/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/Problem13_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:14:31,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:14:31,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:14:31,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:14:31,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:14:31,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:14:31,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:14:31,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:14:31,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:14:31,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:14:31,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:14:31,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:14:31,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:14:31,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:14:31,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:14:31,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:14:31,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:14:31,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:14:31,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:14:31,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:14:31,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:14:31,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:14:31,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:14:31,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:14:31,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:14:31,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:14:31,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:14:31,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:14:31,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:14:31,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:14:31,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:14:31,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:14:31,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:14:31,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:14:31,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:14:31,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:14:31,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:14:31,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:14:31,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:14:31,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:14:31,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:14:31,318 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 23:14:31,371 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:14:31,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:14:31,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:14:31,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:14:31,379 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:14:31,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:14:31,380 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:14:31,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:14:31,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:14:31,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:14:31,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:14:31,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:14:31,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:14:31,383 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:14:31,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:14:31,383 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:14:31,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:14:31,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:14:31,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:14:31,384 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:14:31,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:14:31,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:14:31,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:14:31,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:14:31,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:14:31,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:14:31,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:14:31,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:14:31,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:14:31,386 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:14:31,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:14:31,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:14:31,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:14:31,872 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:14:31,873 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:14:31,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label43.c [2020-10-26 23:14:31,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbb0ad221/956bbd6610a24e80bf1a8a232469ffe0/FLAG3c134a94a [2020-10-26 23:14:33,083 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:14:33,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label43.c [2020-10-26 23:14:33,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbb0ad221/956bbd6610a24e80bf1a8a232469ffe0/FLAG3c134a94a [2020-10-26 23:14:33,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbb0ad221/956bbd6610a24e80bf1a8a232469ffe0 [2020-10-26 23:14:33,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:14:33,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:14:33,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:14:33,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:14:33,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:14:33,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:14:33" (1/1) ... [2020-10-26 23:14:33,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447682be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:14:33, skipping insertion in model container [2020-10-26 23:14:33,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:14:33" (1/1) ... [2020-10-26 23:14:33,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:14:33,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:14:35,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:14:35,521 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:14:36,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:14:36,295 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:14:36,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:14:36 WrapperNode [2020-10-26 23:14:36,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:14:36,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:14:36,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:14:36,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:14:36,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:14:36" (1/1) ... [2020-10-26 23:14:36,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:14:36" (1/1) ... [2020-10-26 23:14:36,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:14:36" (1/1) ... [2020-10-26 23:14:36,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:14:36" (1/1) ... [2020-10-26 23:14:36,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:14:36" (1/1) ... [2020-10-26 23:14:36,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:14:36" (1/1) ... [2020-10-26 23:14:36,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:14:36" (1/1) ... [2020-10-26 23:14:36,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:14:36,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:14:36,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:14:36,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:14:36,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:14:36" (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 23:14:36,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:14:36,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:14:36,877 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:14:36,877 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:14:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:14:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:14:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:14:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:14:36,878 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:14:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:14:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:14:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:14:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:14:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:14:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:14:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:14:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:14:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:14:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:14:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:14:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:14:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:14:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:14:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:14:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:14:47,675 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:14:47,676 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:14:47,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:14:47 BoogieIcfgContainer [2020-10-26 23:14:47,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:14:47,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:14:47,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:14:47,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:14:47,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:14:33" (1/3) ... [2020-10-26 23:14:47,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@976011b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:14:47, skipping insertion in model container [2020-10-26 23:14:47,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:14:36" (2/3) ... [2020-10-26 23:14:47,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@976011b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:14:47, skipping