/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_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:52:06,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:52:06,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:52:06,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:52:06,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:52:06,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:52:06,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:52:06,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:52:06,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:52:06,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:52:06,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:52:06,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:52:06,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:52:06,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:52:06,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:52:06,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:52:06,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:52:06,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:52:06,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:52:06,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:52:06,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:52:06,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:52:06,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:52:06,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:52:06,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:52:06,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:52:06,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:52:06,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:52:06,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:52:06,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:52:06,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:52:06,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:52:06,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:52:06,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:52:06,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:52:06,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:52:06,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:52:06,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:52:06,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:52:06,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:52:06,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:52:06,331 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 00:52:06,388 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:52:06,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:52:06,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:52:06,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:52:06,394 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:52:06,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:52:06,395 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:52:06,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:52:06,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:52:06,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:52:06,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:52:06,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:52:06,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:52:06,398 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:52:06,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:52:06,398 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:52:06,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:52:06,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:52:06,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:52:06,399 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:52:06,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:52:06,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:52:06,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:52:06,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:52:06,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:52:06,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:52:06,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:52:06,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:52:06,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:52:06,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:52:06,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:52:06,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:52:06,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:52:06,938 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:52:06,938 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:52:06,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label52.c [2020-10-27 00:52:07,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74ef65da1/af08ba8d7c4b4f77932929a1d0632736/FLAG20b90faa2 [2020-10-27 00:52:08,388 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:52:08,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label52.c [2020-10-27 00:52:08,478 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74ef65da1/af08ba8d7c4b4f77932929a1d0632736/FLAG20b90faa2 [2020-10-27 00:52:08,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74ef65da1/af08ba8d7c4b4f77932929a1d0632736 [2020-10-27 00:52:08,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:52:08,675 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:52:08,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:52:08,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:52:08,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:52:08,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:52:08" (1/1) ... [2020-10-27 00:52:08,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a5d40e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:08, skipping insertion in model container [2020-10-27 00:52:08,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:52:08" (1/1) ... [2020-10-27 00:52:08,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:52:08,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:52:11,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:52:11,229 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:52:12,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:52:12,606 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:52:12,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:12 WrapperNode [2020-10-27 00:52:12,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:52:12,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:52:12,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:52:12,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:52:12,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:12" (1/1) ... [2020-10-27 00:52:12,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:12" (1/1) ... [2020-10-27 00:52:12,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:12" (1/1) ... [2020-10-27 00:52:12,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:12" (1/1) ... [2020-10-27 00:52:13,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:12" (1/1) ... [2020-10-27 00:52:13,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:12" (1/1) ... [2020-10-27 00:52:13,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:12" (1/1) ... [2020-10-27 00:52:13,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:52:13,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:52:13,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:52:13,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:52:13,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:12" (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 00:52:13,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:52:13,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:52:13,561 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:52:13,562 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:52:13,562 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:52:13,562 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:52:13,562 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:52:13,563 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:52:13,563 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:52:13,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:52:13,564 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:52:13,564 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:52:13,564 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:52:13,565 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:52:13,565 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:52:13,566 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:52:13,566 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:52:13,566 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:52:13,566 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:52:13,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:52:13,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:52:13,567 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:52:13,567 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:52:13,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:52:13,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:52:13,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:52:13,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:52:13,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:52:13,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:52:30,546 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:52:30,547 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:52:30,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:52:30 BoogieIcfgContainer [2020-10-27 00:52:30,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:52:30,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:52:30,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:52:30,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:52:30,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:52:08" (1/3) ... [2020-10-27 00:52:30,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c91a9e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:52:30, skipping insertion in model container [2020-10-27 00:52:30,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:12" (2/3) ... [2020-10-27 00:52:30,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c91a9e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:52:30, skipping insertion in model container [2020-10-27 00:52:30,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:52:30" (3/3) ... [2020-10-27 00:52:30,567 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label52.c [2020-10-27 00:52:30,581 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:52:30,589 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:52:30,606 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:52:30,649 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:52:30,649 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:52:30,649 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:52:30,649 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:52:30,649 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:52:30,650 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:52:30,650 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:52:30,650 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:52:30,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:52:30,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 00:52:30,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:52:30,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:52:30,714 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:52:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:52:30,723 INFO L82 PathProgramCache]: Analyzing trace with hash 875298829, now seen corresponding path program 1 times [2020-10-27 00:52:30,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:52:30,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754770497] [2020-10-27 00:52:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:52:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:31,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:31,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:31,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:52:31,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:52:31,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-27 00:52:31,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:31,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:52:31,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:52:31,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 00:52:31,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:52:32,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:52:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:32,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:32,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:32,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:52:32,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:52:32,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 00:52:32,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:32,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:52:32,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:52:32,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:52:32,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:52:32,146 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 00:52:32,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754770497] [2020-10-27 00:52:32,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:52:32,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:52:32,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436485789] [2020-10-27 00:52:32,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:52:32,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:52:32,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:52:32,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:52:32,184 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 00:53:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:53:05,853 INFO L93 Difference]: Finished difference Result 5100 states and 9572 transitions. [2020-10-27 00:53:05,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:53:05,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-27 00:53:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:53:05,911 INFO L225 Difference]: With dead ends: 5100 [2020-10-27 00:53:05,912 INFO L226 Difference]: Without dead ends: 3255 [2020-10-27 00:53:05,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:53:05,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-10-27 00:53:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3209. [2020-10-27 00:53:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3209 states. [2020-10-27 00:53:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5178 transitions. [2020-10-27 00:53:06,202 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5178 transitions. Word has length 62 [2020-10-27 00:53:06,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:53:06,205 INFO L481 AbstractCegarLoop]: Abstraction has 3209 states and 5178 transitions. [2020-10-27 00:53:06,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:53:06,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5178 transitions. [2020-10-27 00:53:06,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 00:53:06,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:53:06,224 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:53:06,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:53:06,227 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:53:06,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:53:06,228 INFO L82 PathProgramCache]: Analyzing trace with hash -337237180, now seen corresponding path program 1 times [2020-10-27 00:53:06,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:53:06,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487263393] [2020-10-27 00:53:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:53:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:06,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:06,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:07,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:07,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:07,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 00:53:07,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:53:07,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1483 [2020-10-27 00:53:07,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:07,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:53:07,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:53:07,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-27 00:53:07,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:53:07,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:53:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:07,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:07,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:07,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:53:07,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:53:07,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 00:53:07,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:07,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:53:07,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:53:07,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:53:07,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:53:08,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:53:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:08,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:08,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:08,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:08,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:53:08,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:53:08,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-27 00:53:08,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:08,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:53:08,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:53:08,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:53:08,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:53:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:53:08,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487263393] [2020-10-27 00:53:08,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:53:08,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:53:08,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362277736] [2020-10-27 00:53:08,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:53:08,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:53:08,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:53:08,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:53:08,500 INFO L87 Difference]: Start difference. First operand 3209 states and 5178 transitions. Second operand 7 states. [2020-10-27 00:54:01,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:54:01,622 INFO L93 Difference]: Finished difference Result 12129 states and 19927 transitions. [2020-10-27 00:54:01,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 00:54:01,624 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 137 [2020-10-27 00:54:01,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:54:01,684 INFO L225 Difference]: With dead ends: 12129 [2020-10-27 00:54:01,684 INFO L226 Difference]: Without dead ends: 8926 [2020-10-27 00:54:01,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:54:01,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8926 states. [2020-10-27 00:54:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8926 to 8913. [2020-10-27 00:54:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8913 states. [2020-10-27 00:54:01,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8913 states to 8913 states and 13336 transitions. [2020-10-27 00:54:01,988 INFO L78 Accepts]: Start accepts. Automaton has 8913 states and 13336 transitions. Word has length 137 [2020-10-27 00:54:01,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:54:01,989 INFO L481 AbstractCegarLoop]: Abstraction has 8913 states and 13336 transitions. [2020-10-27 00:54:01,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:54:01,989 INFO L276 IsEmpty]: Start isEmpty. Operand 8913 states and 13336 transitions. [2020-10-27 00:54:01,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-27 00:54:01,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:54:01,993 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:54:01,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:54:01,994 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:54:01,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:54:01,994 INFO L82 PathProgramCache]: Analyzing trace with hash -901475099, now seen corresponding path program 1 times [2020-10-27 00:54:01,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:54:01,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226617250] [2020-10-27 00:54:01,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:54:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:02,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:02,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:04,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:05,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:05,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-27 00:54:05,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:54:05,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2955 [2020-10-27 00:54:05,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:05,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:54:05,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:54:05,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-27 00:54:05,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:05,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:54:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:05,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:05,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:05,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:54:05,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:54:05,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 00:54:05,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:05,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:54:05,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:54:05,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:54:05,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:05,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:54:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:05,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:05,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:05,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 00:54:05,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:54:05,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-27 00:54:05,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:05,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:54:05,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:54:05,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-27 00:54:05,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:54:05,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226617250] [2020-10-27 00:54:05,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:54:05,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:54:05,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770643537] [2020-10-27 00:54:05,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:54:05,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:54:05,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:54:05,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:54:05,644 INFO L87 Difference]: Start difference. First