/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/Problem04_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:59:09,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:59:09,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:59:09,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:59:09,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:59:09,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:59:09,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:59:09,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:59:09,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:59:09,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:59:09,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:59:09,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:59:09,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:59:09,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:59:09,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:59:09,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:59:09,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:59:09,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:59:09,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:59:09,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:59:09,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:59:09,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:59:09,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:59:09,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:59:09,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:59:09,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:59:09,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:59:09,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:59:09,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:59:09,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:59:09,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:59:09,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:59:09,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:59:09,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:59:09,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:59:09,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:59:09,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:59:09,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:59:09,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:59:09,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:59:09,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:59:09,776 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 20:59:09,811 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:59:09,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:59:09,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:59:09,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:59:09,816 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:59:09,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:59:09,818 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:59:09,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:59:09,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:59:09,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:59:09,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:59:09,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:59:09,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:59:09,819 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:59:09,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:59:09,820 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:59:09,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:59:09,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:59:09,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:59:09,822 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:59:09,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:59:09,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:59:09,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:59:09,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:59:09,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:59:09,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:59:09,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:59:09,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:59:09,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:59:09,824 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:59:10,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:59:10,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:59:10,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:59:10,271 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:59:10,272 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:59:10,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label21.c [2020-10-26 20:59:10,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fbcc6f447/06606609dee443609a86438dbfedded5/FLAG2afe9b4d3 [2020-10-26 20:59:11,520 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:59:11,521 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label21.c [2020-10-26 20:59:11,554 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fbcc6f447/06606609dee443609a86438dbfedded5/FLAG2afe9b4d3 [2020-10-26 20:59:11,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fbcc6f447/06606609dee443609a86438dbfedded5 [2020-10-26 20:59:11,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:59:11,935 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:59:11,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:59:11,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:59:11,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:59:11,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:59:11" (1/1) ... [2020-10-26 20:59:11,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51498653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:59:11, skipping insertion in model container [2020-10-26 20:59:11,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:59:11" (1/1) ... [2020-10-26 20:59:11,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:59:12,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:59:13,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:59:13,550 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:59:14,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:59:14,270 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:59:14,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:59:14 WrapperNode [2020-10-26 20:59:14,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:59:14,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:59:14,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:59:14,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:59:14,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:59:14" (1/1) ... [2020-10-26 20:59:14,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:59:14" (1/1) ... [2020-10-26 20:59:14,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:59:14" (1/1) ... [2020-10-26 20:59:14,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:59:14" (1/1) ... [2020-10-26 20:59:14,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:59:14" (1/1) ... [2020-10-26 20:59:14,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:59:14" (1/1) ... [2020-10-26 20:59:14,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:59:14" (1/1) ... [2020-10-26 20:59:14,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:59:14,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:59:14,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:59:14,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:59:14,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:59:14" (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 20:59:14,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:59:14,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:59:14,778 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:59:14,778 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:59:14,778 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 20:59:14,778 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 20:59:14,779 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 20:59:14,779 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:59:14,779 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:59:14,779 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 20:59:14,779 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 20:59:14,779 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 20:59:14,780 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:59:14,780 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:59:14,780 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:59:14,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:59:14,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:59:14,780 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:59:14,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:59:14,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:59:14,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:59:14,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:59:14,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:59:14,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:59:14,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:59:19,490 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:59:19,492 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:59:19,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:59:19 BoogieIcfgContainer [2020-10-26 20:59:19,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:59:19,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:59:19,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:59:19,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:59:19,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:59:11" (1/3) ... [2020-10-26 20:59:19,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79186afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:59:19, skipping insertion in model container [2020-10-26 20:59:19,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:59:14" (2/3) ... [2020-10-26 