/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/Problem13_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 07:24:15,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 07:24:15,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 07:24:15,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 07:24:15,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 07:24:15,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 07:24:15,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 07:24:15,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 07:24:15,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 07:24:15,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 07:24:15,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 07:24:15,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 07:24:15,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 07:24:15,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 07:24:15,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 07:24:15,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 07:24:15,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 07:24:15,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 07:24:15,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 07:24:15,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 07:24:15,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 07:24:15,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 07:24:15,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 07:24:15,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 07:24:15,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 07:24:15,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 07:24:15,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 07:24:15,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 07:24:15,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 07:24:15,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 07:24:15,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 07:24:15,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 07:24:15,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 07:24:15,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 07:24:15,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 07:24:15,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 07:24:15,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 07:24:15,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 07:24:15,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 07:24:15,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 07:24:15,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 07:24:15,116 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 [2020-10-29 07:24:15,144 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 07:24:15,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 07:24:15,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 07:24:15,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 07:24:15,146 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 07:24:15,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 07:24:15,146 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 07:24:15,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 07:24:15,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 07:24:15,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 07:24:15,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 07:24:15,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 07:24:15,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 07:24:15,148 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 07:24:15,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 07:24:15,148 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 07:24:15,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 07:24:15,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 07:24:15,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 07:24:15,149 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 07:24:15,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 07:24:15,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 07:24:15,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 07:24:15,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 07:24:15,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 07:24:15,150 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 07:24:15,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 07:24:15,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 07:24:15,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 07:24:15,151 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 07:24:15,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 07:24:15,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 07:24:15,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 07:24:15,587 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 07:24:15,588 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 07:24:15,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label55.c [2020-10-29 07:24:15,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10fcf96d6/da5ed9aae2ac4a999ffb7a2b4886c41b/FLAG29f3a133f [2020-10-29 07:24:16,788 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 07:24:16,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label55.c [2020-10-29 07:24:16,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10fcf96d6/da5ed9aae2ac4a999ffb7a2b4886c41b/FLAG29f3a133f [2020-10-29 07:24:17,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10fcf96d6/da5ed9aae2ac4a999ffb7a2b4886c41b [2020-10-29 07:24:17,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 07:24:17,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 07:24:17,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 07:24:17,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 07:24:17,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 07:24:17,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:24:17" (1/1) ... [2020-10-29 07:24:17,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a72b053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:24:17, skipping insertion in model container [2020-10-29 07:24:17,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:24:17" (1/1) ... [2020-10-29 07:24:17,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 07:24:17,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 07:24:18,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:24:18,824 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 07:24:19,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:24:19,575 INFO L208 MainTranslator]: Completed translation [2020-10-29 07:24:19,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:24:19 WrapperNode [2020-10-29 07:24:19,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 07:24:19,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 07:24:19,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 07:24:19,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 07:24:19,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:24:19" (1/1) ... [2020-10-29 07:24:19,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:24:19" (1/1) ... [2020-10-29 07:24:19,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:24:19" (1/1) ... [2020-10-29 07:24:19,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:24:19" (1/1) ... [2020-10-29 07:24:19,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:24:19" (1/1) ... [2020-10-29 07:24:19,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:24:19" (1/1) ... [2020-10-29 07:24:19,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:24:19" (1/1) ... [2020-10-29 07:24:19,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 07:24:19,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 07:24:19,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 07:24:19,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 07:24:19,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:24:19" (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 [2020-10-29 07:24:20,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 07:24:20,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 07:24:20,200 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 07:24:20,200 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 07:24:20,200 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 07:24:20,200 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 07:24:20,200 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 07:24:20,200 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 07:24:20,200 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 07:24:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 07:24:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 07:24:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 07:24:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 07:24:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 07:24:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 07:24:20,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 07:24:20,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 07:24:20,202 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 07:24:20,202 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 07:24:20,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 07:24:20,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 07:24:20,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 07:24:20,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 07:24:20,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 07:24:20,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 07:24:30,400 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 07:24:30,401 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 07:24:30,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:24:30 BoogieIcfgContainer [2020-10-29 07:24:30,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 07:24:30,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 