insertion in model container [2020-10-26 23:14:47,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:14:47" (3/3) ... [2020-10-26 23:14:47,692 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label43.c [2020-10-26 23:14:47,707 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:14:47,714 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:14:47,731 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:14:47,772 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:14:47,772 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:14:47,772 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:14:47,773 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:14:47,773 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:14:47,773 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:14:47,773 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:14:47,773 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:14:47,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:14:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 23:14:47,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:14:47,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:14:47,827 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:14:47,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:14:47,835 INFO L82 PathProgramCache]: Analyzing trace with hash -712398662, now seen corresponding path program 1 times [2020-10-26 23:14:47,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:14:47,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400735729] [2020-10-26 23:14:47,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:14:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:48,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:48,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:48,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 23:14:48,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:48,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-26 23:14:48,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:48,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:14:48,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:14:48,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 23:14:48,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:14:48,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:14:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:48,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:48,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:48,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:14:48,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:48,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 23:14:48,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:48,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:14:48,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:14:48,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:14:48,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:48,912 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 23:14:48,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400735729] [2020-10-26 23:14:48,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:14:48,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:14:48,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334112046] [2020-10-26 23:14:48,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:14:48,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:14:48,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:14:48,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:14:48,945 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:15:07,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:15:07,427 INFO L93 Difference]: Finished difference Result 3248 states and 5954 transitions. [2020-10-26 23:15:07,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:15:07,430 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-26 23:15:07,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:15:07,472 INFO L225 Difference]: With dead ends: 3248 [2020-10-26 23:15:07,472 INFO L226 Difference]: Without dead ends: 2046 [2020-10-26 23:15:07,486 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 23:15:07,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2020-10-26 23:15:07,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1989. [2020-10-26 23:15:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1989 states. [2020-10-26 23:15:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 3534 transitions. [2020-10-26 23:15:07,707 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 3534 transitions. Word has length 25 [2020-10-26 23:15:07,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:15:07,708 INFO L481 AbstractCegarLoop]: Abstraction has 1989 states and 3534 transitions. [2020-10-26 23:15:07,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:15:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 3534 transitions. [2020-10-26 23:15:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 23:15:07,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:15:07,713 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:15:07,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:15:07,714 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:15:07,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:15:07,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1852529461, now seen corresponding path program 1 times [2020-10-26 23:15:07,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:15:07,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729410973] [2020-10-26 23:15:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:15:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:07,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:08,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:08,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:09,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:09,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 23:15:09,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:15:09,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1700 [2020-10-26 23:15:09,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:09,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:15:09,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:15:09,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:15:09,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:15:09,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:15:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:09,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:09,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:09,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:15:09,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:09,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 23:15:09,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:09,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:15:09,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:15:09,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:15:09,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:09,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:15:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:09,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:09,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:09,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:15:09,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:09,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-26 23:15:09,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:09,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:15:09,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:15:09,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:15:09,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:15:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:15:10,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729410973] [2020-10-26 23:15:10,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:15:10,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:15:10,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035307189] [2020-10-26 23:15:10,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:15:10,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:15:10,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:15:10,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:15:10,049 INFO L87 Difference]: Start difference. First operand 1989 states and 3534 transitions. Second operand 7 states. [2020-10-26 23:15:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:15:35,271 INFO L93 Difference]: Finished difference Result 5896 states and 10565 transitions. [2020-10-26 23:15:35,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:15:35,272 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-26 23:15:35,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:15:35,296 INFO L225 Difference]: With dead ends: 5896 [2020-10-26 23:15:35,297 INFO L226 Difference]: Without dead ends: 3913 [2020-10-26 23:15:35,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:15:35,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3913 states. [2020-10-26 23:15:35,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3913 to 3822. [2020-10-26 23:15:35,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3822 states. [2020-10-26 23:15:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3822 states to 3822 states and 6195 transitions. [2020-10-26 23:15:35,494 INFO L78 Accepts]: Start accepts. Automaton has 3822 states and 6195 transitions. Word has length 94 [2020-10-26 23:15:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:15:35,495 INFO L481 AbstractCegarLoop]: Abstraction has 3822 states and 6195 transitions. [2020-10-26 23:15:35,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:15:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3822 states and 6195 transitions. [2020-10-26 23:15:35,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-26 23:15:35,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:15:35,498 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:15:35,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:15:35,498 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:15:35,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:15:35,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1196248097, now seen corresponding path program 1 times [2020-10-26 23:15:35,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:15:35,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114284074] [2020-10-26 23:15:35,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:15:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:35,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:35,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:36,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:36,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:15:36,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:15:36,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-10-26 23:15:36,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:36,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:15:36,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:15:36,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:15:36,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:36,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:15:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:36,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:36,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:36,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:15:36,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:36,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:15:36,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:36,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:15:36,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:15:36,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:15:36,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:36,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:15:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:36,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:36,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:36,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:15:36,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:36,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-26 23:15:36,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:36,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:15:36,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:15:36,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:15:36,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:15:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:15:36,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114284074] [2020-10-26 23:15:36,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:15:36,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:15:36,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489961177] [2020-10-26 23:15:36,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:15:36,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:15:36,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:15:36,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:15:36,939 INFO L87 Difference]: Start difference. First operand 3822 states and 6195 transitions. Second operand 7 states. [2020-10-26 23:15:38,729 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:16:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:16:05,885 INFO L93 Difference]: Finished difference Result 11232 states and 18463 transitions. [2020-10-26 23:16:05,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:16:05,891 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2020-10-26 23:16:05,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:16:05,932 INFO L225 Difference]: With dead ends: 11232 [2020-10-26 23:16:05,932 INFO L226 Difference]: Without dead ends: 7416 [2020-10-26 23:16:05,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:16:05,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7416 states. [2020-10-26 23:16:06,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7416 to 7240. [2020-10-26 23:16:06,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7240 states. [2020-10-26 23:16:06,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7240 states to 7240 states and 10277 transitions. [2020-10-26 23:16:06,161 INFO L78 Accepts]: Start accepts. Automaton has 7240 states and 10277 transitions. Word has length 100 [2020-10-26 23:16:06,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:16:06,162 INFO L481 AbstractCegarLoop]: Abstraction has 7240 states and 10277 transitions. [2020-10-26 23:16:06,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:16:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 7240 states and 10277 transitions. [2020-10-26 23:16:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 23:16:06,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:16:06,165 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:16:06,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:16:06,166 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:16:06,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:16:06,166 INFO L82 PathProgramCache]: Analyzing trace with hash 400104637, now seen corresponding path program 1 times [2020-10-26 23:16:06,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:16:06,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795022192] [2020-10-26 23:16:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:16:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:06,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:06,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:07,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:07,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-26 23:16:07,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:16:07,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-10-26 23:16:07,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:16:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:16:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 23:16:07,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:07,420 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:16:07,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:16:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:07,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:07,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:07,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:16:07,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:07,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:16:07,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:07,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:16:07,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:16:07,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:16:07,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:07,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:16:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:07,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:07,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:07,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 23:16:07,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:07,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-26 23:16:07,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:16:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:16:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:16:07,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:16:07,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795022192] [2020-10-26 23:16:07,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:16:07,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:16:07,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746733010] [2020-10-26 23:16:07,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:16:07,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:16:07,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:16:07,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:16:07,855 INFO L87 Difference]: Start difference. First operand 7240 states and 10277 transitions. Second operand 7 states. [2020-10-26 23:16:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:16:30,384 INFO L93 Difference]: Finished difference Result 15790 states and 22278 transitions. [2020-10-26 23:16:30,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:16:30,385 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 130 [2020-10-26 23:16:30,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:16:30,428 INFO L225 Difference]: With dead ends: 15790 [2020-10-26 23:16:30,429 INFO L226 Difference]: Without dead ends: 8556 [2020-10-26 23:16:30,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:16:30,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2020-10-26 23:16:30,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 8177. [2020-10-26 23:16:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8177 states. [2020-10-26 23:16:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8177 states to 8177 states and 11392 transitions. [2020-10-26 23:16:30,708 INFO L78 Accepts]: Start accepts. Automaton has 8177 states and 11392 transitions. Word has length 130 [2020-10-26 23:16:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:16:30,710 INFO L481 AbstractCegarLoop]: Abstraction has 8177 states and 11392 transitions. [2020-10-26 23:16:30,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:16:30,711 INFO L276 IsEmpty]: Start isEmpty. Operand 8177 states and 11392 transitions. [2020-10-26 23:16:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-26 23:16:30,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:16:30,717 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:16:30,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:16:30,717 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:16:30,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:16:30,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1951949455, now