20:59:19,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79186afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:59:19, skipping insertion in model container [2020-10-26 20:59:19,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:59:19" (3/3) ... [2020-10-26 20:59:19,549 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label21.c [2020-10-26 20:59:19,562 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:59:19,568 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:59:19,583 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:59:19,618 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:59:19,618 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:59:19,619 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:59:19,619 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:59:19,619 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:59:19,619 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:59:19,619 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:59:19,619 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:59:19,656 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-26 20:59:19,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2020-10-26 20:59:19,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:59:19,717 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] [2020-10-26 20:59:19,718 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:59:19,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:59:19,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1244846704, now seen corresponding path program 1 times [2020-10-26 20:59:19,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:59:19,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170248877] [2020-10-26 20:59:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:59:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:20,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:25,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:25,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 825 [2020-10-26 20:59:25,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:25,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5082 [2020-10-26 20:59:25,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:25,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 20:59:25,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:59:25,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 816 [2020-10-26 20:59:25,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:59:26,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:59:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:26,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:26,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:26,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:59:26,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:26,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 20:59:26,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:26,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:59:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:59:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:59:26,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:59:27,958 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 20:59:27,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170248877] [2020-10-26 20:59:27,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:59:27,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:59:27,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187893417] [2020-10-26 20:59:27,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:59:27,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:59:28,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:59:28,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:59:28,006 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 5 states. [2020-10-26 20:59:39,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:59:39,782 INFO L93 Difference]: Finished difference Result 2677 states and 5143 transitions. [2020-10-26 20:59:39,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:59:39,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 809 [2020-10-26 20:59:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:59:39,843 INFO L225 Difference]: With dead ends: 2677 [2020-10-26 20:59:39,843 INFO L226 Difference]: Without dead ends: 1703 [2020-10-26 20:59:39,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:59:39,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-26 20:59:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1690. [2020-10-26 20:59:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-10-26 20:59:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 3006 transitions. [2020-10-26 20:59:40,061 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 3006 transitions. Word has length 809 [2020-10-26 20:59:40,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:59:40,065 INFO L481 AbstractCegarLoop]: Abstraction has 1690 states and 3006 transitions. [2020-10-26 20:59:40,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:59:40,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 3006 transitions. [2020-10-26 20:59:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 818 [2020-10-26 20:59:40,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:59:40,103 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 20:59:40,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:59:40,104 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:59:40,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:59:40,105 INFO L82 PathProgramCache]: Analyzing trace with hash -14867250, now seen corresponding path program 1 times [2020-10-26 20:59:40,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:59:40,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326323601] [2020-10-26 20:59:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:59:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:40,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:41,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:45,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:45,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:45,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 835 [2020-10-26 20:59:45,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:59:45,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5207 [2020-10-26 20:59:45,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:45,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:59:45,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:59:45,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 20:59:45,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:59:45,756 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 20:59:45,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:59:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:45,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:45,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:45,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:59:45,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:45,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:59:45,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:45,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:59:45,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:59:45,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:59:45,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:45,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:59:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:45,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:45,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:45,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 20:59:45,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:45,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:59:45,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:45,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:59:45,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:59:45,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 20:59:45,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:59:46,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326323601] [2020-10-26 20:59:46,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:59:46,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 20:59:46,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607682122] [2020-10-26 20:59:46,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:59:46,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:59:46,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:59:46,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:59:46,425 INFO L87 Difference]: Start difference. First operand 1690 states and 3006 transitions. Second operand 8 states. [2020-10-26 20:59:46,568 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-26 20:59:54,345 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-26 21:00:00,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:00:00,665 INFO L93 Difference]: Finished difference Result 5178 states and 9251 transitions. [2020-10-26 21:00:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:00:00,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 817 [2020-10-26 21:00:00,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:00:00,694 INFO L225 Difference]: With dead ends: 5178 [2020-10-26 21:00:00,695 INFO L226 Difference]: Without dead ends: 3494 [2020-10-26 21:00:00,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-26 21:00:00,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3494 states. [2020-10-26 21:00:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3494 to 3438. [2020-10-26 21:00:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3438 states. [2020-10-26 21:00:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 5379 transitions. [2020-10-26 21:00:00,811 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 5379 transitions. Word has length 817 [2020-10-26 21:00:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:00:00,812 INFO L481 AbstractCegarLoop]: Abstraction has 3438 states and 5379 transitions. [2020-10-26 21:00:00,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:00:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 5379 transitions. [2020-10-26 21:00:00,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2020-10-26 21:00:00,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:00:00,828 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:00:00,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:00:00,829 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:00:00,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:00:00,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1559743433, now seen corresponding path program 1 times [2020-10-26 21:00:00,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:00:00,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559705115] [2020-10-26 21:00:00,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:00:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:00,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:01,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:05,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:05,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 858 [2020-10-26 21:00:05,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:00:05,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-26 21:00:05,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:05,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:00:05,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:00:05,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 21:00:05,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:00:06,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:00:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:06,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:06,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:06,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:00:06,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:00:06,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 21:00:06,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:06,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:00:06,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:00:06,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:00:06,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:00:06,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:00:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:06,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:06,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:06,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 21:00:06,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:00:06,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-26 21:00:06,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:06,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:00:06,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:00:06,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 21:00:06,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:00:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:00:06,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559705115] [2020-10-26 21:00:06,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:00:06,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 21:00:06,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910851702] [2020-10-26 21:00:06,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:00:06,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:00:06,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:00:06,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:00:06,907 INFO L87 Difference]: Start difference. First operand 3438 states and 5379 transitions. Second operand 8 states. [2020-10-26 21:00:07,299 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:00:26,057 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:00:26,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:00:26,222 INFO L93 Difference]: Finished difference Result 13920 states and 22623 transitions. [2020-10-26 21:00:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 21:00:26,227 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 840 [2020-10-26 21:00:26,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:00:26,288 INFO L225 Difference]: With dead ends: 13920 [2020-10-26 21:00:26,288 INFO L226 Difference]: Without dead ends: 10488 [2020-10-26 21:00:26,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 21:00:26,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10488 states. [2020-10-26 21:00:26,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10488 to 10443. [2020-10-26 21:00:26,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10443 states. [2020-10-26 21:00:26,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10443 states to 10443 states and 15337 transitions. [2020-10-26 21:00:26,640 INFO L78 Accepts]: Start accepts. Automaton has 10443 states and 15337 transitions. Word has length 840 [2020-10-26 21:00:26,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:00:26,641 INFO L481 AbstractCegarLoop]: Abstraction has 10443 states and 15337 transitions. [2020-10-26 21:00:26,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:00:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand 10443 states and 15337 transitions. [2020-10-26 21:00:26,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1142 [2020-10-26 21:00:26,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:00:26,687 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 21:00:26,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:00:26,687 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:00:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:00:26,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2040193170, now seen corresponding path program 1 times [2020-10-26 21:00:26,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:00:26,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890928938] [2020-10-26 21:00:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:00:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:26,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:26,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:26,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:27,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:28,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:31,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:31,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1167 [2020-10-26 21:00:31,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 21:00:31,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5154 [2020-10-26 21:00:31,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:31,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:00:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:00:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 21:00:31,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:00:32,253 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:00:32,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:00:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:32,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:32,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:32,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:00:32,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:00:32,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 21:00:32,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:32,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:00:32,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:00:32,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:00:32,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 21:00:32,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:00:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:32,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:32,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:32,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 21:00:32,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:00:32,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 21:00:32,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:32,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:00:32,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:00:32,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 21:00:32,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:00:32,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 21:00:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:32,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:32,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:32,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 21:00:32,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:00:32,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 21:00:32,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:32,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:00:32,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 21:00:32,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:00:32,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:00:32,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 21:00:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:32,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:32,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:32,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-26 21:00:32,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:00:32,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 21:00:32,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:00:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-26 21:00:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:00:32,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:00:32,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 21:00:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:32,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:32,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:32,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-26 