07:24:30,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 07:24:30,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 07:24:30,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 07:24:17" (1/3) ... [2020-10-29 07:24:30,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a51a6ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:24:30, skipping insertion in model container [2020-10-29 07:24:30,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:24:19" (2/3) ... [2020-10-29 07:24:30,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a51a6ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:24:30, skipping insertion in model container [2020-10-29 07:24:30,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:24:30" (3/3) ... [2020-10-29 07:24:30,415 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label55.c [2020-10-29 07:24:30,427 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 07:24:30,433 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 07:24:30,447 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 07:24:30,483 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 07:24:30,483 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 07:24:30,483 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 07:24:30,484 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 07:24:30,484 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 07:24:30,484 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 07:24:30,484 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 07:24:30,484 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 07:24:30,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-29 07:24:30,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 07:24:30,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:24:30,536 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] [2020-10-29 07:24:30,536 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:24:30,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:24:30,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1543639346, now seen corresponding path program 1 times [2020-10-29 07:24:30,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:24:30,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031724548] [2020-10-29 07:24:30,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:24:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:24:30,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:24:31,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:24:31,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 07:24:31,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:24:31,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-29 07:24:31,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:24:31,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:24:31,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:24:31,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:24:31,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 07:24:31,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 07:24:31,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:24:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:24:31,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:24:31,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:24:31,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:24:31,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:24:31,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 07:24:31,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:24:31,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:24:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:24:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:24:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:24:31,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:24:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:24:31,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031724548] [2020-10-29 07:24:31,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:24:31,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 07:24:31,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956674042] [2020-10-29 07:24:31,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 07:24:31,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:24:31,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 07:24:31,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 07:24:31,688 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-29 07:24:50,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:24:50,756 INFO L93 Difference]: Finished difference Result 3235 states and 5915 transitions. [2020-10-29 07:24:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:24:50,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-29 07:24:50,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:24:50,796 INFO L225 Difference]: With dead ends: 3235 [2020-10-29 07:24:50,796 INFO L226 Difference]: Without dead ends: 2027 [2020-10-29 07:24:50,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 07:24:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2020-10-29 07:24:50,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2010. [2020-10-29 07:24:50,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-29 07:24:51,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3292 transitions. [2020-10-29 07:24:51,011 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3292 transitions. Word has length 55 [2020-10-29 07:24:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:24:51,012 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3292 transitions. [2020-10-29 07:24:51,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 07:24:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3292 transitions. [2020-10-29 07:24:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-29 07:24:51,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:24:51,030 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] [2020-10-29 07:24:51,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 07:24:51,031 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:24:51,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:24:51,033 INFO L82 PathProgramCache]: Analyzing trace with hash 239703161, now seen corresponding path program 1 times [2020-10-29 07:24:51,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:24:51,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100606149] [2020-10-29 07:24:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:24:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:24:51,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:24:51,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:24:52,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:24:53,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:24:53,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-29 07:24:53,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:24:53,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2213 [2020-10-29 07:24:53,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:24:53,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:24:53,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:24:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:24:53,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 07:24:53,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 07:24:53,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:24:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:24:53,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:24:53,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:24:53,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:24:53,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:24:53,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 07:24:53,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:24:53,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:24:53,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:24:53,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:24:53,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:24:53,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 07:24:53,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:24:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:24:53,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:24:53,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:24:53,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 07:24:53,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:24:53,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-29 07:24:53,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:24:53,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:24:53,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:24:53,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:24:53,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 07:24:53,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:24:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:24:53,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100606149] [2020-10-29 07:24:53,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:24:53,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:24:53,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717986272] [2020-10-29 07:24:53,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:24:53,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:24:53,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:24:53,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:24:53,954 INFO L87 Difference]: Start difference. First operand 2010 states and 3292 transitions. Second operand 7 states. [2020-10-29 07:25:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:25:15,703 INFO L93 Difference]: Finished difference Result 5803 states and 9565 transitions. [2020-10-29 07:25:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 07:25:15,712 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 130 [2020-10-29 07:25:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:25:15,736 