seen corresponding path program 1 times [2020-10-26 23:16:30,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:16:30,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649281098] [2020-10-26 23:16:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:16:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:30,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:30,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:32,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:32,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 23:16:32,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:16:32,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1669 [2020-10-26 23:16:32,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:32,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:16:32,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:16:32,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 23:16:32,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:32,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:16:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:32,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:32,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:32,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:16:32,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:32,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 23:16:32,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:32,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:16:32,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:16:32,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:16:32,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:32,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:16:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:32,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:32,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:32,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 23:16:32,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:32,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-26 23:16:32,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:32,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:16:32,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:16:32,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 23:16:32,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:16:33,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649281098] [2020-10-26 23:16:33,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:16:33,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:16:33,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377548881] [2020-10-26 23:16:33,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:16:33,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:16:33,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:16:33,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:16:33,054 INFO L87 Difference]: Start difference. First operand 8177 states and 11392 transitions. Second operand 7 states. [2020-10-26 23:16:59,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:16:59,486 INFO L93 Difference]: Finished difference Result 16701 states and 23296 transitions. [2020-10-26 23:16:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:16:59,488 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2020-10-26 23:16:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:16:59,539 INFO L225 Difference]: With dead ends: 16701 [2020-10-26 23:16:59,539 INFO L226 Difference]: Without dead ends: 8530 [2020-10-26 23:16:59,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:16:59,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8530 states. [2020-10-26 23:16:59,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8530 to 8155. [2020-10-26 23:16:59,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8155 states. [2020-10-26 23:16:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8155 states to 8155 states and 11290 transitions. [2020-10-26 23:16:59,847 INFO L78 Accepts]: Start accepts. Automaton has 8155 states and 11290 transitions. Word has length 140 [2020-10-26 23:16:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:16:59,847 INFO L481 AbstractCegarLoop]: Abstraction has 8155 states and 11290 transitions. [2020-10-26 23:16:59,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:16:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 8155 states and 11290 transitions. [2020-10-26 23:16:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-26 23:16:59,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:16:59,850 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:16:59,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:16:59,850 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:16:59,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:16:59,851 INFO L82 PathProgramCache]: Analyzing trace with hash -137083660, now seen corresponding path program 1 times [2020-10-26 23:16:59,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:16:59,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207338797] [2020-10-26 23:16:59,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:16:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:59,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:00,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:00,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:00,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-26 23:17:00,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:17:00,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-10-26 23:17:00,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:17:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:17:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-26 23:17:00,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:00,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:17:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:00,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:00,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:00,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:17:00,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:00,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 23:17:00,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:00,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:17:00,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:17:00,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:17:00,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:00,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:17:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:00,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:01,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:01,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:01,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:17:01,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:17:01,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-26 23:17:01,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:01,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:17:01,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:17:01,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:17:01,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:17:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:17:01,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207338797] [2020-10-26 23:17:01,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:17:01,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:17:01,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707343222] [2020-10-26 23:17:01,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:17:01,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:17:01,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:17:01,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:17:01,572 INFO L87 Difference]: Start difference. First operand 8155 states and 11290 transitions. Second operand 6 states. [2020-10-26 23:17:23,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:17:23,570 INFO L93 Difference]: Finished difference Result 20874 states and 30607 transitions. [2020-10-26 23:17:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 23:17:23,573 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 154 [2020-10-26 23:17:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:17:23,622 INFO L225 Difference]: With dead ends: 20874 [2020-10-26 23:17:23,622 INFO L226 Difference]: Without dead ends: 13528 [2020-10-26 23:17:23,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:17:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13528 states. [2020-10-26 23:17:23,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13528 to 13410. [2020-10-26 23:17:23,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13410 states. [2020-10-26 23:17:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13410 states to 13410 states and 17789 transitions. [2020-10-26 23:17:24,025 INFO L78 Accepts]: Start accepts. Automaton has 13410 states and 17789 transitions. Word has length 154 [2020-10-26 23:17:24,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:17:24,026 INFO L481 AbstractCegarLoop]: Abstraction has 13410 states and 17789 transitions. [2020-10-26 23:17:24,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:17:24,026 INFO L276 IsEmpty]: Start isEmpty. Operand 13410 states and 17789 transitions. [2020-10-26 23:17:24,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-26 23:17:24,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:17:24,031 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:17:24,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:17:24,031 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:17:24,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:17:24,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1906079866, now seen corresponding path program 1 times [2020-10-26 23:17:24,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:17:24,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7165246] [2020-10-26 