21:00:32,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:00:32,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-26 21:00:32,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:32,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:00:32,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 286 [2020-10-26 21:00:32,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:00:32,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:00:32,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-10-26 21:00:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:32,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:32,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:32,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 21:00:32,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:00:32,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 21:00:32,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:32,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:00:32,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:00:32,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:00:32,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:00:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 317 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-10-26 21:00:33,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890928938] [2020-10-26 21:00:33,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:00:33,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 21:00:33,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080906251] [2020-10-26 21:00:33,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:00:33,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:00:33,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:00:33,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:00:33,591 INFO L87 Difference]: Start difference. First operand 10443 states and 15337 transitions. Second operand 8 states. [2020-10-26 21:00:33,724 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-26 21:00:41,108 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-26 21:00:48,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:00:48,013 INFO L93 Difference]: Finished difference Result 28851 states and 43416 transitions. [2020-10-26 21:00:48,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:00:48,018 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1141 [2020-10-26 21:00:48,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:00:48,114 INFO L225 Difference]: With dead ends: 28851 [2020-10-26 21:00:48,114 INFO L226 Difference]: Without dead ends: 18414 [2020-10-26 21:00:48,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-26 21:00:48,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18414 states. [2020-10-26 21:00:48,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18414 to 18323. [2020-10-26 21:00:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18323 states. [2020-10-26 21:00:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18323 states to 18323 states and 26046 transitions. [2020-10-26 21:00:48,724 INFO L78 Accepts]: Start accepts. Automaton has 18323 states and 26046 transitions. Word has length 1141 [2020-10-26 21:00:48,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:00:48,724 INFO L481 AbstractCegarLoop]: Abstraction has 18323 states and 26046 transitions. [2020-10-26 21:00:48,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:00:48,725 INFO L276 IsEmpty]: Start isEmpty. Operand 18323 states and 26046 transitions. [2020-10-26 21:00:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1142 [2020-10-26 21:00:48,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:00:48,803 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 21:00:48,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 21:00:48,804 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:00:48,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:00:48,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1206723428, now seen corresponding path program 1 times [2020-10-26 21:00:48,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:00:48,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938124755] [2020-10-26 21:00:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:00:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:48,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:48,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:49,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:50,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:54,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:54,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1165 [2020-10-26 21:00:54,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 21:00:54,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-26 21:00:54,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:54,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 21:00:54,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:00:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 341 [2020-10-26 21:00:54,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:00:54,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:00:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:54,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:54,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:54,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:00:54,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:00:54,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 21:00:54,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:54,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:00:54,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:00:54,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:00:54,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:00:54,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:00:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:54,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:54,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:54,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:54,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 21:00:54,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:00:54,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 21:00:54,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:54,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:00:54,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:00:54,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 21:00:54,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:00:54,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 21:00:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:54,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:54,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:54,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:54,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-26 21:00:54,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:00:54,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 21:00:54,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:54,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:00:54,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:00:54,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 21:00:54,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:00:54,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 21:00:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:54,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:55,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:55,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-26 21:00:55,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:00:55,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 758 [2020-10-26 21:00:55,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:55,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:00:55,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:00:55,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 289 [2020-10-26 21:00:55,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:00:55,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-10-26 21:00:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:00:55,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:00:55,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:00:55,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 21:00:55,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:00:55,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-26 21:00:55,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:00:55,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 21:00:55,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:00:55,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 21:00:55,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:00:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 335 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-26 21:00:56,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938124755] [2020-10-26 21:00:56,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:00:56,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:00:56,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705880754] [2020-10-26 21:00:56,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:00:56,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:00:56,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:00:56,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:00:56,811 INFO L87 Difference]: Start difference. First operand 18323 states and 26046 transitions. Second operand 8 states. [2020-10-26 21:01:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:01:10,396 INFO L93 Difference]: Finished difference Result 43999 states and 65743 transitions. [2020-10-26 21:01:10,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:01:10,398 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1141 [2020-10-26 21:01:10,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:01:10,511 INFO L225 Difference]: With dead ends: 43999 [2020-10-26 21:01:10,512 INFO L226 Difference]: Without dead ends: 25682 [2020-10-26 21:01:10,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-26 21:01:10,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25682 states. [2020-10-26 21:01:11,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25682 to 25525. [2020-10-26 21:01:11,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25525 states. [2020-10-26 21:01:11,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25525 states to 25525 states and 34794 transitions. [2020-10-26 21:01:11,372 INFO L78 Accepts]: Start accepts. Automaton has 25525 states and 34794 transitions. Word has length 1141 [2020-10-26 21:01:11,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:01:11,374 INFO L481 AbstractCegarLoop]: Abstraction has 25525 states and 34794 transitions. [2020-10-26 21:01:11,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:01:11,374 INFO L276 IsEmpty]: Start isEmpty. Operand 25525 states and 34794 transitions. [2020-10-26 21:01:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1143 [2020-10-26 21:01:11,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:01:11,473 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 21:01:11,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 21:01:11,474 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:01:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:01:11,475 INFO L82 PathProgramCache]: Analyzing trace with hash -877937219, now seen corresponding path program 1 times [2020-10-26 21:01:11,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:01:11,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250799314] [2020-10-26 21:01:11,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:01:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:01:11,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:11,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:12,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:16,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:01:16,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1166 [2020-10-26 21:01:16,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:01:16,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-10-26 21:01:16,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:01:16,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:01:16,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-26 21:01:16,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 21:01:16,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:01:16,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:01:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:01:16,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:16,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:01:16,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:01:16,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:01:16,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 21:01:16,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:01:16,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:01:16,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:01:16,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:01:16,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:01:16,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:01:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:01:16,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:16,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:01:16,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 21:01:16,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:01:16,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 21:01:16,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:01:16,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:01:16,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:01:16,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 21:01:16,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:01:16,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 21:01:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:01:16,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:17,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:01:17,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 21:01:17,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:01:17,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 21:01:17,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:01:17,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:01:17,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:01:17,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 21:01:17,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:01:17,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 21:01:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:01:17,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:17,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:01:17,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-26 21:01:17,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:01:17,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-26 21:01:17,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:01:17,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:01:17,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 286 [2020-10-26 21:01:17,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:01:17,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:01:17,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-10-26 21:01:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:01:17,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:17,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:01:17,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 21:01:17,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:01:17,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 21:01:17,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:01:17,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:01:17,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:01:17,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:01:17,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:01:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 343 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 21:01:17,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250799314] [2020-10-26 21:01:17,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:01:17,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:01:17,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066076287] [2020-10-26 21:01:17,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:01:17,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:01:17,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:01:17,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:01:17,956 INFO L87 Difference]: Start difference. First operand 25525 states and 34794 transitions. Second operand 7 states. [2020-10-26 21:01:25,454 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:01:31,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:01:31,946 INFO L93 Difference]: Finished difference Result 56323 states and 79774 transitions. [2020-10-26 21:01:31,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 21:01:31,947 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1142 [2020-10-26 21:01:31,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:01:32,057 INFO L225 Difference]: With dead ends: 56323 [2020-10-26 21:01:32,057 INFO L226 Difference]: Without dead ends: 30804 [2020-10-26 21:01:32,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:01:32,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30804 states. [2020-10-26 21:01:32,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30804 to 30713. [2020-10-26 21:01:32,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30713 states. [2020-10-26 21:01:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30713 states to 30713 states and 40974 transitions. [2020-10-26 21:01:32,896 INFO L78 Accepts]: Start accepts. Automaton has 30713 states and 40974 transitions. Word has length 1142 [2020-10-26 21:01:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:01:32,897 INFO L481 AbstractCegarLoop]: Abstraction has 30713 states and 40974 transitions. [2020-10-26 21:01:32,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:01:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 30713 states and 40974 transitions. [2020-10-26 21:01:32,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1222 [2020-10-26 21:01:32,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:01:32,987 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 21:01:32,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 21:01:32,988 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:01:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:01:32,989 INFO L82 PathProgramCache]: Analyzing trace with hash -12868736, now seen corresponding path program 1 times [2020-10-26 21:01:32,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:01:32,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753490119] [2020-10-26 21:01:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:01:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:01:33,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:33,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:37,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:38,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:01:38,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1243 [2020-10-26 21:01:38,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:01:38,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-26 21:01:38,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:01:38,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 21:01:38,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-26 21:01:38,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 395 [2020-10-26 