INFO L225 Difference]: With dead ends: 5803 [2020-10-29 07:25:15,737 INFO L226 Difference]: Without dead ends: 3799 [2020-10-29 07:25:15,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-29 07:25:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3799 states. [2020-10-29 07:25:15,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3799 to 3699. [2020-10-29 07:25:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3699 states. [2020-10-29 07:25:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 5280 transitions. [2020-10-29 07:25:15,867 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 5280 transitions. Word has length 130 [2020-10-29 07:25:15,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:25:15,868 INFO L481 AbstractCegarLoop]: Abstraction has 3699 states and 5280 transitions. [2020-10-29 07:25:15,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:25:15,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 5280 transitions. [2020-10-29 07:25:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-29 07:25:15,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:25:15,872 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] [2020-10-29 07:25:15,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 07:25:15,872 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:25:15,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:25:15,873 INFO L82 PathProgramCache]: Analyzing trace with hash 751825941, now seen corresponding path program 1 times [2020-10-29 07:25:15,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:25:15,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560637596] [2020-10-29 07:25:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:25:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:25:15,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:25:16,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:25:17,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:25:17,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-29 07:25:17,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:25:17,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1242 [2020-10-29 07:25:17,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:25:17,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:25:17,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:25:17,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:25:17,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-29 07:25:17,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:25:17,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:25:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:25:17,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:25:17,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:25:17,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:25:17,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:25:17,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 07:25:17,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:25:17,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:25:17,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:25:17,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:25:17,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:25:17,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:25:17,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:25:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:25:17,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:25:17,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:25:17,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 07:25:17,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:25:17,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-29 07:25:17,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:25:17,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:25:17,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:25:17,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:25:17,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-29 07:25:17,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:25:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:25:17,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560637596] [2020-10-29 07:25:17,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:25:17,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:25:17,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512442129] [2020-10-29 07:25:17,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:25:17,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:25:17,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:25:17,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:25:17,788 INFO L87 Difference]: Start difference. First operand 3699 states and 5280 transitions. Second operand 7 states. [2020-10-29 07:25:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:25:41,716 INFO L93 Difference]: Finished difference Result 11025 states and 15912 transitions. [2020-10-29 07:25:41,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:25:41,717 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 160 [2020-10-29 07:25:41,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:25:41,756 INFO L225 Difference]: With dead ends: 11025 [2020-10-29 07:25:41,757 INFO L226 Difference]: Without dead ends: 7332 [2020-10-29 07:25:41,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:25:41,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7332 states. [2020-10-29 07:25:41,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7332 to 7153. [2020-10-29 07:25:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7153 states. [2020-10-29 07:25:41,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7153 states to 7153 states and 9222 transitions. [2020-10-29 07:25:41,996 INFO L78 Accepts]: Start accepts. Automaton has 7153 states and 9222 transitions. Word has length 160 [2020-10-29 07:25:41,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:25:41,998 INFO L481 AbstractCegarLoop]: Abstraction has 7153 states and 9222 transitions. [2020-10-29 07:25:41,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:25:41,999 INFO L276 IsEmpty]: Start isEmpty. Operand 7153 states and 9222 transitions. [2020-10-29 07:25:42,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-29 07:25:42,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:25:42,006 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:25:42,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 07:25:42,007 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:25:42,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:25:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1586998834, now seen corresponding path program 1 times [2020-10-29 07:25:42,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:25:42,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694963242] [2020-10-29 07:25:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:25:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:25:42,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:25:42,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:25:43,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:25:45,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:25:45,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-29 07:25:45,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:25:45,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3755 [2020-10-29 07:25:45,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:25:45,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:25:45,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:25:45,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-29 07:25:45,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 07:25:45,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:25:46,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:25:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:25:46,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:25:46,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:25:46,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:25:46,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:25:46,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 07:25:46,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:25:46,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:25:46,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:25:46,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:25:46,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:25:46,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:25:46,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:25:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:25:46,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:25:46,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:25:46,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 07:25:46,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:25:46,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-29 07:25:46,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:25:46,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:25:46,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:25:46,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:25:46,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 07:25:46,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:25:46,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-29 07:25:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:25:46,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:25:46,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:25:46,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-29 07:25:46,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:25:46,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-29 07:25:46,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:25:46,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:25:46,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:25:46,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:25:46,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-29 