/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:38:06,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:38:06,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:38:06,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:38:06,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:38:06,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:38:06,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:38:06,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:38:06,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:38:06,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:38:06,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:38:06,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:38:06,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:38:06,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:38:06,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:38:06,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:38:06,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:38:06,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:38:06,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:38:06,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:38:06,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:38:06,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:38:06,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:38:06,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:38:06,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:38:06,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:38:06,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:38:06,624 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:38:06,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:38:06,626 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:38:06,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:38:06,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:38:06,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:38:06,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:38:06,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:38:06,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:38:06,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:38:06,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:38:06,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:38:06,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:38:06,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:38:06,636 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 [2020-10-28 10:38:06,664 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:38:06,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:38:06,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:38:06,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:38:06,666 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:38:06,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:38:06,667 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:38:06,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:38:06,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:38:06,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:38:06,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:38:06,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:38:06,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:38:06,668 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:38:06,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:38:06,669 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:38:06,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:38:06,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:38:06,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:38:06,670 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:38:06,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:38:06,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:38:06,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:38:06,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:38:06,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:38:06,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:38:06,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:38:06,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:38:06,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:38:06,672 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:38:07,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:38:07,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:38:07,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:38:07,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:38:07,079 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:38:07,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label59.c [2020-10-28 10:38:07,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b783cb13/b997b95fa7714c90ad05e17e2b23d28e/FLAG08798b0f5 [2020-10-28 10:38:08,180 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:38:08,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label59.c [2020-10-28 10:38:08,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b783cb13/b997b95fa7714c90ad05e17e2b23d28e/FLAG08798b0f5 [2020-10-28 10:38:08,240 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b783cb13/b997b95fa7714c90ad05e17e2b23d28e [2020-10-28 10:38:08,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:38:08,253 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:38:08,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:38:08,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:38:08,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:38:08,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:38:08" (1/1) ... [2020-10-28 10:38:08,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b70a1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:08, skipping insertion in model container [2020-10-28 10:38:08,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:38:08" (1/1) ... [2020-10-28 10:38:08,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:38:08,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:38:09,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:38:09,767 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:38:10,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:38:10,605 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:38:10,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:10 WrapperNode [2020-10-28 10:38:10,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:38:10,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:38:10,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:38:10,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:38:10,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:10" (1/1) ... [2020-10-28 10:38:10,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:10" (1/1) ... [2020-10-28 10:38:10,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:10" (1/1) ... [2020-10-28 10:38:10,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:10" (1/1) ... [2020-10-28 10:38:10,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:10" (1/1) ... [2020-10-28 10:38:10,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:10" (1/1) ... [2020-10-28 10:38:10,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:10" (1/1) ... [2020-10-28 10:38:11,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:38:11,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:38:11,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:38:11,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:38:11,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:10" (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 [2020-10-28 10:38:11,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:38:11,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:38:11,125 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:38:11,125 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:38:11,125 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 10:38:11,125 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 10:38:11,126 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 10:38:11,126 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:38:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:38:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 10:38:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 10:38:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 10:38:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:38:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:38:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:38:11,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:38:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:38:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:38:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:38:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:38:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:38:11,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:38:11,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:38:11,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:38:11,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:38:16,831 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:38:16,831 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:38:16,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:38:16 BoogieIcfgContainer [2020-10-28 10:38:16,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:38:16,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:38:16,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:38:16,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:38:16,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:38:08" (1/3) ... [2020-10-28 10:38:16,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26eaa1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:38:16, skipping insertion in model container [2020-10-28 10:38:16,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:10" (2/3) ... [2020-10-28 10:38:16,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26eaa1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:38:16, skipping insertion in model container [2020-10-28 10:38:16,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:38:16" (3/3) ... [2020-10-28 10:38:16,844 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label59.c [2020-10-28 10:38:16,857 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:38:16,863 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:38:16,877 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:38:16,912 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:38:16,912 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:38:16,912 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:38:16,912 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:38:16,912 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:38:16,913 