21:01:38,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:01:38,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:01:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:01:38,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:38,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:01:38,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:01:38,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:01:38,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 21:01:38,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:01:38,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:01:38,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:01:38,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:01:38,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:01:38,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:01:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:01:38,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:38,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:01:38,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 21:01:38,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:01:38,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 21:01:38,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:01:38,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:01:38,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:01:38,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 21:01:38,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 21:01:38,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 21:01:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:01:39,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:39,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:41,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:01:41,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 396 [2020-10-26 21:01:41,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:01:41,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2607 [2020-10-26 21:01:41,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:01:41,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:01:41,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:01:41,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 396 [2020-10-26 21:01:41,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:01:41,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-10-26 21:01:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:01:41,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:42,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:01:42,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-26 21:01:42,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:01:42,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-26 21:01:42,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:01:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 21:01:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:01:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-26 21:01:42,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:01:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 419 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 21:01:43,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753490119] [2020-10-26 21:01:43,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:01:43,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 21:01:43,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181556471] [2020-10-26 21:01:43,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:01:43,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:01:43,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:01:43,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:01:43,061 INFO L87 Difference]: Start difference. First operand 30713 states and 40974 transitions. Second operand 8 states. [2020-10-26 21:01:43,412 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-26 21:01:56,799 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:02:04,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:02:04,806 INFO L93 Difference]: Finished difference Result 83979 states and 119352 transitions. [2020-10-26 21:02:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 21:02:04,806 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1221 [2020-10-26 21:02:04,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:02:05,032 INFO L225 Difference]: With dead ends: 83979 [2020-10-26 21:02:05,032 INFO L226 Difference]: Without dead ends: 53272 [2020-10-26 21:02:05,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-26 21:02:05,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53272 states. [2020-10-26 21:02:06,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53272 to 52759. [2020-10-26 21:02:06,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52759 states. [2020-10-26 21:02:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52759 states to 52759 states and 69177 transitions. [2020-10-26 21:02:07,208 INFO L78 Accepts]: Start accepts. Automaton has 52759 states and 69177 transitions. Word has length 1221 [2020-10-26 21:02:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:02:07,209 INFO L481 AbstractCegarLoop]: Abstraction has 52759 states and 69177 transitions. [2020-10-26 21:02:07,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:02:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 52759 states and 69177 transitions. [2020-10-26 21:02:07,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1285 [2020-10-26 21:02:07,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:02:07,338 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 21:02:07,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 21:02:07,339 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:02:07,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:02:07,340 INFO L82 PathProgramCache]: Analyzing trace with hash -408737503, now seen corresponding path program 1 times [2020-10-26 21:02:07,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:02:07,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509316886] [2020-10-26 21:02:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:02:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:07,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:07,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:08,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:08,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:09,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:12,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:12,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1310 [2020-10-26 21:02:12,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 21:02:12,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-26 21:02:12,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:02:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:02:12,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 21:02:12,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:13,142 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:02:13,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:02:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:13,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:13,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:13,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:02:13,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:02:13,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 21:02:13,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:02:13,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:02:13,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:02:13,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:02:13,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:02:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:13,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:13,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:13,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:13,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 21:02:13,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:02:13,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-26 21:02:13,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:13,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:02:13,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:02:13,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 21:02:13,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:02:13,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 21:02:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:13,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:13,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:13,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 21:02:13,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:02:13,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 21:02:13,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:13,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:02:13,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:02:13,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 21:02:13,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:02:13,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 21:02:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:13,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:13,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:13,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 21:02:13,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:02:13,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 21:02:13,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:02:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-26 21:02:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:02:13,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:13,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-26 21:02:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:13,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:13,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:13,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 396 [2020-10-26 21:02:13,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:02:13,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-26 21:02:13,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:13,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:02:13,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 393 [2020-10-26 21:02:13,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:02:13,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:14,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-10-26 21:02:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:14,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:14,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:14,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-26 21:02:14,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:02:14,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 21:02:14,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:14,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:02:14,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:02:14,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:02:14,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 470 proven. 