/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/Problem06_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:40:07,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:40:07,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:40:07,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:40:07,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:40:07,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:40:07,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:40:07,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:40:07,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:40:07,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:40:07,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:40:07,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:40:07,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:40:07,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:40:07,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:40:07,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:40:07,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:40:07,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:40:07,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:40:07,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:40:07,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:40:07,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:40:07,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:40:07,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:40:07,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:40:07,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:40:07,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:40:07,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:40:07,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:40:07,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:40:07,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:40:07,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:40:07,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:40:07,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:40:07,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:40:07,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:40:07,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:40:07,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:40:07,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:40:07,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:40:07,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:40:07,457 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 21:40:07,511 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:40:07,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:40:07,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:40:07,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:40:07,518 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:40:07,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:40:07,519 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:40:07,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:40:07,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:40:07,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:40:07,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:40:07,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:40:07,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:40:07,521 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:40:07,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:40:07,522 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:40:07,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:40:07,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:40:07,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:40:07,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:40:07,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:40:07,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:40:07,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:40:07,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:40:07,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:40:07,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:40:07,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:40:07,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:40:07,525 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:40:07,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:40:07,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:40:07,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:40:07,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:40:07,958 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:40:07,959 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:40:07,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label55.c [2020-10-26 21:40:08,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6b9693f5/06b00a72155040ab9dfa3ba14fc4a7a8/FLAG41e92c01e [2020-10-26 21:40:09,209 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:40:09,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label55.c [2020-10-26 21:40:09,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6b9693f5/06b00a72155040ab9dfa3ba14fc4a7a8/FLAG41e92c01e [2020-10-26 21:40:09,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6b9693f5/06b00a72155040ab9dfa3ba14fc4a7a8 [2020-10-26 21:40:09,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:40:09,533 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:40:09,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:40:09,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:40:09,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:40:09,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:40:09" (1/1) ... [2020-10-26 21:40:09,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62890919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:09, skipping insertion in model container [2020-10-26 21:40:09,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:40:09" (1/1) ... [2020-10-26 21:40:09,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:40:09,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:40:11,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:40:11,970 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:40:13,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:40:13,216 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:40:13,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:13 WrapperNode [2020-10-26 21:40:13,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:40:13,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:40:13,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:40:13,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:40:13,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:13" (1/1) ... [2020-10-26 21:40:13,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:13" (1/1) ... [2020-10-26 21:40:13,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:13" (1/1) ... [2020-10-26 21:40:13,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:13" (1/1) ... [2020-10-26 21:40:13,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:13" (1/1) ... [2020-10-26 21:40:13,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:13" (1/1) ... [2020-10-26 21:40:13,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:13" (1/1) ... [2020-10-26 21:40:13,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:40:13,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:40:13,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:40:13,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:40:13,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:40:13,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:40:13,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:40:13,812 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:40:13,813 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:40:13,813 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:40:13,813 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:40:13,813 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:40:13,813 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:40:13,813 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:40:13,814 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:40:13,815 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:40:13,815 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:40:13,918 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:40:13,918 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:40:13,919 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:40:13,919 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:40:13,919 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:40:13,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:40:13,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:40:13,919 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:40:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:40:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:40:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:40:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:40:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:40:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:40:13,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:40:20,722 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:40:20,722 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:40:20,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:40:20 BoogieIcfgContainer [2020-10-26 21:40:20,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:40:20,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:40:20,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:40:20,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:40:20,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:40:09" (1/3) ... [2020-10-26 21:40:20,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59938099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:40:20, skipping insertion in model container [2020-10-26 21:40:20,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:13" (2/3) ... [2020-10-26 21:40:20,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59938099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:40:20, skipping insertion in model container [2020-10-26 21:40:20,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:40:20" (3/3) ... [2020-10-26 21:40:20,739 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label55.c [2020-10-26 21:40:20,752 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:40:20,759 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:40:20,772 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:40:20,823 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:40:20,823 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:40:20,823 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:40:20,823 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:40:20,823 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:40:20,824 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:40:20,824 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:40:20,824 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:40:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:40:20,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 977 [2020-10-26 21:40:20,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:40:20,951 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:40:20,952 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:40:20,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:40:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash -235625336, now seen corresponding path program 1 times [2020-10-26 21:40:20,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:40:20,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826069751] [2020-10-26 