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:38:16,913 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:38:16,913 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:38:16,950 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-28 10:38:17,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 804 [2020-10-28 10:38:17,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:38:17,005 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] [2020-10-28 10:38:17,006 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:38:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:38:17,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1629783080, now seen corresponding path program 1 times [2020-10-28 10:38:17,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:38:17,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260967611] [2020-10-28 10:38:17,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:38:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:18,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:21,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:22,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:22,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 819 [2020-10-28 10:38:22,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:38:22,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 10:38:22,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:22,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:22,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 10:38:22,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:38:22,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 810 [2020-10-28 10:38:22,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 10:38:23,716 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:38:23,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:38:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:23,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:23,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:23,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:38:23,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:23,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 10:38:23,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:23,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:23,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:38:23,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:23,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:38:23,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:38:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:38:24,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260967611] [2020-10-28 10:38:24,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:38:24,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:38:24,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598757553] [2020-10-28 10:38:24,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:38:24,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:38:24,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:38:24,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:38:24,554 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 4 states. [2020-10-28 10:38:24,820 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:38:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:38:33,980 INFO L93 Difference]: Finished difference Result 2677 states and 5144 transitions. [2020-10-28 10:38:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:38:33,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 803 [2020-10-28 10:38:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:38:34,025 INFO L225 Difference]: With dead ends: 2677 [2020-10-28 10:38:34,025 INFO L226 Difference]: Without dead ends: 1703 [2020-10-28 10:38:34,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:38:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-28 10:38:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1688. [2020-10-28 10:38:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1688 states. [2020-10-28 10:38:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2956 transitions. [2020-10-28 10:38:34,189 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2956 transitions. Word has length 803 [2020-10-28 10:38:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:38:34,192 INFO L481 AbstractCegarLoop]: Abstraction has 1688 states and 2956 transitions. [2020-10-28 10:38:34,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:38:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2956 transitions. [2020-10-28 10:38:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2020-10-28 10:38:34,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:38:34,228 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:38:34,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:38:34,229 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:38:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:38:34,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1918713107, now seen corresponding path program 1 times [2020-10-28 10:38:34,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:38:34,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838303423] [2020-10-28 10:38:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:38:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:34,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:34,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:39,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:39,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 830 [2020-10-28 10:38:39,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:38:39,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 10:38:39,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:39,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:39,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:38:39,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:38:39,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 10:38:39,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 10:38:39,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:38:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:39,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:39,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:39,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:38:39,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:39,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 10:38:39,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:39,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:39,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:38:39,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:39,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:38:39,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:39,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:38:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:39,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:39,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:39,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:38:39,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:39,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 10:38:39,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:39,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:39,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:38:39,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:38:39,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 10:38:39,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:38:40,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838303423] [2020-10-28 10:38:40,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:38:40,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 10:38:40,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644148887] [2020-10-28 10:38:40,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:38:40,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:38:40,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:38:40,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:38:40,376 INFO L87 Difference]: Start difference. First operand 1688 states and 2956 transitions. Second operand 8 states. [2020-10-28 10:38:40,567 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:38:52,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:38:52,591 INFO L93 Difference]: Finished difference Result 5157 states and 9094 transitions. [2020-10-28 10:38:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:38:52,593 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 812 [2020-10-28 10:38:52,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:38:52,622 INFO L225 Difference]: With dead ends: 5157 [2020-10-28 10:38:52,622 INFO L226 Difference]: Without dead ends: 3475 [2020-10-28 10:38:52,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 10:38:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2020-10-28 10:38:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 3422. [2020-10-28 10:38:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3422 states. [2020-10-28 10:38:52,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 5719 transitions. [2020-10-28 10:38:52,794 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 5719 transitions. Word has length 812 [2020-10-28 10:38:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:38:52,795 INFO L481 AbstractCegarLoop]: Abstraction has 3422 states and 5719 transitions. [2020-10-28 10:38:52,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:38:52,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 5719 transitions. [2020-10-28 10:38:52,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2020-10-28 10:38:52,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:38:52,833 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:38:52,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:38:52,834 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:38:52,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:38:52,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1949507494, now seen corresponding path program 1 times [2020-10-28 10:38:52,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:38:52,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905525073] [2020-10-28 10:38:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:38:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:52,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:54,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:56,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:58,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:58,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 831 [2020-10-28 10:38:58,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:38:58,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-28 