/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/Problem19_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:39:49,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:39:49,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:39:49,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:39:49,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:39:49,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:39:49,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:39:49,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:39:49,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:39:49,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:39:49,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:39:49,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:39:49,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:39:49,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:39:49,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:39:49,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:39:49,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:39:49,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:39:49,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:39:49,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:39:49,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:39:49,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:39:49,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:39:49,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:39:49,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:39:49,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:39:49,194 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:39:49,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:39:49,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:39:49,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:39:49,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:39:49,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:39:49,200 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:39:49,201 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:39:49,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:39:49,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:39:49,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:39:49,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:39:49,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:39:49,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:39:49,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:39:49,207 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 [2020-10-27 00:39:49,256 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:39:49,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:39:49,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:39:49,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:39:49,261 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:39:49,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:39:49,261 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:39:49,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:39:49,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:39:49,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:39:49,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:39:49,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:39:49,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:39:49,264 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:39:49,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:39:49,264 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:39:49,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:39:49,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:39:49,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:39:49,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:39:49,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:39:49,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:39:49,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:39:49,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:39:49,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:39:49,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:39:49,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:39:49,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:39:49,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:39:49,267 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:39:49,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:39:49,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:39:49,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:39:49,693 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:39:49,694 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:39:49,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label10.c [2020-10-27 00:39:49,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71abda2b4/edb5e5de2899422b908b1010d86cc5a7/FLAGb2bd964c8 [2020-10-27 00:39:51,026 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:39:51,027 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label10.c [2020-10-27 00:39:51,107 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71abda2b4/edb5e5de2899422b908b1010d86cc5a7/FLAGb2bd964c8 [2020-10-27 00:39:51,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71abda2b4/edb5e5de2899422b908b1010d86cc5a7 [2020-10-27 00:39:51,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:39:51,260 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:39:51,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:39:51,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:39:51,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:39:51,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:39:51" (1/1) ... [2020-10-27 00:39:51,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@323d00e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:51, skipping insertion in model container [2020-10-27 00:39:51,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:39:51" (1/1) ... [2020-10-27 00:39:51,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:39:51,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:39:53,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:39:53,713 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:39:54,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:39:54,798 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:39:54,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:54 WrapperNode [2020-10-27 00:39:54,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:39:54,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:39:54,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:39:54,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:39:54,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:54" (1/1) ... [2020-10-27 00:39:54,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:54" (1/1) ... [2020-10-27 00:39:55,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:54" (1/1) ... [2020-10-27 00:39:55,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:54" (1/1) ... [2020-10-27 00:39:55,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:54" (1/1) ... [2020-10-27 00:39:55,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:54" (1/1) ... [2020-10-27 00:39:55,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:54" (1/1) ... [2020-10-27 00:39:55,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:39:55,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:39:55,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:39:55,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:39:55,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:54" (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 [2020-10-27 00:39:55,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:39:55,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:39:55,577 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:39:55,578 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:39:55,578 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:39:55,578 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:39:55,578 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:39:55,578 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:39:55,579 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:39:55,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:39:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:39:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:39:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:39:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:39:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:39:55,581 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:39:55,581 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:39:55,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:39:55,582 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:39:55,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:39:55,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:39:55,582 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:39:55,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:39:55,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:39:55,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:39:55,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:39:55,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:39:55,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:39:55,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:40:14,745 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:40:14,746 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:40:14,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:40:14 BoogieIcfgContainer [2020-10-27 00:40:14,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:40:14,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:40:14,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:40:14,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:40:14,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:39:51" (1/3) ... [2020-10-27 00:40:14,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f218a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:40:14, skipping insertion in model container [2020-10-27 00:40:14,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:54" (2/3) ... [2020-10-27 00:40:14,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f218a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:40:14, skipping insertion in model container [2020-10-27 00:40:14,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:40:14" (3/3) ... [2020-10-27 00:40:14,763 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label10.c [2020-10-27 00:40:14,776 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:40:14,783 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:40:14,797 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:40:14,846 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:40:14,846 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:40:14,846 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:40:14,846 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:40:14,846 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:40:14,847 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:40:14,847 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:40:14,847 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:40:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:40:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 00:40:14,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:40:14,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:40:14,914 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:40:14,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:40:14,921 INFO L82 PathProgramCache]: Analyzing trace with hash -13683635, now seen corresponding path program 1 times [2020-10-27 00:40:14,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:40:14,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297318950] [2020-10-27 00:40:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:40:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:15,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:15,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:15,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 00:40:15,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:15,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-10-27 00:40:15,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:15,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:40:15,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:40:15,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 00:40:15,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:40:15,797 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:40:15,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:40:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:15,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:15,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:15,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:40:15,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:15,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 00:40:15,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:15,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:40:15,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:40:15,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:40:15,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:40:15,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297318950] [2020-10-27 00:40:15,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:40:15,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:40:15,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142239943] [2020-10-27 00:40:15,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:40:15,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:40:15,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:40:15,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:40:15,878 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 00:40:16,064 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:40:53,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:40:53,303 INFO L93 Difference]: Finished difference Result 5036 states and 9459 transitions. [2020-10-27 00:40:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:40:53,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-27 00:40:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:40:53,345 INFO L225 Difference]: With dead ends: 5036 [2020-10-27 00:40:53,345 INFO L226 Difference]: Without dead ends: 3191 [2020-10-27 00:40:53,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:40:53,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2020-10-27 00:40:53,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3185. [2020-10-27 