07:25:46,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:25:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 184 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 07:25:46,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694963242] [2020-10-29 07:25:46,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:25:46,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:25:46,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933765670] [2020-10-29 07:25:46,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:25:46,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:25:46,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:25:46,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:25:46,810 INFO L87 Difference]: Start difference. First operand 7153 states and 9222 transitions. Second operand 7 states. [2020-10-29 07:25:46,959 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 07:26:10,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:26:10,815 INFO L93 Difference]: Finished difference Result 18925 states and 25582 transitions. [2020-10-29 07:26:10,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 07:26:10,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 255 [2020-10-29 07:26:10,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:26:10,892 INFO L225 Difference]: With dead ends: 18925 [2020-10-29 07:26:10,892 INFO L226 Difference]: Without dead ends: 12581 [2020-10-29 07:26:10,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:26:10,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12581 states. [2020-10-29 07:26:11,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12581 to 12399. [2020-10-29 07:26:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12399 states. [2020-10-29 07:26:11,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 16646 transitions. [2020-10-29 07:26:11,238 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 16646 transitions. Word has length 255 [2020-10-29 07:26:11,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:26:11,240 INFO L481 AbstractCegarLoop]: Abstraction has 12399 states and 16646 transitions. [2020-10-29 07:26:11,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:26:11,241 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 16646 transitions. [2020-10-29 07:26:11,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-29 07:26:11,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:26:11,252 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:26:11,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 07:26:11,253 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:26:11,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:26:11,254 INFO L82 PathProgramCache]: Analyzing trace with hash -14057352, now seen corresponding path program 1 times [2020-10-29 07:26:11,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:26:11,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158730317] [2020-10-29 07:26:11,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:26:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:26:11,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:11,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:12,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:12,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:14,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:16,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:26:16,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-29 07:26:16,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 07:26:16,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-29 07:26:16,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:26:16,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:26:16,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:26:16,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-29 07:26:16,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 196 [2020-10-29 07:26:16,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:26:16,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:26:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:26:16,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:16,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:26:16,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:26:16,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:26:16,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 07:26:16,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:26:16,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:26:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:26:16,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:26:16,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:26:16,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:26:16,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:26:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:26:16,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:16,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:26:16,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-29 07:26:16,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:26:16,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-29 07:26:16,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:26:16,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:26:16,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:26:16,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:26:16,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 07:26:16,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:26:16,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-29 07:26:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:26:17,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:17,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:26:17,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-29 07:26:17,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:26:17,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-29 07:26:17,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:26:17,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:26:17,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:26:17,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:26:17,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-29 07:26:17,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:26:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 171 proven. 47 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 07:26:17,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158730317] [2020-10-29 07:26:17,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:26:17,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 07:26:17,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740483342] [2020-10-29 07:26:17,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 07:26:17,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:26:17,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 07:26:17,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 07:26:17,527 INFO L87 Difference]: Start difference. First operand 12399 states and 16646 transitions. Second operand 6 states. [2020-10-29 07:26:42,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:26:42,238 INFO L93 Difference]: Finished difference Result 26948 states and 38935 transitions. [2020-10-29 07:26:42,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 07:26:42,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 325 [2020-10-29 07:26:42,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:26:42,307 INFO L225 Difference]: With dead ends: 26948 [2020-10-29 07:26:42,307 INFO L226 Difference]: Without dead ends: 19510 [2020-10-29 07:26:42,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 07:26:42,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19510 states. [2020-10-29 07:26:42,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19510 to 19480. [2020-10-29 07:26:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19480 states. [2020-10-29 07:26:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19480 states to 19480 states and 25345 transitions. [2020-10-29 07:26:42,910 INFO L78 Accepts]: Start accepts. Automaton has 19480 states and 25345 transitions. Word has length 325 [2020-10-29 07:26:42,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:26:42,911 INFO L481 AbstractCegarLoop]: Abstraction has 19480 states and 25345 transitions. [2020-10-29 07:26:42,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 07:26:42,911 INFO L276 IsEmpty]: Start isEmpty. Operand 19480 states and 25345 transitions. [2020-10-29 07:26:42,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-10-29 07:26:42,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:26:42,926 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:26:42,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 07:26:42,927 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:26:42,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:26:42,928 INFO L82 PathProgramCache]: Analyzing trace with hash -884148486, now seen corresponding path program 1 times [2020-10-29 07:26:42,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:26:42,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917300252] [2020-10-29 07:26:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:26:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:26:43,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:43,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:43,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:48,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:26:48,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 386 [2020-10-29 07:26:48,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:26:48,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-29 07:26:48,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:26:48,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:26:48,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:26:48,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-29 07:26:48,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 227 [2020-10-29 07:26:48,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:26:48,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:26:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:26:48,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:48,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:26:48,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:26:48,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:26:48,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 07:26:48,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:26:48,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:26:48,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:26:48,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:26:48,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:26:48,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:26:48,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:26:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:26:48,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:48,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:26:48,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 07:26:48,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:26:48,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-29 07:26:48,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:26:48,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:26:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:26:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:26:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 07:26:48,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:26:48,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-29 07:26:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:26:48,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:48,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:48,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:26:48,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 07:26:48,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:26:48,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-29 07:26:48,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:26:48,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:26:48,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:26:48,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:26:48,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 07:26:48,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:26:48,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-10-29 07:26:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:26:48,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:26:48,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:26:48,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-29 07:26:48,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:26:48,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-29 07:26:48,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:26:48,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:26:48,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:26:48,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:26:48,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-29 07:26:48,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:26:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 305 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-29 07:26:49,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917300252] [2020-10-29 07:26:49,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:26:49,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:26:49,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631133529] [2020-10-29 07:26:49,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:26:49,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:26:49,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:26:49,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:26:49,235 INFO L87 Difference]: Start difference. First operand 19480 states and 25345 transitions. Second operand 7 states. [2020-10-29 07:27:13,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:27:13,424 INFO L93 Difference]: Finished difference Result 49141 states and 72167 transitions. [2020-10-29 07:27:13,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 07:27:13,427 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 370 [2020-10-29 07:27:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:27:13,573 INFO L225 Difference]: With dead ends: 49141 [2020-10-29 07:27:13,573 INFO L226 Difference]: Without dead ends: 30470 [2020-10-29 07:27:13,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:27:13,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30470 states. [2020-10-29 07:27:14,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30470 to 30118. [2020-10-29 07:27:14,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30118 states. [2020-10-29 07:27:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30118 states to 30118 states and 40673 transitions. [2020-10-29 07:27:14,514 INFO L78 Accepts]: Start accepts. Automaton has 30118 states and 40673 transitions. Word has length 370 [2020-10-29 07:27:14,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:27:14,515 INFO L481 AbstractCegarLoop]: Abstraction has 30118 states and 40673 transitions. [2020-10-29 07:27:14,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:27:14,515 INFO L276 IsEmpty]: Start isEmpty. Operand 30118 states and 40673 transitions. [2020-10-29 07:27:14,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-29 07:27:14,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:27:14,670 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-29 07:27:14,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 07:27:14,671 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:27:14,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:27:14,672 INFO L82 PathProgramCache]: Analyzing trace with hash -226817735, now seen corresponding path program 1 times [2020-10-29 07:27:14,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:27:14,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541434864] [2020-10-29 07:27:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:27:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:27:14,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:14,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:14,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:18,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:19,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:27:19,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 393 [2020-10-29 07:27:19,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 07:27:19,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 07:27:19,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:27:19,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:27:19,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 07:27:19,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:27:19,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 227 [2020-10-29 07:27:19,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:27:19,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:27:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:27:19,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:19,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:27:19,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:27:19,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:27:19,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 07:27:19,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:27:19,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:27:19,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:27:19,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:27:19,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:27:19,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:27:19,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:27:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:27:19,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:20,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:20,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:27:20,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 07:27:20,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:27:20,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-29 07:27:20,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:27:20,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:27:20,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:27:20,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:27:20,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 07:27:20,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:27:20,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-29 07:27:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:27:20,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:20,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:27:20,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-29 07:27:20,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:27:20,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-29 07:27:20,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:27:20,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:27:20,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:27:20,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:27:20,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-29 07:27:20,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:27:20,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-10-29 07:27:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:27:20,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:20,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:27:20,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 07:27:20,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:27:20,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-29 07:27:20,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:27:20,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:27:20,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:27:20,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-29 07:27:20,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:27:20,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:27:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 232 proven. 