operand 8913 states and 13336 transitions. Second operand 7 states. [2020-10-27 00:54:45,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:54:45,640 INFO L93 Difference]: Finished difference Result 27038 states and 41518 transitions. [2020-10-27 00:54:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:54:45,642 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 182 [2020-10-27 00:54:45,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:54:45,717 INFO L225 Difference]: With dead ends: 27038 [2020-10-27 00:54:45,718 INFO L226 Difference]: Without dead ends: 18131 [2020-10-27 00:54:45,749 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 [2020-10-27 00:54:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18131 states. [2020-10-27 00:54:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18131 to 17904. [2020-10-27 00:54:46,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17904 states. [2020-10-27 00:54:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17904 states to 17904 states and 24398 transitions. [2020-10-27 00:54:46,417 INFO L78 Accepts]: Start accepts. Automaton has 17904 states and 24398 transitions. Word has length 182 [2020-10-27 00:54:46,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:54:46,420 INFO L481 AbstractCegarLoop]: Abstraction has 17904 states and 24398 transitions. [2020-10-27 00:54:46,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:54:46,423 INFO L276 IsEmpty]: Start isEmpty. Operand 17904 states and 24398 transitions. [2020-10-27 00:54:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-27 00:54:46,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:54:46,431 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:54:46,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:54:46,432 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:54:46,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:54:46,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2134654986, now seen corresponding path program 1 times [2020-10-27 00:54:46,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:54:46,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32628419] [2020-10-27 00:54:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:54:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:46,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:46,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:46,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:47,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:47,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:47,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-27 00:54:47,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:54:47,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1409 [2020-10-27 00:54:47,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:47,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:54:47,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:54:47,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-27 00:54:47,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:48,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:54:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:48,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:48,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:48,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:54:48,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:54:48,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:54:48,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:48,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:54:48,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:54:48,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:54:48,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:48,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:54:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:48,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:48,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:48,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:48,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 00:54:48,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:54:48,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-27 00:54:48,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:54:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:54:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 00:54:48,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:54:48,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32628419] [2020-10-27 00:54:48,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:54:48,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:54:48,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760814931] [2020-10-27 00:54:48,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:54:48,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:54:48,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:54:48,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:54:48,671 INFO L87 Difference]: Start difference. First operand 17904 states and 24398 transitions. Second operand 7 states. [2020-10-27 00:55:39,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:55:39,706 INFO L93 Difference]: Finished difference Result 54001 states and 75773 transitions. [2020-10-27 00:55:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:55:39,709 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 185 [2020-10-27 00:55:39,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:55:39,925 INFO L225 Difference]: With dead ends: 54001 [2020-10-27 00:55:39,925 INFO L226 Difference]: Without dead ends: 36103 [2020-10-27 00:55:39,977 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 [2020-10-27 00:55:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36103 states. [2020-10-27 00:55:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36103 to 31590. [2020-10-27 00:55:40,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31590 states. [2020-10-27 00:55:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31590 states to 31590 states and 43360 transitions. [2020-10-27 00:55:40,793 INFO L78 Accepts]: Start accepts. Automaton has 31590 states and 43360 transitions. Word has length 185 [2020-10-27 00:55:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:55:40,794 INFO L481 AbstractCegarLoop]: Abstraction has 31590 states and 43360 transitions. [2020-10-27 00:55:40,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:55:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 31590 states and 43360 transitions. [2020-10-27 00:55:40,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2020-10-27 00:55:40,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:55:40,804 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 00:55:40,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:55:40,804 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:55:40,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:55:40,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1796101729, now seen corresponding path program 1 times [2020-10-27 00:55:40,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:55:40,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973182493] [2020-10-27 00:55:40,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:55:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:55:40,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:41,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:41,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:41,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:42,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:45,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:55:45,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 404 [2020-10-27 00:55:45,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:55:45,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 00:55:45,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:55:45,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:55:45,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:55:45,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-27 00:55:45,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:55:46,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:55:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:55:46,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:46,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:55:46,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:55:46,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:55:46,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 00:55:46,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:55:46,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:55:46,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:55:46,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:55:46,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:55:46,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:55:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:55:46,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:46,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:55:46,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 00:55:46,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:55:46,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-27 00:55:46,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:55:46,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:55:46,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:55:46,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-27 00:55:46,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:55:46,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-10-27 00:55:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:55:46,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:46,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:55:46,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 00:55:46,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:55:46,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 00:55:46,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:55:46,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:55:46,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 00:55:46,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:55:46,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:55:46,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2020-10-27 00:55:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:55:46,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:46,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:55:46,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 00:55:46,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:55:46,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-27 00:55:46,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:55:46,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:55:46,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 00:55:46,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:55:46,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:55:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 162 proven. 174 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-10-27 00:55:46,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973182493] [2020-10-27 00:55:46,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:55:46,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:55:46,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458629876] [2020-10-27 00:55:46,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:55:46,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:55:46,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:55:46,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:55:46,890 INFO L87 Difference]: Start difference. First operand 31590 states and 43360 transitions. Second operand 7 states. [2020-10-27 00:55:47,052 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 66