21:40:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:40:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:40:22,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:24,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:27,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:40:27,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 994 [2020-10-26 21:40:27,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:40:27,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5203 [2020-10-26 21:40:27,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:40:27,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 21:40:27,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:40:27,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-26 21:40:27,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 21:40:31,040 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:40:31,251 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:40:31,548 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:40:31,750 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-26 21:40:31,921 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 21:40:32,114 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 21:40:32,343 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 21:40:32,523 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 21:40:32,700 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 21:40:32,880 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 21:40:33,454 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:40:33,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:40:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:40:33,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:33,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:40:33,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:40:33,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:40:33,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 21:40:33,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:40:33,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:40:33,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:40:33,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:40:33,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:40:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:40:45,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826069751] [2020-10-26 21:40:45,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:40:45,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 21:40:45,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099629073] [2020-10-26 21:40:45,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:40:45,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:40:45,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:40:45,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:40:45,677 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-26 21:40:46,168 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-26 21:40:46,999 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 21:40:47,842 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 21:40:48,768 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 204 [2020-10-26 21:40:52,794 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 203 [2020-10-26 21:40:56,337 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 215 DAG size of output: 202 [2020-10-26 21:40:58,910 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 193 [2020-10-26 21:40:59,733 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 199 [2020-10-26 21:41:00,822 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 198 [2020-10-26 21:41:10,156 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 191 [2020-10-26 21:41:10,936 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 196 [2020-10-26 21:41:13,815 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 195 [2020-10-26 21:41:20,893 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 189 [2020-10-26 21:41:21,685 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 193 [2020-10-26 21:41:24,166 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 191 [2020-10-26 21:41:36,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:41:36,027 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-26 21:41:36,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 21:41:36,030 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 976 [2020-10-26 21:41:36,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:41:36,080 INFO L225 Difference]: With dead ends: 3401 [2020-10-26 21:41:36,081 INFO L226 Difference]: Without dead ends: 2020 [2020-10-26 21:41:36,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:41:36,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-26 21:41:36,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-26 21:41:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-26 21:41:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-26 21:41:36,265 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 976 [2020-10-26 21:41:36,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:41:36,268 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-26 21:41:36,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:41:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-26 21:41:36,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1047 [2020-10-26 21:41:36,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:41:36,312 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:41:36,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:41:36,313 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:41:36,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:41:36,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1813317201, now seen corresponding path program 1 times [2020-10-26 21:41:36,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:41:36,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475322648] [2020-10-26 21:41:36,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:41:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:36,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:38,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:41,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:41,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1066 [2020-10-26 21:41:41,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:41:41,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 21:41:41,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:41,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:41:41,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:41:41,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:41:41,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:41,951 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:41:41,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:41:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:41,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:41,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:41,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:41:41,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:41:41,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 21:41:41,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:41,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:41:41,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:41:41,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:41:41,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:42,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:41:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:42,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:42,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:42,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 21:41:42,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:41:42,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-26 21:41:42,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:42,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:41:42,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:41:42,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 21:41:42,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:41:44,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475322648] [2020-10-26 21:41:44,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:41:44,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:41:44,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080051674] [2020-10-26 21:41:44,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:41:44,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:41:44,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:41:44,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:41:44,693 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 7 states. [2020-10-26 21:41:44,936 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 21:41:46,169 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 21:42:07,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:42:07,980 INFO L93 Difference]: Finished difference Result 4482 states and 7525 transitions. [2020-10-26 21:42:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:42:07,981 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1046 [2020-10-26 21:42:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:42:08,001 INFO L225 Difference]: With dead ends: 4482 [2020-10-26 21:42:08,001 INFO L226 Difference]: Without dead ends: 3222 [2020-10-26 21:42:08,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:42:08,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2020-10-26 21:42:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 3161. [2020-10-26 21:42:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3161 states. [2020-10-26 21:42:08,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 4673 transitions. [2020-10-26 21:42:08,118 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 4673 transitions. Word has length 1046 [2020-10-26 21:42:08,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:42:08,119 INFO L481 AbstractCegarLoop]: Abstraction has 3161 states and 4673 transitions. [2020-10-26 21:42:08,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:42:08,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 4673 transitions. [2020-10-26 21:42:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1099 [2020-10-26 21:42:08,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:42:08,138 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:42:08,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:42:08,139 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:42:08,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:42:08,139 INFO L82 PathProgramCache]: Analyzing trace with hash 652849236, now seen corresponding path program 1 times [2020-10-26 21:42:08,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:42:08,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156661302] [2020-10-26 21:42:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:42:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:08,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:10,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:13,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:13,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1118 [2020-10-26 21:42:13,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:42:13,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-26 21:42:13,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:13,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 21:42:13,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:42:13,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 552 [2020-10-26 21:42:13,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:42:15,821 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-26 21:42:15,977 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-26 21:42:16,159 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-26 21:42:16,325 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-26 21:42:16,471 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-26 