50 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-26 21:02:15,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509316886] [2020-10-26 21:02:15,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:02:15,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 21:02:15,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712386217] [2020-10-26 21:02:15,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:02:15,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:02:15,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:02:15,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:02:15,036 INFO L87 Difference]: Start difference. First operand 52759 states and 69177 transitions. Second operand 8 states. [2020-10-26 21:02:15,170 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-26 21:02:16,826 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-26 21:02:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:02:28,824 INFO L93 Difference]: Finished difference Result 119274 states and 157027 transitions. [2020-10-26 21:02:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 21:02:28,825 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1284 [2020-10-26 21:02:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:02:29,197 INFO L225 Difference]: With dead ends: 119274 [2020-10-26 21:02:29,197 INFO L226 Difference]: Without dead ends: 66557 [2020-10-26 21:02:29,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-26 21:02:29,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66557 states. [2020-10-26 21:02:30,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66557 to 66384. [2020-10-26 21:02:30,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66384 states. [2020-10-26 21:02:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66384 states to 66384 states and 85414 transitions. [2020-10-26 21:02:30,874 INFO L78 Accepts]: Start accepts. Automaton has 66384 states and 85414 transitions. Word has length 1284 [2020-10-26 21:02:30,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:02:30,874 INFO L481 AbstractCegarLoop]: Abstraction has 66384 states and 85414 transitions. [2020-10-26 21:02:30,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:02:30,874 INFO L276 IsEmpty]: Start isEmpty. Operand 66384 states and 85414 transitions. [2020-10-26 21:02:30,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1287 [2020-10-26 21:02:30,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:02:30,989 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 21:02:30,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 21:02:30,989 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:02:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:02:30,990 INFO L82 PathProgramCache]: Analyzing trace with hash -130607323, now seen corresponding path program 1 times [2020-10-26 21:02:30,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:02:30,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624627384] [2020-10-26 21:02:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:02:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:31,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:31,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:32,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:36,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:36,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1312 [2020-10-26 21:02:36,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:02:36,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-26 21:02:36,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:36,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:02:36,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-26 21:02:36,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 21:02:36,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:37,031 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:02:37,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:02:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:37,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:37,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:37,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:02:37,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:02:37,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 21:02:37,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:37,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:02:37,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:02:37,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:02:37,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:37,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:02:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:37,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:37,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:37,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 21:02:37,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:02:37,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 21:02:37,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:37,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:02:37,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:02:37,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:02:37,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:37,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 21:02:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:37,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:37,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:37,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 21:02:37,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:02:37,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 21:02:37,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:37,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:02:37,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:02:37,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 21:02:37,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:37,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 21:02:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:37,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:37,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:37,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 21:02:37,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:02:37,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 21:02:37,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:37,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:02:37,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:02:37,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 21:02:37,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:37,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-10-26 21:02:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:37,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:37,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:37,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 396 [2020-10-26 21:02:37,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:02:37,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-26 21:02:37,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:37,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:02:37,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 393 [2020-10-26 21:02:37,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:02:37,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:37,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-10-26 21:02:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:37,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:37,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:37,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-26 21:02:37,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:02:37,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 21:02:37,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:37,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:02:37,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:02:37,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:02:37,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 505 proven. 47 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-26 21:02:38,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624627384] [2020-10-26 21:02:38,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:02:38,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 21:02:38,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970482791] [2020-10-26 21:02:38,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:02:38,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:02:38,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:02:38,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:02:38,750 INFO L87 Difference]: Start difference. First operand 66384 states and 85414 transitions. Second operand 8 states. [2020-10-26 21:02:39,086 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-26 21:02:39,450 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 93