23:17:24,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:17:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:24,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:24,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:24,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:25,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:27,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:27,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-26 23:17:27,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:17:27,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3690 [2020-10-26 23:17:27,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:27,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:17:27,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:17:27,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-10-26 23:17:27,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:27,958 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:17:27,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:17:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:27,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:27,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:27,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:17:27,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:27,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:17:27,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:27,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:17:27,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:17:27,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:17:27,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:28,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:17:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:28,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:28,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:28,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:28,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:17:28,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:17:28,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-10-26 23:17:28,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:28,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:17:28,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:17:28,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:17:28,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:17:28,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:17:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:28,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:28,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:28,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 23:17:28,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:28,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-26 23:17:28,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:28,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:17:28,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:17:28,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 23:17:28,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:17:29,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7165246] [2020-10-26 23:17:29,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:17:29,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:17:29,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175074502] [2020-10-26 23:17:29,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:17:29,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:17:29,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:17:29,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:17:29,051 INFO L87 Difference]: Start difference. First operand 13410 states and 17789 transitions. Second operand 8 states. [2020-10-26 23:17:29,224 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:18:02,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:18:02,273 INFO L93 Difference]: Finished difference Result 36258 states and 52004 transitions. [2020-10-26 23:18:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:18:02,277 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 230 [2020-10-26 23:18:02,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:18:02,374 INFO L225 Difference]: With dead ends: 36258 [2020-10-26 23:18:02,374 INFO L226 Difference]: Without dead ends: 23657 [2020-10-26 23:18:02,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:18:02,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23657 states. [2020-10-26 23:18:02,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23657 to 23251. [2020-10-26 23:18:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23251 states. [2020-10-26 23:18:03,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23251 states to 23251 states and 30449 transitions. [2020-10-26 23:18:03,162 INFO L78 Accepts]: Start accepts. Automaton has 23251 states and 30449 transitions. Word has length 230 [2020-10-26 23:18:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:18:03,162 INFO L481 AbstractCegarLoop]: Abstraction has 23251 states and 30449 transitions. [2020-10-26 23:18:03,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:18:03,163 INFO L276 IsEmpty]: Start isEmpty. Operand 23251 states and 30449 transitions. [2020-10-26 23:18:03,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-26 23:18:03,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:18:03,168 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:18:03,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:18:03,168 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:18:03,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:18:03,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1553060709, now seen corresponding path program 1 times [2020-10-26 23:18:03,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:18:03,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323464434] [2020-10-26 23:18:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:18:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:03,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:03,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:03,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:03,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:03,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:04,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:05,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:05,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-26 23:18:05,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 23:18:05,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2163 [2020-10-26 23:18:05,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:05,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:18:05,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:18:05,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 226 [2020-10-26 23:18:05,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:05,596 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:18:05,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:18:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:05,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:05,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:05,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:18:05,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:18:05,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:18:05,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:05,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:18:05,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:18:05,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:18:05,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:05,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:18:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:05,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:05,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:06,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:06,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:18:06,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:18:06,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-26 23:18:06,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:06,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:18:06,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:18:06,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-26 23:18:06,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:18:06,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:18:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:06,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:06,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:06,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:06,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 23:18:06,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:18:06,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-26 23:18:06,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:06,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:18:06,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-26 23:18:06,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:18:06,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:18:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-26 23:18:06,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323464434] [2020-10-26 23:18:06,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:18:06,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 23:18:06,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643283253] [2020-10-26 23:18:06,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:18:06,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:18:06,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:18:06,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:18:06,424 INFO L87 Difference]: Start difference. First operand 23251 states and 30449 transitions. Second operand 5 states. [2020-10-26 23:18:06,592 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 66