21:42:16,742 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-26 21:42:16,916 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-26 21:42:17,054 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-26 21:42:17,195 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-26 21:42:17,413 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:42:17,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:42:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:17,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:17,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:17,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:42:17,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:42:17,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 21:42:17,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:17,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:42:17,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:42:17,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:42:17,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:42:17,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:42:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:17,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:18,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:18,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:42:18,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:42:18,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-26 21:42:18,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:18,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 21:42:18,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:42:18,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:42:18,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:42:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:42:27,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156661302] [2020-10-26 21:42:27,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:42:27,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 21:42:27,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969129297] [2020-10-26 21:42:27,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:42:27,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:42:27,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:42:27,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:42:27,103 INFO L87 Difference]: Start difference. First operand 3161 states and 4673 transitions. Second operand 18 states. [2020-10-26 21:42:27,405 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-26 21:42:29,439 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-26 21:42:29,669 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-26 21:42:29,946 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-10-26 21:42:30,699 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 198 [2020-10-26 21:42:31,532 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 206 [2020-10-26 21:42:32,887 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 205 [2020-10-26 21:42:36,273 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 226 DAG size of output: 204 [2020-10-26 21:42:46,015 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 202 [2020-10-26 21:42:46,974 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 216 [2020-10-26 21:42:48,501 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 213 [2020-10-26 21:42:58,614 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 221 DAG size of output: 210 [2020-10-26 21:43:00,284 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 223 DAG size of output: 206 [2020-10-26 21:43:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:43:24,247 INFO L93 Difference]: Finished difference Result 8453 states and 13443 transitions. [2020-10-26 21:43:24,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 21:43:24,248 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1098 [2020-10-26 21:43:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:43:24,283 INFO L225 Difference]: With dead ends: 8453 [2020-10-26 21:43:24,284 INFO L226 Difference]: Without dead ends: 6052 [2020-10-26 21:43:24,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2020-10-26 21:43:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6052 states. [2020-10-26 21:43:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6052 to 5936. [2020-10-26 21:43:24,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5936 states. [2020-10-26 21:43:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5936 states to 5936 states and 8866 transitions. [2020-10-26 21:43:24,495 INFO L78 Accepts]: Start accepts. Automaton has 5936 states and 8866 transitions. Word has length 1098 [2020-10-26 21:43:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:43:24,496 INFO L481 AbstractCegarLoop]: Abstraction has 5936 states and 8866 transitions. [2020-10-26 21:43:24,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:43:24,501 INFO L276 IsEmpty]: Start isEmpty. Operand 5936 states and 8866 transitions. [2020-10-26 21:43:24,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1124 [2020-10-26 21:43:24,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:43:24,536 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:43:24,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:43:24,537 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:43:24,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:43:24,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2090054262, now seen corresponding path program 1 times [2020-10-26 21:43:24,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:43:24,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399440593] [2020-10-26 21:43:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:43:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:43:25,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:26,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:30,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:43:30,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1145 [2020-10-26 21:43:30,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:43:30,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5260 [2020-10-26 21:43:30,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:43:30,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 21:43:30,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:43:30,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1136 [2020-10-26 21:43:30,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:43:31,117 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:43:31,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:43:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:43:31,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:31,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:43:31,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:43:31,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:43:31,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 21:43:31,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:43:31,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:43:31,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:43:31,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:43:31,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:43:31,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:43:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:43:31,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:31,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:31,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:43:31,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:43:31,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:43:31,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-26 21:43:31,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:43:31,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:43:31,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:43:31,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:43:31,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:43:31,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-26 21:43:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:43:32,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:32,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:43:32,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 21:43:32,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:43:32,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-26 21:43:32,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:43:32,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:43:32,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:43:32,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 21:43:32,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:43:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 135 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 21:43:33,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399440593] [2020-10-26 21:43:33,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:43:33,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 21:43:33,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266988319] [2020-10-26 21:43:33,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:43:33,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:43:33,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:43:33,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:43:33,548 INFO L87 Difference]: Start difference. First operand 5936 states and 8866 transitions. Second operand 7 states. [2020-10-26 21:43:33,765 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:43:53,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:43:53,002 INFO L93 Difference]: Finished difference Result 15805 states and 24794 transitions. [2020-10-26 21:43:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 21:43:53,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1123 [2020-10-26 21:43:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:43:53,067 INFO L225 Difference]: With dead ends: 15805 [2020-10-26 21:43:53,069 INFO L226 Difference]: Without dead ends: 10629 [2020-10-26 21:43:53,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-26 21:43:53,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10629 states. [2020-10-26 21:43:53,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10629 to 10498. [2020-10-26 21:43:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10498 states. [2020-10-26 21:43:53,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10498 states to 10498 states and 15350 transitions. [2020-10-26 21:43:53,441 INFO L78 Accepts]: Start accepts. Automaton has 10498 states and 15350 transitions. Word has length 1123 [2020-10-26 21:43:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:43:53,443 INFO L481 AbstractCegarLoop]: Abstraction has 10498 states and 15350 transitions. [2020-10-26 21:43:53,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:43:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 10498 states and 15350 transitions. [2020-10-26 21:43:53,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1136 [2020-10-26 21:43:53,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:43:53,489 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:43:53,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 21:43:53,489 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:43:53,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:43:53,490 INFO L82 PathProgramCache]: Analyzing trace with hash -326051537, now seen corresponding path program 1 times [2020-10-26 21:43:53,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:43:53,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541386106] [2020-10-26 21:43:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:43:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:43:53,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:54,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking...