:21,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:21,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:53:21,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:53:21,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 22:53:21,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:21,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:53:21,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:53:21,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:53:21,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:21,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:53:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:21,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:21,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:21,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:21,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 22:53:21,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:53:21,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-26 22:53:21,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:21,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:53:21,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:53:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 22:53:21,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:53:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 22:53:21,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653465438] [2020-10-26 22:53:21,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:53:21,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:53:21,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603036350] [2020-10-26 22:53:21,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:53:21,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:53:21,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:53:21,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:53:21,561 INFO L87 Difference]: Start difference. First operand 4750 states and 6972 transitions. Second operand 7 states. [2020-10-26 22:53:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:53:36,322 INFO L93 Difference]: Finished difference Result 14680 states and 22363 transitions. [2020-10-26 22:53:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:53:36,324 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 136 [2020-10-26 22:53:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:53:36,373 INFO L225 Difference]: With dead ends: 14680 [2020-10-26 22:53:36,373 INFO L226 Difference]: Without dead ends: 9936 [2020-10-26 22:53:36,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:53:36,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9936 states. [2020-10-26 22:53:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9936 to 9725. [2020-10-26 22:53:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9725 states. [2020-10-26 22:53:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9725 states to 9725 states and 13031 transitions. [2020-10-26 22:53:36,709 INFO L78 Accepts]: Start accepts. Automaton has 9725 states and 13031 transitions. Word has length 136 [2020-10-26 22:53:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:53:36,710 INFO L481 AbstractCegarLoop]: Abstraction has 9725 states and 13031 transitions. [2020-10-26 22:53:36,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:53:36,710 INFO L276 IsEmpty]: Start isEmpty. Operand 9725 states and 13031 transitions. [2020-10-26 22:53:36,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-26 22:53:36,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:53:36,713 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:53:36,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:53:36,714 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:53:36,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:53:36,714 INFO L82 PathProgramCache]: Analyzing trace with hash 328659370, now seen corresponding path program 1 times [2020-10-26 22:53:36,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:53:36,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760495992] [2020-10-26 22:53:36,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:53:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:36,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:37,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:37,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:37,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-26 22:53:37,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:53:37,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1154 [2020-10-26 22:53:37,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:37,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:53:37,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:53:37,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-26 22:53:37,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:38,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:53:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:38,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:38,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:38,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:53:38,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:53:38,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 22:53:38,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:38,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:53:38,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:53:38,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:53:38,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:38,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:53:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:38,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:38,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:38,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 22:53:38,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:53:38,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-26 22:53:38,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:38,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:53:38,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:53:38,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 22:53:38,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:53:38,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760495992] [2020-10-26 22:53:38,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:53:38,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:53:38,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703112130] [2020-10-26 22:53:38,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:53:38,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:53:38,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:53:38,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:53:38,412 INFO L87 Difference]: Start difference. First operand 9725 states and 13031 transitions. Second operand 7 states. [2020-10-26 22:53:55,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:53:55,611 INFO L93 Difference]: Finished difference Result 29719 states and 42153 transitions. [2020-10-26 22:53:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:53:55,616 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 145 [2020-10-26 22:53:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:53:55,706 INFO L225 Difference]: With dead ends: 29719 [2020-10-26 22:53:55,707 INFO L226 Difference]: Without dead ends: 20000 [2020-10-26 22:53:55,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:53:55,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20000 states. [2020-10-26 22:53:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20000 to 18935. [2020-10-26 22:53:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18935 states. [2020-10-26 22:53:56,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18935 states to 18935 states and 24603 transitions. [2020-10-26 22:53:56,346 INFO L78 Accepts]: Start accepts. Automaton has 18935 states and 24603 transitions. Word has length 145 [2020-10-26 22:53:56,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:53:56,346 INFO L481 AbstractCegarLoop]: Abstraction has 18935 states and 24603 transitions. [2020-10-26 22:53:56,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:53:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand 18935 states and 24603 transitions. [2020-10-26 22:53:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-26 22:53:56,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:53:56,351 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:53:56,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:53:56,351 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:53:56,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:53:56,352 INFO L82 PathProgramCache]: Analyzing trace with hash -49190920, now seen corresponding path program 1 times [2020-10-26 22:53:56,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:53:56,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833422479] [2020-10-26 22:53:56,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:53:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:56,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:56,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:56,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:57,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:58,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:58,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-26 22:53:58,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:53:58,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2171 [2020-10-26 22:53:58,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:58,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:53:58,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:53:58,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-10-26 22:53:58,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:58,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:53:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:58,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:58,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:58,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:53:58,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:53:58,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 22:53:58,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:58,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:53:58,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:53:58,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:53:58,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:58,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:53:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:58,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:58,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:58,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:53:58,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:53:58,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-26 22:53:58,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:58,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:53:58,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:53:58,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:53:58,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:58,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 22:53:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:58,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:59,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:59,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 22:53:59,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:53:59,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-26 22:53:59,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:59,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:53:59,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:53:59,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 22:53:59,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-26 22:53:59,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833422479] [2020-10-26 22:53:59,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:53:59,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:53:59,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372794556] [2020-10-26 22:53:59,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:53:59,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:53:59,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:53:59,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:53:59,154 INFO L87 Difference]: Start difference. First operand 18935 states and 24603 transitions. Second operand 7 states. [2020-10-26 22:54:17,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:54:17,561 INFO L93 Difference]: Finished difference Result 55476 states and 75991 transitions. [2020-10-26 22:54:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:54:17,563 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 198 [2020-10-26 22:54:17,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:54:17,737 INFO L225 Difference]: With dead ends: 55476 [2020-10-26 22:54:17,737 INFO L226 Difference]: Without dead ends: 36547 [2020-10-26 22:54:17,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:54:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36547 states. [2020-10-26 22:54:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36547 to 33100. [2020-10-26 22:54:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33100 states. [2020-10-26 22:54:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33100 states to 33100 states and 42404 transitions. [2020-10-26 22:54:18,947 INFO L78 Accepts]: Start accepts. Automaton has 33100 states and 42404 transitions. Word has length 198 [2020-10-26 22:54:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:54:18,948 INFO L481 AbstractCegarLoop]: Abstraction has 33100 states and 42404 transitions. [2020-10-26 22:54:18,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:54:18,948 INFO L276 IsEmpty]: Start isEmpty. Operand 33100 states and 42404 transitions. [2020-10-26 22:54:18,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-26 22:54:18,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:54:18,953 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:54:18,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:54:18,954 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:54:18,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:54:18,956 INFO L82 PathProgramCache]: Analyzing trace with hash -893277154, now seen corresponding path program 1 times [2020-10-26 22:54:18,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:54:18,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318249518] [2020-10-26 22:54:18,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:54:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:19,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:19,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:19,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:20,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:20,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-26 22:54:20,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:54:20,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1888 [2020-10-26 22:54:20,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:20,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:54:20,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:54:20,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 22:54:20,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:21,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:54:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:21,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:21,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:21,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:54:21,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:21,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:54:21,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:21,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:54:21,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:54:21,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:54:21,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:54:21,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:54:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:21,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:21,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:21,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:54:21,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:21,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 22:54:21,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:21,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:54:21,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:54:21,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:54:21,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:21,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 22:54:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:21,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:21,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:21,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:21,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 22:54:21,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:54:21,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-26 22:54:21,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:21,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:54:21,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:54:21,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-26 22:54:21,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:54:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:54:21,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318249518] [2020-10-26 22:54:21,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:54:21,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:54:21,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136871882] [2020-10-26 22:54:21,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:54:21,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:54:21,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:54:21,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:54:21,932 INFO L87 Difference]: Start difference. First operand 33100 states and 42404 transitions. Second operand 7 states. [2020-10-26 22:54:22,611 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-26 22:54:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:54:34,500 INFO L93 Difference]: Finished difference Result 67638 states and 96151 transitions. [2020-10-26 22:54:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:54:34,502 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 231 [2020-10-26 22:54:34,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:54:34,777 INFO L225 Difference]: With dead ends: 67638 [2020-10-26 22:54:34,777 INFO L226 Difference]: Without dead ends: 33859 [2020-10-26 22:54:34,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:54:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33859 states. [2020-10-26 22:54:36,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33859 to 32990. [2020-10-26 22:54:36,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32990 states. [2020-10-26 22:54:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32990 states to 32990 states and 40961 transitions. [2020-10-26 22:54:36,140 INFO L78 Accepts]: Start accepts. Automaton has 32990 states and 40961 transitions. Word has length 231 [2020-10-26 22:54:36,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:54:36,141 INFO L481 AbstractCegarLoop]: Abstraction has 32990 states and 40961 transitions. [2020-10-26 22:54:36,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:54:36,141 INFO L276 IsEmpty]: Start isEmpty. Operand 32990 states and 40961 transitions. [2020-10-26 22:54:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-10-26 22:54:36,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:54:36,148 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-26 22:54:36,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:54:36,148 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:54:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:54:36,149 INFO L82 PathProgramCache]: Analyzing trace with hash 448298584, now seen corresponding path program 1 times [2020-10-26 22:54:36,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:54:36,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957675457] [2020-10-26 22:54:36,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:54:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:36,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:37,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:37,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 304 [2020-10-26 22:54:37,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:37,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 638 [2020-10-26 22:54:37,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:37,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:54:37,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 260 [2020-10-26 22:54:37,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 22:54:37,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:37,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:54:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:37,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:37,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:37,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:54:37,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:37,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:54:37,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:37,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:54:37,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:54:37,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:54:37,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:37,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:54:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:37,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:37,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:37,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:54:37,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:37,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 22:54:37,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:54:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:54:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:54:37,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:37,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:54:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:37,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:37,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:37,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 22:54:37,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:37,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-26 22:54:37,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:37,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:54:37,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:54:37,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 22:54:37,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:54:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 22:54:37,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957675457] [2020-10-26 22:54:37,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:54:37,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:54:37,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695811287] [2020-10-26 22:54:37,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:54:37,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:54:37,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:54:37,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:54:37,683 INFO L87 Difference]: Start difference. First operand 32990 states and 40961 transitions. Second operand 5 states. [2020-10-26 22:54:53,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:54:53,214 INFO L93 Difference]: Finished difference Result 82342 states and 105969 transitions. [2020-10-26 22:54:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:54:53,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 290 [2020-10-26 22:54:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:54:53,375 INFO L225 Difference]: With dead ends: 82342 [2020-10-26 22:54:53,375 INFO L226 Difference]: Without dead ends: 49358 [2020-10-26 22:54:53,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:54:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49358 states. [2020-10-26 22:54:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49358 to 49308. [2020-10-26 22:54:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49308 states. [2020-10-26 22:54:55,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49308 states to 49308 states and 59879 transitions. [2020-10-26 22:54:55,146 INFO L78 Accepts]: Start accepts. Automaton has 49308 states and 59879 transitions. Word has length 290 [2020-10-26 22:54:55,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:54:55,146 INFO L481 AbstractCegarLoop]: Abstraction has 49308 states and 59879 transitions. [2020-10-26 22:54:55,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:54:55,147 INFO L276 IsEmpty]: Start isEmpty. Operand 49308 states and 59879 transitions. [2020-10-26 22:54:55,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-10-26 22:54:55,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:54:55,156 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:54:55,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:54:55,156 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:54:55,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:54:55,157 INFO L82 PathProgramCache]: Analyzing trace with hash -827692892, now seen corresponding path program 1 times [2020-10-26 22:54:55,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:54:55,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996509523] [2020-10-26 22:54:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:54:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:55,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:55,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:57,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:00,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:00,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-26 22:55:00,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:55:00,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4823 [2020-10-26 22:55:00,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:00,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:55:00,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:55:00,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-26 22:55:00,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:00,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:55:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:00,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:00,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:00,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:55:00,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:00,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 22:55:00,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:00,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:55:00,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:00,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:55:00,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:00,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:55:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:00,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:00,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:00,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 22:55:00,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:00,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-26 22:55:00,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:00,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:55:00,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:55:00,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 22:55:00,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:00,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-10-26 22:55:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:01,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:01,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:01,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-26 22:55:01,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:01,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-26 22:55:01,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:01,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:55:01,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 122 [2020-10-26 22:55:01,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:55:01,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 68 proven. 119 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:55:01,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996509523] [2020-10-26 22:55:01,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:55:01,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:55:01,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000247747] [2020-10-26 22:55:01,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:55:01,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:55:01,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:55:01,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:55:01,393 INFO L87 Difference]: Start difference. First operand 49308 states and 59879 transitions. Second operand 7 states. [2020-10-26 22:55:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:55:16,512 INFO L93 Difference]: Finished difference Result 100480 states and 122072 transitions. [2020-10-26 22:55:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:55:16,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 314 [2020-10-26 22:55:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:55:16,677 INFO L225 Difference]: With dead ends: 100480 [2020-10-26 22:55:16,678 INFO L226 Difference]: Without dead ends: 50398 [2020-10-26 22:55:16,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:55:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50398 states. [2020-10-26 22:55:18,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50398 to 50311. [2020-10-26 22:55:18,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50311 states. [2020-10-26 22:55:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50311 states to 50311 states and 61010 transitions. [2020-10-26 22:55:18,155 INFO L78 Accepts]: Start accepts. Automaton has 50311 states and 61010 transitions. Word has length 314 [2020-10-26 22:55:18,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:55:18,156 INFO L481 AbstractCegarLoop]: Abstraction has 50311 states and 61010 transitions. [2020-10-26 22:55:18,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:55:18,156 INFO L276 IsEmpty]: Start isEmpty. Operand 50311 states and 61010 transitions. [2020-10-26 22:55:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2020-10-26 22:55:18,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:55:18,164 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:55:18,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:55:18,165 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:55:18,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:55:18,166 INFO L82 PathProgramCache]: Analyzing trace with hash 240785052, now seen corresponding path program 1 times [2020-10-26 22:55:18,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:55:18,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342677051] [2020-10-26 22:55:18,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:55:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:18,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:18,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:19,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:22,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:22,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-10-26 22:55:22,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:55:22,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4164 [2020-10-26 22:55:22,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:22,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:55:22,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-26 22:55:22,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-10-26 22:55:22,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:22,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:55:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:22,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:22,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:22,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:55:22,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:22,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:55:22,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:22,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:55:22,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:22,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:55:22,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:22,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:55:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:22,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:22,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:22,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:55:22,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:22,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-26 22:55:22,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:22,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:55:22,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:22,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 22:55:22,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:22,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:55:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:22,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:22,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:23,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:23,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:55:23,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:55:23,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-26 22:55:23,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:23,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:55:23,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:55:23,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:55:23,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:23,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-10-26 22:55:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:23,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:23,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:23,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-26 22:55:23,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:23,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-26 22:55:23,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:23,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:55:23,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:55:23,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:55:23,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 391 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 22:55:23,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342677051] [2020-10-26 22:55:23,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:55:23,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 22:55:23,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046690851] [2020-10-26 22:55:23,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 22:55:23,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:55:23,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 22:55:23,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-26 22:55:23,710 INFO L87 Difference]: Start difference. First operand 50311 states and 61010 transitions. Second operand 9 states. [2020-10-26 22:55:48,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:55:48,812 INFO L93 Difference]: Finished difference Result 114860 states and 143023 transitions. [2020-10-26 22:55:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 22:55:48,814 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 400 [2020-10-26 22:55:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:55:48,963 INFO L225 Difference]: With dead ends: 114860 [2020-10-26 22:55:48,963 INFO L226 Difference]: Without dead ends: 64555 [2020-10-26 22:55:49,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2020-10-26 22:55:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64555 states. [2020-10-26 22:55:50,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64555 to 64389. [2020-10-26 22:55:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64389 states. [2020-10-26 22:55:50,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64389 states to 64389 states and 79029 transitions. [2020-10-26 22:55:50,509 INFO L78 Accepts]: Start accepts. Automaton has 64389 states and 79029 transitions. Word has length 400 [2020-10-26 22:55:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:55:50,509 INFO L481 AbstractCegarLoop]: Abstraction has 64389 states and 79029 transitions. [2020-10-26 22:55:50,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 22:55:50,510 INFO L276 IsEmpty]: Start isEmpty. Operand 64389 states and 79029 transitions. [2020-10-26 22:55:50,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-10-26 22:55:50,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:55:50,521 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-26 22:55:50,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 22:55:50,521 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:55:50,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:55:50,522 INFO L82 PathProgramCache]: Analyzing trace with hash -942981086, now seen corresponding path program 1 times [2020-10-26 22:55:50,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:55:50,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666513350] [2020-10-26 22:55:50,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:55:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:50,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:50,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:51,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:53,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:55,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:55,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 439 [2020-10-26 22:55:55,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:55:55,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 22:55:55,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:55,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:55:55,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:55:55,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 22:55:55,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:55,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:55:55,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:55,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:55,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:55,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:55:55,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:55,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:55:55,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:55,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:55:55,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:55,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:55:55,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:55,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:55:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:55,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:56,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:56,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:55:56,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:56,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-26 22:55:56,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:55:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:55:56,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:56,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:55:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:56,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:56,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:56,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:55:56,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:56,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-26 22:55:56,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:56,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:55:56,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:55:56,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:55:56,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:56,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-10-26 22:55:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:56,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:56,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:56,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 22:55:56,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:56,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 22:55:56,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:56,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:55:56,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 141 [2020-10-26 22:55:56,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:55:56,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 192 proven. 88 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-10-26 22:55:56,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666513350] [2020-10-26 22:55:56,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:55:56,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:55:56,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537558524] [2020-10-26 22:55:56,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:55:56,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:55:56,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:55:56,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:55:56,575 INFO L87 Difference]: Start difference. First operand 64389 states and 79029 transitions. Second operand 7 states.