102 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-29 07:27:20,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541434864] [2020-10-29 07:27:20,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:27:20,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:27:20,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326123618] [2020-10-29 07:27:20,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:27:20,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:27:20,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:27:20,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:27:20,759 INFO L87 Difference]: Start difference. First operand 30118 states and 40673 transitions. Second operand 7 states. [2020-10-29 07:27:45,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:27:45,364 INFO L93 Difference]: Finished difference Result 84213 states and 121228 transitions. [2020-10-29 07:27:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 07:27:45,372 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 377 [2020-10-29 07:27:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:27:45,679 INFO L225 Difference]: With dead ends: 84213 [2020-10-29 07:27:45,679 INFO L226 Difference]: Without dead ends: 54904 [2020-10-29 07:27:45,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:27:45,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54904 states. [2020-10-29 07:27:47,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54904 to 46523. [2020-10-29 07:27:47,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46523 states. [2020-10-29 07:27:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46523 states to 46523 states and 62241 transitions. [2020-10-29 07:27:47,118 INFO L78 Accepts]: Start accepts. Automaton has 46523 states and 62241 transitions. Word has length 377 [2020-10-29 07:27:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:27:47,119 INFO L481 AbstractCegarLoop]: Abstraction has 46523 states and 62241 transitions. [2020-10-29 07:27:47,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:27:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand 46523 states and 62241 transitions. [2020-10-29 07:27:47,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2020-10-29 07:27:47,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:27:47,139 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, 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, 4, 3, 3, 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] [2020-10-29 07:27:47,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 07:27:47,140 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:27:47,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:27:47,140 INFO L82 PathProgramCache]: Analyzing trace with hash -530156214, now seen corresponding path program 1 times [2020-10-29 07:27:47,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:27:47,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746648235] [2020-10-29 07:27:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:27:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:27:47,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:47,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:47,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:48,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:49,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:52,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:27:52,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 421 [2020-10-29 07:27:52,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 07:27:52,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 07:27:52,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:27:52,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:27:52,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 07:27:52,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-29 07:27:52,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 191 [2020-10-29 07:27:52,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:27:52,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:27:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:27:52,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:52,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:27:52,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:27:52,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:27:52,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 07:27:52,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:27:52,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:27:52,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:27:52,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:27:52,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:27:52,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:27:52,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:27:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:27:52,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:52,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:27:52,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 07:27:52,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:27:52,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-29 07:27:52,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:27:52,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:27:52,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:27:52,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:27:52,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 07:27:52,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:27:52,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-29 07:27:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:27:52,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:52,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:52,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:27:52,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 07:27:52,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:27:52,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-29 07:27:52,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:27:52,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:27:52,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:27:52,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:27:52,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 07:27:52,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:27:52,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-10-29 07:27:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:27:52,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:52,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:27:52,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 07:27:52,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:27:52,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-29 07:27:52,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:27:52,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:27:52,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 07:27:52,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:27:52,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 07:27:52,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:27:53,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2020-10-29 07:27:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:27:53,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:53,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:27:53,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:27:53,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 07:27:53,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:27:53,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-29 07:27:53,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:27:53,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:27:53,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:27:53,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:27:53,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-29 07:27:53,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:27:53,569 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-29 07:27:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 492 proven. 86 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-29 07:27:54,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746648235] [2020-10-29 07:27:54,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:27:54,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 07:27:54,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120012695] [2020-10-29 07:27:54,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 07:27:54,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:27:54,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 07:27:54,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 07:27:54,247 INFO L87 Difference]: Start difference. First operand 46523 states and 62241 transitions. Second operand 10 states. [2020-10-29 07:27:54,740 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-29 07:27:55,553 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-10-29 07:27:58,144 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-29 07:27:58,446 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-29 07:27:59,833 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48