/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=DEEPEST --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/Problem05_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:12:31,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:12:31,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:12:31,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:12:31,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:12:31,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:12:31,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:12:31,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:12:31,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:12:31,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:12:31,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:12:31,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:12:31,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:12:31,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:12:31,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:12:31,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:12:31,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:12:31,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:12:31,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:12:31,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:12:31,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:12:31,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:12:31,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:12:31,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:12:31,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:12:31,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:12:31,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:12:31,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:12:31,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:12:31,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:12:31,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:12:31,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:12:31,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:12:31,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:12:31,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:12:31,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:12:31,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:12:31,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:12:31,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:12:31,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:12:31,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:12:31,152 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 16:12:31,184 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:12:31,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:12:31,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:12:31,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:12:31,187 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:12:31,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:12:31,189 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:12:31,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:12:31,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:12:31,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:12:31,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:12:31,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:12:31,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:12:31,190 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:12:31,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:12:31,191 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:12:31,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:12:31,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:12:31,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:12:31,192 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:12:31,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:12:31,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:12:31,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:12:31,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:12:31,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:12:31,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:12:31,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:12:31,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:12:31,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:12:31,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:12:31,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:12:31,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:12:31,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:12:31,628 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:12:31,629 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:12:31,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label23.c [2020-10-27 16:12:31,705 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cc8b53b9/1a4cf9b57b7243f4838ec7161246d73b/FLAGfff08e5ea [2020-10-27 16:12:33,049 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:12:33,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label23.c [2020-10-27 16:12:33,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cc8b53b9/1a4cf9b57b7243f4838ec7161246d73b/FLAGfff08e5ea [2020-10-27 16:12:33,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cc8b53b9/1a4cf9b57b7243f4838ec7161246d73b [2020-10-27 16:12:33,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:12:33,128 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:12:33,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:12:33,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:12:33,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:12:33,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:12:33" (1/1) ... [2020-10-27 16:12:33,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@646a79d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:12:33, skipping insertion in model container [2020-10-27 16:12:33,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:12:33" (1/1) ... [2020-10-27 16:12:33,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:12:33,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:12:35,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:12:35,582 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:12:36,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:12:36,881 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:12:36,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:12:36 WrapperNode [2020-10-27 16:12:36,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:12:36,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:12:36,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:12:36,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:12:36,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:12:36" (1/1) ... [2020-10-27 16:12:36,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:12:36" (1/1) ... [2020-10-27 16:12:37,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:12:36" (1/1) ... [2020-10-27 16:12:37,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:12:36" (1/1) ... [2020-10-27 16:12:37,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:12:36" (1/1) ... [2020-10-27 16:12:37,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:12:36" (1/1) ... [2020-10-27 16:12:37,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:12:36" (1/1) ... [2020-10-27 16:12:37,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:12:37,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:12:37,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:12:37,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:12:37,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:12:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:12:37,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:12:37,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:12:37,546 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:12:37,546 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:12:37,546 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:12:37,546 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:12:37,546 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:12:37,546 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 16:12:37,547 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 16:12:37,547 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2020-10-27 16:12:37,547 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2020-10-27 16:12:37,547 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:12:37,547 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:12:37,547 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:12:37,548 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:12:37,548 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:12:37,548 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 16:12:37,548 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 16:12:37,548 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2020-10-27 16:12:37,549 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2020-10-27 16:12:37,549 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:12:37,549 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:12:37,549 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:12:37,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:12:37,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:12:37,549 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:12:37,550 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:12:37,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:12:37,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:12:37,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:12:37,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:12:37,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:12:37,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:12:46,343 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:12:46,344 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:12:46,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:12:46 BoogieIcfgContainer [2020-10-27 16:12:46,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:12:46,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:12:46,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:12:46,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:12:46,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:12:33" (1/3) ... [2020-10-27 16:12:46,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1449987f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:12:46, skipping insertion in model container [2020-10-27 16:12:46,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:12:36" (2/3) ... [2020-10-27 16:12:46,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1449987f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:12:46, skipping insertion in model container [2020-10-27 16:12:46,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:12:46" (3/3) ... [2020-10-27 16:12:46,362 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label23.c [2020-10-27 16:12:46,374 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:12:46,380 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:12:46,394 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:12:46,439 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:12:46,440 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:12:46,440 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:12:46,440 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:12:46,440 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:12:46,440 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:12:46,440 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:12:46,441 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:12:46,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states. [2020-10-27 16:12:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1691 [2020-10-27 16:12:46,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:12:46,661 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:12:46,662 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:12:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:12:46,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1739260591, now seen corresponding path program 1 times [2020-10-27 16:12:46,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:12:46,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164383069] [2020-10-27 16:12:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:12:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:12:48,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:12:52,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:12:52,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1714 [2020-10-27 16:12:52,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:12:52,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-27 16:12:52,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:12:52,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 16:12:52,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:12:52,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1705 [2020-10-27 16:12:52,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 16:12:55,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:12:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:12:55,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:12:55,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:12:55,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:12:55,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:12:55,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 16:12:55,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:12:55,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:12:55,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:12:55,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:12:55,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:12:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:12:57,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164383069] [2020-10-27 16:12:57,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:12:57,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 16:12:57,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866361014] [2020-10-27 16:12:57,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 16:12:57,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:12:57,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 16:12:57,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 16:12:57,635 INFO L87 Difference]: Start difference. First operand 2226 states. Second operand 4 states. [2020-10-27 16:13:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:13:19,474 INFO L93 Difference]: Finished difference Result 6316 states and 11857 transitions. [2020-10-27 16:13:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:13:19,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1690 [2020-10-27 16:13:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:13:19,526 INFO L225 Difference]: With dead ends: 6316 [2020-10-27 16:13:19,527 INFO L226 Difference]: Without dead ends: 4026 [2020-10-27 16:13:19,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:13:19,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2020-10-27 16:13:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3997. [2020-10-27 16:13:19,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3997 states. [2020-10-27 16:13:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 6428 transitions. [2020-10-27 16:13:19,772 INFO L78 Accepts]: Start accepts. Automaton has 3997 states and 6428 transitions. Word has length 1690 [2020-10-27 16:13:19,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:13:19,778 INFO L481 AbstractCegarLoop]: Abstraction has 3997 states and 6428 transitions. [2020-10-27 16:13:19,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 16:13:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3997 states and 6428 transitions. [2020-10-27 16:13:19,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1700 [2020-10-27 16:13:19,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:13:19,916 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:13:19,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:13:19,917 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:13:19,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:13:19,919 INFO L82 PathProgramCache]: Analyzing trace with hash -641337941, now seen corresponding path program 1 times [2020-10-27 16:13:19,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:13:19,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045913902] [2020-10-27 16:13:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:13:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:13:20,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:13:22,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:13:25,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:13:25,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1725 [2020-10-27 16:13:25,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:13:25,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 16:13:25,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:13:25,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 16:13:25,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 16:13:25,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1702 [2020-10-27 16:13:25,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:13:26,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:13:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:13:26,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:13:26,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:13:26,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:13:26,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:13:26,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 16:13:26,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:13:26,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:13:26,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:13:26,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:13:26,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:13:26,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:13:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:13:26,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:13:26,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:13:26,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 16:13:26,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:13:26,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-27 16:13:26,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:13:26,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:13:26,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:13:26,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 16:13:26,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:13:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:13:29,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045913902] [2020-10-27 16:13:29,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:13:29,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:13:29,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273319946] [2020-10-27 16:13:29,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:13:29,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:13:29,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:13:29,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:13:29,213 INFO L87 Difference]: Start difference. First operand 3997 states and 6428 transitions. Second operand 5 states. [2020-10-27 16:13:54,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:13:54,613 INFO L93 Difference]: Finished difference Result 11640 states and 18924 transitions. [2020-10-27 16:13:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:13:54,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1699 [2020-10-27 16:13:54,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:13:54,660 INFO L225 Difference]: With dead ends: 11640 [2020-10-27 16:13:54,660 INFO L226 Difference]: Without dead ends: 7649 [2020-10-27 16:13:54,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:13:54,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7649 states. [2020-10-27 16:13:54,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7649 to 7571. [2020-10-27 16:13:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7571 states. [2020-10-27 16:13:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 10962 transitions. [2020-10-27 16:13:54,880 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 10962 transitions. Word has length 1699 [2020-10-27 16:13:54,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:13:54,883 INFO L481 AbstractCegarLoop]: Abstraction has 7571 states and 10962 transitions. [2020-10-27 16:13:54,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:13:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 10962 transitions. [2020-10-27 16:13:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1702 [2020-10-27 16:13:54,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:13:54,931 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:13:54,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:13:54,931 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:13:54,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:13:54,933 INFO L82 PathProgramCache]: Analyzing trace with hash 197611943, now seen corresponding path program 1 times [2020-10-27 16:13:54,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:13:54,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030779184] [2020-10-27 16:13:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:13:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:13:55,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:13:55,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:14:00,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:14:00,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1727 [2020-10-27 16:14:00,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:14:00,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-27 16:14:00,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:14:00,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 16:14:00,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 16:14:00,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1702 [2020-10-27 16:14:00,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:14:01,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:14:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:14:01,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:14:01,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:14:01,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:14:01,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:14:01,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 16:14:01,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:14:01,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:14:01,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:14:01,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:14:01,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:14:01,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:14:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:14:01,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:14:01,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:14:01,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 16:14:01,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:14:01,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 16:14:01,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:14:01,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:14:01,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:14:01,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 16:14:01,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:14:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:14:04,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030779184] [2020-10-27 16:14:04,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:14:04,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 16:14:04,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402610821] [2020-10-27 16:14:04,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 16:14:04,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:14:04,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 16:14:04,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:14:04,691 INFO L87 Difference]: Start difference. First operand 7571 states and 10962 transitions. Second operand 6 states. [2020-10-27 16:14:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:14:41,597 INFO L93 Difference]: Finished difference Result 29229 states and 43415 transitions. [2020-10-27 16:14:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 16:14:41,598 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1701 [2020-10-27 16:14:41,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:14:41,688 INFO L225 Difference]: With dead ends: 29229 [2020-10-27 16:14:41,688 INFO L226 Difference]: Without dead ends: 21664 [2020-10-27 16:14:41,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 16:14:41,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21664 states. [2020-10-27 16:14:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21664 to 21629. [2020-10-27 16:14:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21629 states. [2020-10-27 16:14:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21629 states to 21629 states and 29137 transitions. [2020-10-27 16:14:42,252 INFO L78 Accepts]: Start accepts. Automaton has 21629 states and 29137 transitions. Word has length 1701 [2020-10-27 16:14:42,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:14:42,258 INFO L481 AbstractCegarLoop]: Abstraction has 21629 states and 29137 transitions. [2020-10-27 16:14:42,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 16:14:42,258 INFO L276 IsEmpty]: Start isEmpty. Operand 21629 states and 29137 transitions. [2020-10-27 16:14:42,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1768 [2020-10-27 16:14:42,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:14:42,414 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:14:42,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:14:42,414 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:14:42,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:14:42,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1754015680, now seen corresponding path program 1 times [2020-10-27 16:14:42,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:14:42,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202441399] [2020-10-27 16:14:42,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:14:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:14:42,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:14:44,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:14:47,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:14:47,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1793 [2020-10-27 16:14:47,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:14:47,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5163 [2020-10-27 16:14:47,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:14:47,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 16:14:47,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 16:14:47,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1702 [2020-10-27 16:14:47,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:14:48,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:14:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:14:48,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:14:48,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:14:48,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:14:48,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:14:48,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 16:14:48,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:14:48,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:14:48,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:14:48,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:14:48,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:14:48,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:14:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:14:48,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:14:48,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:14:48,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 16:14:48,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:14:48,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 16:14:48,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:14:48,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:14:48,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:14:48,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 16:14:48,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:14:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:14:51,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202441399] [2020-10-27 16:14:51,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:14:51,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 16:14:51,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395717436] [2020-10-27 16:14:51,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 16:14:51,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:14:51,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 16:14:51,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:14:51,688 INFO L87 Difference]: Start difference. First operand 21629 states and 29137 transitions. Second operand 6 states. [2020-10-27 16:15:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:15:17,256 INFO L93 Difference]: Finished difference Result 53847 states and 75192 transitions. [2020-10-27 16:15:17,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:15:17,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1767 [2020-10-27 16:15:17,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:15:17,377 INFO L225 Difference]: With dead ends: 53847 [2020-10-27 16:15:17,377 INFO L226 Difference]: Without dead ends: 32224 [2020-10-27 16:15:17,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:15:17,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32224 states. [2020-10-27 16:15:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32224 to 32150. [2020-10-27 16:15:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32150 states. [2020-10-27 16:15:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32150 states to 32150 states and 45169 transitions. [2020-10-27 16:15:18,264 INFO L78 Accepts]: Start accepts. Automaton has 32150 states and 45169 transitions. Word has length 1767 [2020-10-27 16:15:18,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:15:18,266 INFO L481 AbstractCegarLoop]: Abstraction has 32150 states and 45169 transitions. [2020-10-27 16:15:18,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 16:15:18,266 INFO L276 IsEmpty]: Start isEmpty. Operand 32150 states and 45169 transitions. [2020-10-27 16:15:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1777 [2020-10-27 16:15:18,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:15:18,385 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:15:18,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 16:15:18,385 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:15:18,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:15:18,386 INFO L82 PathProgramCache]: Analyzing trace with hash -224580735, now seen corresponding path program 1 times [2020-10-27 16:15:18,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:15:18,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174269850] [2020-10-27 16:15:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:15:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:15:18,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:15:18,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:15:18,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:15:20,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:15:23,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:15:23,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1804 [2020-10-27 16:15:23,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 16:15:23,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 16:15:23,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:15:23,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:15:23,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-27 16:15:23,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:15:23,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:15:23,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:15:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:15:23,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:15:23,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:15:23,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:15:23,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:15:23,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 16:15:23,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:15:23,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:15:23,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:15:23,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:15:23,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:15:23,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:15:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:15:23,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:15:23,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:15:23,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 16:15:23,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:15:23,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 16:15:23,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:15:23,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:15:23,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:15:23,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:15:23,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:15:23,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 16:15:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:15:23,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:15:24,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:15:24,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 16:15:24,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:15:24,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 16:15:24,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:15:24,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:15:24,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-27 16:15:24,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:15:24,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:15:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 16:15:25,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174269850] [2020-10-27 16:15:25,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:15:25,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 16:15:25,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843279129] [2020-10-27 16:15:25,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:15:25,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:15:25,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:15:25,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:15:25,349 INFO L87 Difference]: Start difference. First operand 32150 states and 45169 transitions. Second operand 5 states. [2020-10-27 16:15:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:15:54,740 INFO L93 Difference]: Finished difference Result 74899 states and 107614 transitions. [2020-10-27 16:15:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:15:54,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1776 [2020-10-27 16:15:54,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:15:54,880 INFO L225 Difference]: With dead ends: 74899 [2020-10-27 16:15:54,880 INFO L226 Difference]: Without dead ends: 42755 [2020-10-27 16:15:54,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:15:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42755 states. [2020-10-27 16:15:55,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42755 to 42683. [2020-10-27 16:15:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42683 states. [2020-10-27 16:15:55,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42683 states to 42683 states and 59134 transitions. [2020-10-27 16:15:55,850 INFO L78 Accepts]: Start accepts. Automaton has 42683 states and 59134 transitions. Word has length 1776 [2020-10-27 16:15:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:15:55,851 INFO L481 AbstractCegarLoop]: Abstraction has 42683 states and 59134 transitions. [2020-10-27 16:15:55,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:15:55,851 INFO L276 IsEmpty]: Start isEmpty. Operand 42683 states and 59134 transitions. [2020-10-27 16:15:56,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1825 [2020-10-27 16:15:56,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:15:56,254 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:15:56,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 16:15:56,254 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:15:56,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:15:56,256 INFO L82 PathProgramCache]: Analyzing trace with hash -556702007, now seen corresponding path program 1 times [2020-10-27 16:15:56,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:15:56,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111122262] [2020-10-27 16:15:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:15:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:15:56,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:15:56,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:16:01,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:16:01,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1852 [2020-10-27 16:16:01,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:16:01,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5104 [2020-10-27 16:16:01,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:16:01,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:16:01,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 16:16:01,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-27 16:16:01,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:16:01,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:16:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:16:01,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:16:01,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:16:01,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:16:01,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:16:01,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 16:16:01,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:16:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:16:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:16:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:16:01,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:16:01,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:16:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:16:01,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:16:01,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:16:01,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 16:16:01,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:16:01,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 16:16:01,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:16:01,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:16:01,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:16:01,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 16:16:01,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:16:01,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 16:16:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:16:02,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:16:02,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:16:02,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 16:16:02,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:16:02,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-27 16:16:02,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:16:02,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:16:02,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:16:02,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 16:16:02,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:16:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 136 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 16:16:03,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111122262] [2020-10-27 16:16:03,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:16:03,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 16:16:03,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150504050] [2020-10-27 16:16:03,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:16:03,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:16:03,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:16:03,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:16:03,695 INFO L87 Difference]: Start difference. First operand 42683 states and 59134 transitions. Second operand 7 states.