00:40:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3185 states. [2020-10-27 00:40:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 4966 transitions. [2020-10-27 00:40:53,595 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 4966 transitions. Word has length 14 [2020-10-27 00:40:53,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:40:53,596 INFO L481 AbstractCegarLoop]: Abstraction has 3185 states and 4966 transitions. [2020-10-27 00:40:53,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:40:53,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 4966 transitions. [2020-10-27 00:40:53,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 00:40:53,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:40:53,604 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:40:53,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:40:53,605 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:40:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:40:53,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1897134161, now seen corresponding path program 1 times [2020-10-27 00:40:53,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:40:53,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411527438] [2020-10-27 00:40:53,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:40:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:53,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:53,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:53,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:54,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:55,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:55,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:55,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:55,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 00:40:55,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 00:40:55,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2132 [2020-10-27 00:40:55,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:55,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:40:55,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:40:55,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 00:40:55,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:40:55,970 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:40:55,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:40:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:55,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:55,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:55,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:40:55,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:55,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:40:55,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:55,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:40:55,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:40:55,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:40:55,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:40:56,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:40:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:56,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:56,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:56,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:56,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:56,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:40:56,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:40:56,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-27 00:40:56,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:56,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:40:56,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:40:56,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:40:56,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:40:56,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411527438] [2020-10-27 00:40:56,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:40:56,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:40:56,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359087879] [2020-10-27 00:40:56,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:40:56,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:40:56,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:40:56,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:40:56,627 INFO L87 Difference]: Start difference. First operand 3185 states and 4966 transitions. Second operand 7 states. [2020-10-27 00:40:56,821 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:40:57,600 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:42:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:42:00,097 INFO L93 Difference]: Finished difference Result 9484 states and 14858 transitions. [2020-10-27 00:42:00,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:42:00,100 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 87 [2020-10-27 00:42:00,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:42:00,136 INFO L225 Difference]: With dead ends: 9484 [2020-10-27 00:42:00,137 INFO L226 Difference]: Without dead ends: 6305 [2020-10-27 00:42:00,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:42:00,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2020-10-27 00:42:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 6187. [2020-10-27 00:42:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6187 states. [2020-10-27 00:42:00,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6187 states to 6187 states and 8554 transitions. [2020-10-27 00:42:00,366 INFO L78 Accepts]: Start accepts. Automaton has 6187 states and 8554 transitions. Word has length 87 [2020-10-27 00:42:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:42:00,367 INFO L481 AbstractCegarLoop]: Abstraction has 6187 states and 8554 transitions. [2020-10-27 00:42:00,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:42:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 6187 states and 8554 transitions. [2020-10-27 00:42:00,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 00:42:00,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:42:00,373 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:42:00,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:42:00,374 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:42:00,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:42:00,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1811027121, now seen corresponding path program 1 times [2020-10-27 00:42:00,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:42:00,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070696547] [2020-10-27 00:42:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:42:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:00,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:00,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:00,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:01,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:01,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 00:42:01,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:42:01,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1122 [2020-10-27 00:42:01,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:01,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:42:01,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:42:01,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:42:01,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:01,723 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:42:01,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:42:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:01,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:01,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:01,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:42:01,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:01,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:42:01,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:01,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:42:01,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:42:01,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:42:01,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:01,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:42:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:01,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:01,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:01,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:42:01,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:01,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-27 00:42:01,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:42:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:42:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:42:01,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:42:02,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070696547] [2020-10-27 00:42:02,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:42:02,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 00:42:02,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143553719] [2020-10-27 00:42:02,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:42:02,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:42:02,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:42:02,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:42:02,032 INFO L87 Difference]: Start difference. First operand 6187 states and 8554 transitions. Second operand 8 states. [2020-10-27 00:42:02,209 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:42:06,039 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:43:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:43:01,489 INFO L93 Difference]: Finished difference Result 18522 states and 26190 transitions. [2020-10-27 00:43:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:43:01,493 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 87 [2020-10-27 00:43:01,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:43:01,571 INFO L225 Difference]: With dead ends: 18522 [2020-10-27 00:43:01,571 INFO L226 Difference]: Without dead ends: 12341 [2020-10-27 00:43:01,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:43:01,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12341 states. [2020-10-27 00:43:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12341 to 12187. [2020-10-27 00:43:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12187 states. [2020-10-27 00:43:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12187 states to 12187 states and 16961 transitions. [2020-10-27 00:43:01,961 INFO L78 Accepts]: Start accepts. Automaton has 12187 states and 16961 transitions. Word has length 87 [2020-10-27 00:43:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:43:01,970 INFO L481 AbstractCegarLoop]: Abstraction has 12187 states and 16961 transitions. [2020-10-27 00:43:01,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:43:01,970 INFO L276 IsEmpty]: Start isEmpty. Operand 12187 states and 16961 transitions. [2020-10-27 00:43:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 00:43:01,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:43:01,977 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:43:01,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:43:01,977 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:43:01,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:43:01,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1244844952, now seen corresponding path program 1 times [2020-10-27 00:43:01,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:43:01,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301328986] [2020-10-27 00:43:01,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:43:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:43:02,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:02,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:02,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:43:02,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 00:43:02,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:43:02,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-27 00:43:02,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:43:02,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:43:02,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:43:02,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:43:02,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:43:02,956 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:43:02,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:43:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:43:02,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:02,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:43:02,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:43:02,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:43:02,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:43:02,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:43:02,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:43:02,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:43:02,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:43:02,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:43:03,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:43:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:43:03,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:43:03,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:43:03,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 00:43:03,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:43:03,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 00:43:03,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:43:03,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:43:03,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:43:03,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:43:03,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:43:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:43:03,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301328986] [2020-10-27 00:43:03,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:43:03,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:43:03,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995256177] [2020-10-27 00:43:03,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:43:03,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:43:03,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:43:03,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:43:03,313 INFO L87 Difference]: Start difference. First operand 12187 states and 16961 transitions. Second operand 7 states. [2020-10-27 00:43:03,538 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:43:10,540 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 68