10:38:58,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:58,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:58,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:38:58,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:38:58,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:38:58,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:58,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:38:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:58,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:58,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:58,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:38:58,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:58,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:38:58,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:58,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:58,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:38:58,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:58,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:38:58,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:58,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:38:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:58,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:58,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:58,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:38:58,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:58,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 10:38:58,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:58,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:58,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:38:58,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:38:58,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 10:38:58,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:38:58,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905525073] [2020-10-28 10:38:58,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:38:58,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:38:58,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301896303] [2020-10-28 10:38:58,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:38:58,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:38:58,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:38:58,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:38:58,686 INFO L87 Difference]: Start difference. First operand 3422 states and 5719 transitions. Second operand 7 states. [2020-10-28 10:39:09,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:39:09,919 INFO L93 Difference]: Finished difference Result 8675 states and 14529 transitions. [2020-10-28 10:39:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:39:09,926 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 813 [2020-10-28 10:39:09,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:39:09,958 INFO L225 Difference]: With dead ends: 8675 [2020-10-28 10:39:09,958 INFO L226 Difference]: Without dead ends: 5259 [2020-10-28 10:39:09,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:39:09,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2020-10-28 10:39:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 5217. [2020-10-28 10:39:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5217 states. [2020-10-28 10:39:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5217 states to 5217 states and 7918 transitions. [2020-10-28 10:39:10,183 INFO L78 Accepts]: Start accepts. Automaton has 5217 states and 7918 transitions. Word has length 813 [2020-10-28 10:39:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:39:10,183 INFO L481 AbstractCegarLoop]: Abstraction has 5217 states and 7918 transitions. [2020-10-28 10:39:10,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:39:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 5217 states and 7918 transitions. [2020-10-28 10:39:10,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2020-10-28 10:39:10,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:39:10,202 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:39:10,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:39:10,203 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:39:10,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:39:10,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1939281399, now seen corresponding path program 1 times [2020-10-28 10:39:10,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:39:10,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307225992] [2020-10-28 10:39:10,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:39:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:10,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:11,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:12,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:15,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:15,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 832 [2020-10-28 10:39:15,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:39:15,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5155 [2020-10-28 10:39:15,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:15,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:15,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:39:15,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:39:15,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 10:39:15,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:15,723 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:39:15,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:39:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:15,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:15,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:15,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:39:15,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:15,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 10:39:15,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:15,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:15,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:39:15,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:15,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:39:15,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:39:15,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:39:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:15,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:15,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:15,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 10:39:15,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:15,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:39:15,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:15,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:15,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:39:15,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:39:15,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 10:39:15,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:39:16,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307225992] [2020-10-28 10:39:16,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:39:16,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:39:16,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652989538] [2020-10-28 10:39:16,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:39:16,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:39:16,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:39:16,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:39:16,160 INFO L87 Difference]: Start difference. First operand 5217 states and 7918 transitions. Second operand 7 states. [2020-10-28 10:39:28,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:39:28,246 INFO L93 Difference]: Finished difference Result 15939 states and 25059 transitions. [2020-10-28 10:39:28,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:39:28,246 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 814 [2020-10-28 10:39:28,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:39:28,302 INFO L225 Difference]: With dead ends: 15939 [2020-10-28 10:39:28,302 INFO L226 Difference]: Without dead ends: 10728 [2020-10-28 10:39:28,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:39:28,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10728 states. [2020-10-28 10:39:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10728 to 10612. [2020-10-28 10:39:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10612 states. [2020-10-28 10:39:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10612 states to 10612 states and 14956 transitions. [2020-10-28 10:39:28,720 INFO L78 Accepts]: Start accepts. Automaton has 10612 states and 14956 transitions. Word has length 814 [2020-10-28 10:39:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:39:28,720 INFO L481 AbstractCegarLoop]: Abstraction has 10612 states and 14956 transitions. [2020-10-28 10:39:28,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:39:28,720 INFO L276 IsEmpty]: Start isEmpty. Operand 10612 states and 14956 transitions. [2020-10-28 10:39:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2020-10-28 10:39:28,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:39:28,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:39:28,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:39:28,759 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:39:28,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:39:28,760 INFO L82 PathProgramCache]: Analyzing trace with hash -113251961, now seen corresponding path program 1 times [2020-10-28 10:39:28,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:39:28,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780106181] [2020-10-28 10:39:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:39:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:29,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:29,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:34,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:34,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 840 [2020-10-28 10:39:34,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:39:34,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 10:39:34,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:34,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:34,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 10:39:34,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 10:39:34,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 807 [2020-10-28 10:39:34,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:34,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:39:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:34,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:34,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:34,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:39:34,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:34,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:39:34,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:34,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:34,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:39:34,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:34,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:39:34,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:34,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:39:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:34,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:34,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:34,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:39:34,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:34,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 10:39:34,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:34,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:34,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:39:34,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:34,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:39:34,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:39:35,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780106181] [2020-10-28 10:39:35,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:39:35,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 10:39:35,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589062814] [2020-10-28 10:39:35,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 10:39:35,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:39:35,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 10:39:35,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:39:35,597 INFO L87 Difference]: Start difference. First operand 10612 states and 14956 transitions. Second operand 6 states. [2020-10-28 10:39:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:39:50,227 INFO L93 Difference]: Finished difference Result 21232 states and 30150 transitions. [2020-10-28 10:39:50,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:39:50,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 822 [2020-10-28 10:39:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:39:50,270 INFO L225 Difference]: With dead ends: 21232 [2020-10-28 10:39:50,271 INFO L226 Difference]: Without dead ends: 10626 [2020-10-28 10:39:50,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:39:50,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10626 states. [2020-10-28 10:39:50,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10626 to 10605. [2020-10-28 10:39:50,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10605 states. [2020-10-28 10:39:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10605 states to 10605 states and 13608 transitions. [2020-10-28 10:39:50,529 INFO L78 Accepts]: Start accepts. Automaton has 10605 states and 13608 transitions. Word has length 822 [2020-10-28 10:39:50,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:39:50,531 INFO L481 AbstractCegarLoop]: Abstraction has 10605 states and 13608 transitions. [2020-10-28 10:39:50,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 10:39:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 10605 states and 13608 transitions. [2020-10-28 10:39:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 830 [2020-10-28 10:39:50,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:39:50,565 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:39:50,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:39:50,566 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:39:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:39:50,567 INFO L82 PathProgramCache]: Analyzing trace with hash -877896326, now seen corresponding path program 1 times [2020-10-28 10:39:50,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:39:50,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385100352] [2020-10-28 10:39:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:39:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:50,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:51,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:55,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:55,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 847 [2020-10-28 10:39:55,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:39:55,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 10:39:55,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:55,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:55,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 10:39:55,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 10:39:55,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 807 [2020-10-28 10:39:55,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:39:56,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:39:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:56,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:56,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:56,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:39:56,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:56,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:39:56,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:56,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:56,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:39:56,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:56,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:39:56,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:56,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:39:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:56,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:56,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:56,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 10:39:56,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:56,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 10:39:56,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:56,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:56,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:39:56,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:56,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 10:39:56,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:39:57,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385100352] [2020-10-28 10:39:57,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:39:57,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:39:57,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442701379] [2020-10-28 10:39:57,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:39:57,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:39:57,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:39:57,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:39:57,017 INFO L87 Difference]: Start difference. First operand 10605 states and 13608 transitions. Second operand 5 states. [2020-10-28 10:40:08,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:40:08,368 INFO L93 Difference]: Finished difference Result 31519 states and 41398 transitions. [2020-10-28 10:40:08,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:40:08,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 829 [2020-10-28 10:40:08,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:40:08,459 INFO L225 Difference]: With dead ends: 31519 [2020-10-28 10:40:08,459 INFO L226 Difference]: Without dead ends: 20920 [2020-10-28 10:40:08,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:40:08,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20920 states. [2020-10-28 10:40:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20920 to 20914. [2020-10-28 10:40:08,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20914 states. [2020-10-28 10:40:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20914 states to 20914 states and 26911 transitions. [2020-10-28 10:40:08,974 INFO L78 Accepts]: Start accepts. Automaton has 20914 states and 26911 transitions. Word has length 829 [2020-10-28 10:40:08,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:40:08,977 INFO L481 AbstractCegarLoop]: Abstraction has 20914 states and 26911 transitions. [2020-10-28 10:40:08,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:40:08,977 INFO L276 IsEmpty]: Start isEmpty. Operand 20914 states and 26911 transitions. [2020-10-28 10:40:09,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 854 [2020-10-28 10:40:09,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:40:09,045 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:40:09,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:40:09,046 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:40:09,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:40:09,046 INFO L82 PathProgramCache]: Analyzing trace with hash 858937642, now seen corresponding path program 1 times [2020-10-28 10:40:09,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:40:09,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017049743] [2020-10-28 10:40:09,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:40:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:09,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:09,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:14,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:14,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 871 [2020-10-28 10:40:14,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:40:14,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-28 10:40:14,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:14,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:14,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:40:14,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:40:14,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 10:40:14,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:14,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:40:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:14,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:14,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:14,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:40:14,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:14,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:40:14,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:14,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:14,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:40:14,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:40:14,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:40:14,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:14,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:40:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:14,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:14,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:14,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 10:40:14,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:14,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 10:40:14,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:14,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:14,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:40:14,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:40:14,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 10:40:14,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:40:14,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017049743] [2020-10-28 10:40:14,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:40:14,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:40:14,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264060578] [2020-10-28 10:40:14,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:40:14,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:40:14,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:40:14,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:40:14,975 INFO L87 Difference]: Start difference. First operand 20914 states and 26911 transitions. Second operand 7 states. [2020-10-28 10:40:27,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:40:27,984 INFO L93 Difference]: Finished difference Result 61607 states and 82498 transitions. [2020-10-28 10:40:27,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:40:27,984 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 853 [2020-10-28 10:40:27,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:40:28,138 INFO L225 Difference]: With dead ends: 61607 [2020-10-28 10:40:28,139 INFO L226 Difference]: Without dead ends: 40699 [2020-10-28 10:40:28,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:40:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40699 states. [2020-10-28 10:40:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40699 to 40583. [2020-10-28 10:40:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40583 states. [2020-10-28 10:40:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40583 states to 40583 states and 51584 transitions. [2020-10-28 10:40:29,126 INFO L78 Accepts]: Start accepts. Automaton has 40583 states and 51584 transitions. Word has length 853 [2020-10-28 10:40:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:40:29,127 INFO L481 AbstractCegarLoop]: Abstraction has 40583 states and 51584 transitions. [2020-10-28 10:40:29,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:40:29,127 INFO L276 IsEmpty]: Start isEmpty. Operand 40583 states and 51584 transitions. [2020-10-28 10:40:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 889 [2020-10-28 10:40:29,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:40:29,203 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:40:29,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 10:40:29,203 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:40:29,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:40:29,204 INFO L82 PathProgramCache]: Analyzing trace with hash 926129209, now seen corresponding path program 1 times [2020-10-28 10:40:29,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:40:29,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911295730] [2020-10-28 10:40:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:40:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:29,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:29,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:31,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:34,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:34,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 908 [2020-10-28 10:40:34,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:40:34,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 10:40:34,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:34,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:34,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:40:34,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 10:40:34,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 10:40:34,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:34,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:40:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:34,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:34,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:34,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:40:34,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:34,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 10:40:34,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:34,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:34,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:40:34,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:40:34,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:40:34,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:34,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:40:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:34,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:34,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:34,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:40:34,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:34,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 10:40:34,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:34,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:34,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:40:34,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:40:34,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:40:34,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:34,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:40:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:34,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:34,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:34,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 10:40:34,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:34,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-28 10:40:34,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:34,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:34,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:40:34,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:40:34,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 10:40:34,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:40:35,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911295730] [2020-10-28 10:40:35,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:40:35,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:40:35,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838344326] [2020-10-28 10:40:35,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:40:35,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:40:35,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:40:35,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:40:35,010 INFO L87 Difference]: Start difference. First operand 40583 states and 51584 transitions. Second operand 7 states. [2020-10-28 10:40:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:40:47,497 INFO L93 Difference]: Finished difference Result 81731 states and 105221 transitions. [2020-10-28 10:40:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:40:47,499 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 888 [2020-10-28 10:40:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:40:47,625 INFO L225 Difference]: With dead ends: 81731 [2020-10-28 10:40:47,626 INFO L226 Difference]: Without dead ends: 41154 [2020-10-28 10:40:47,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:40:47,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41154 states. [2020-10-28 10:40:48,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41154 to 40974. [2020-10-28 10:40:48,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40974 states. [2020-10-28 10:40:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40974 states to 40974 states and 50685 transitions. [2020-10-28 10:40:48,691 INFO L78 Accepts]: Start accepts. Automaton has 40974 states and 50685 transitions. Word has length 888 [2020-10-28 10:40:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:40:48,692 INFO L481 AbstractCegarLoop]: Abstraction has 40974 states and 50685 transitions. [2020-10-28 10:40:48,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:40:48,692 INFO L276 IsEmpty]: Start isEmpty. Operand 40974 states and 50685 transitions. [2020-10-28 10:40:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1005 [2020-10-28 10:40:48,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:40:48,773 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:40:48,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 10:40:48,773 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:40:48,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:40:48,774 INFO L82 PathProgramCache]: Analyzing trace with hash 336088983, now seen corresponding path program 1 times [2020-10-28 10:40:48,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:40:48,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079748200] [2020-10-28 10:40:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:40:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:48,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:48,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:49,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:53,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:53,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1026 [2020-10-28 10:40:53,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:40:53,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-28 10:40:53,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:53,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:53,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:40:53,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-28 10:40:53,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-28 10:40:53,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:54,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:40:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:54,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:54,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:54,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:40:54,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:54,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:40:54,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:54,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:54,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:40:54,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:40:54,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:40:54,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:54,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:40:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:54,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:54,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:54,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 10:40:54,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:54,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:40:54,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:54,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:54,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:40:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:40:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:40:54,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:54,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 10:40:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:54,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:54,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:54,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 10:40:54,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:54,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-28 10:40:54,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:54,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:54,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:40:54,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:40:54,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 10:40:54,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:54,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-28 10:40:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:54,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:54,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:54,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 10:40:54,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:54,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-28 10:40:54,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:54,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:54,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:40:54,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:40:54,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 10:40:54,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 279 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 10:40:55,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079748200] [2020-10-28 10:40:55,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:40:55,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:40:55,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788559788] [2020-10-28 10:40:55,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:40:55,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:40:55,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:40:55,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:40:55,309 INFO L87 Difference]: Start difference. First operand 40974 states and 50685 transitions. Second operand 8 states. [2020-10-28 10:41:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:41:18,902 INFO L93 Difference]: Finished difference Result 117505 states and 148332 transitions. [2020-10-28 10:41:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 10:41:18,903 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1004 [2020-10-28 10:41:18,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:41:19,126 INFO L225 Difference]: With dead ends: 117505 [2020-10-28 10:41:19,126 INFO L226 Difference]: Without dead ends: 76537 [2020-10-28 10:41:19,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 10:41:19,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76537 states. [2020-10-28 10:41:20,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76537 to 76475. [2020-10-28 10:41:20,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76475 states. [2020-10-28 10:41:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76475 states to 76475 states and 89798 transitions. [2020-10-28 10:41:20,819 INFO L78 Accepts]: Start accepts. Automaton has 76475 states and 89798 transitions. Word has length 1004 [2020-10-28 10:41:20,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:41:20,820 INFO L481 AbstractCegarLoop]: Abstraction has 76475 states and 89798 transitions. [2020-10-28 10:41:20,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:41:20,820 INFO L276 IsEmpty]: Start isEmpty. Operand 76475 states and 89798 transitions. [2020-10-28 10:41:21,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1093 [2020-10-28 10:41:21,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:41:21,548 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:41:21,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 10:41:21,549 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:41:21,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:41:21,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1102311663, now seen corresponding path program 1 times [2020-10-28 10:41:21,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:41:21,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337816598] [2020-10-28 10:41:21,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:41:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:22,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:22,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:22,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:22,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:27,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:27,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1116 [2020-10-28 10:41:27,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:41:27,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 10:41:27,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:27,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:27,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:41:27,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 188 [2020-10-28 10:41:27,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 10:41:27,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:41:27,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:41:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:27,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:27,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:27,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:41:27,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:41:27,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 10:41:27,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:27,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:27,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:41:27,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:41:27,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:41:27,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:41:27,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:41:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:27,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:27,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:27,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 10:41:27,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:41:27,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 10:41:27,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:27,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:27,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:41:27,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:41:27,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:41:27,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:41:27,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-28 10:41:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:27,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:27,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:27,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 10:41:27,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:41:27,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 10:41:27,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:27,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:27,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:41:27,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:41:27,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 10:41:27,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:41:27,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-10-28 10:41:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:27,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:27,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:27,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 10:41:27,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:41:27,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-28 10:41:27,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:27,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:27,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:41:27,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:41:27,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 10:41:27,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:41:27,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-10-28 10:41:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:27,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:27,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:27,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 10:41:27,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:41:27,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 10:41:27,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:27,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:27,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:41:27,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 10:41:27,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:41:27,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:41:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 373 proven. 54 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-28 10:41:28,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337816598] [2020-10-28 10:41:28,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:41:28,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:41:28,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238244294] [2020-10-28 10:41:28,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:41:28,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:41:28,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:41:28,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:41:28,434 INFO L87 Difference]: Start difference. First operand 76475 states and 89798 transitions. Second operand 7 states.