/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:51:34,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:51:34,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:51:34,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:51:34,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:51:34,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:51:35,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:51:35,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:51:35,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:51:35,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:51:35,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:51:35,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:51:35,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:51:35,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:51:35,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:51:35,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:51:35,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:51:35,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:51:35,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:51:35,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:51:35,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:51:35,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:51:35,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:51:35,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:51:35,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:51:35,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:51:35,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:51:35,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:51:35,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:51:35,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:51:35,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:51:35,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:51:35,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:51:35,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:51:35,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:51:35,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:51:35,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:51:35,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:51:35,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:51:35,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:51:35,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:51:35,074 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 18:51:35,140 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:51:35,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:51:35,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:51:35,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:51:35,146 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:51:35,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:51:35,146 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:51:35,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:51:35,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:51:35,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:51:35,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:51:35,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:51:35,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:51:35,149 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:51:35,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:51:35,150 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:51:35,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:51:35,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:51:35,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:51:35,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:51:35,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:51:35,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:51:35,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:51:35,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:51:35,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:51:35,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:51:35,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:51:35,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:51:35,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:51:35,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:51:35,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:51:35,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:51:35,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:51:35,839 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:51:35,840 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:51:35,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label17.c [2020-10-27 18:51:35,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acde018ee/977077938fe04c35ae50209a8a984e2a/FLAG09db9b1c5 [2020-10-27 18:51:37,189 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:51:37,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label17.c [2020-10-27 18:51:37,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acde018ee/977077938fe04c35ae50209a8a984e2a/FLAG09db9b1c5 [2020-10-27 18:51:37,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acde018ee/977077938fe04c35ae50209a8a984e2a [2020-10-27 18:51:37,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:51:37,656 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:51:37,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:51:37,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:51:37,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:51:37,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:51:37" (1/1) ... [2020-10-27 18:51:37,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27bfbf7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:37, skipping insertion in model container [2020-10-27 18:51:37,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:51:37" (1/1) ... [2020-10-27 18:51:37,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:51:37,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:51:39,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:51:39,068 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:51:39,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:51:39,653 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:51:39,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:39 WrapperNode [2020-10-27 18:51:39,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:51:39,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:51:39,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:51:39,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:51:39,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:39" (1/1) ... [2020-10-27 18:51:39,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:39" (1/1) ... [2020-10-27 18:51:39,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:39" (1/1) ... [2020-10-27 18:51:39,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:39" (1/1) ... [2020-10-27 18:51:39,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:39" (1/1) ... [2020-10-27 18:51:39,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:39" (1/1) ... [2020-10-27 18:51:40,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:39" (1/1) ... [2020-10-27 18:51:40,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:51:40,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:51:40,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:51:40,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:51:40,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:51:40,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:51:40,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:51:40,191 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:51:40,192 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:51:40,192 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:51:40,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:51:40,194 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:51:40,194 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:51:40,195 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:51:40,195 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:51:40,196 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:51:40,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:51:40,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:51:40,197 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:51:40,197 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:51:40,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:51:40,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:51:40,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:51:40,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:51:40,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:51:40,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:51:50,127 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:51:50,128 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:51:50,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:51:50 BoogieIcfgContainer [2020-10-27 18:51:50,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:51:50,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:51:50,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:51:50,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:51:50,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:51:37" (1/3) ... [2020-10-27 18:51:50,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1704fdf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:51:50, skipping insertion in model container [2020-10-27 18:51:50,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:39" (2/3) ... [2020-10-27 18:51:50,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1704fdf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:51:50, skipping insertion in model container [2020-10-27 18:51:50,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:51:50" (3/3) ... [2020-10-27 18:51:50,146 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label17.c [2020-10-27 18:51:50,163 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:51:50,172 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:51:50,195 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:51:50,247 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:51:50,247 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:51:50,247 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:51:50,283 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:51:50,283 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:51:50,283 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:51:50,284 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:51:50,284 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:51:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 18:51:50,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 18:51:50,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:51:50,373 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] [2020-10-27 18:51:50,374 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:51:50,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:51:50,397 INFO L82 PathProgramCache]: Analyzing trace with hash -146325245, now seen corresponding path program 1 times [2020-10-27 18:51:50,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:51:50,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175162732] [2020-10-27 18:51:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:51:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:50,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:51,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:51,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 18:51:51,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:51,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 747 [2020-10-27 18:51:51,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:51:51,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:51:51,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 18:51:51,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:51:51,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:51:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:51,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:51,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:51,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:51:51,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:51,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 18:51:51,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:51,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:51:51,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:51,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:51:51,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:51:51,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175162732] [2020-10-27 18:51:51,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:51:51,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:51:51,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473947436] [2020-10-27 18:51:51,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:51:51,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:51:51,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:51:51,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:51:51,862 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 18:52:04,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:52:04,110 INFO L93 Difference]: Finished difference Result 1698 states and 3099 transitions. [2020-10-27 18:52:04,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:52:04,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-27 18:52:04,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:52:04,144 INFO L225 Difference]: With dead ends: 1698 [2020-10-27 18:52:04,144 INFO L226 Difference]: Without dead ends: 1012 [2020-10-27 18:52:04,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:52:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2020-10-27 18:52:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 987. [2020-10-27 18:52:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 987 states. [2020-10-27 18:52:04,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1579 transitions. [2020-10-27 18:52:04,306 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1579 transitions. Word has length 45 [2020-10-27 18:52:04,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:52:04,307 INFO L481 AbstractCegarLoop]: Abstraction has 987 states and 1579 transitions. [2020-10-27 18:52:04,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:52:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1579 transitions. [2020-10-27 18:52:04,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 18:52:04,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:52:04,317 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:52:04,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:52:04,318 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:52:04,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:52:04,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1292671230, now seen corresponding path program 1 times [2020-10-27 18:52:04,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:52:04,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189450365] [2020-10-27 18:52:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:52:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:04,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:04,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:06,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:06,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:06,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 18:52:06,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:52:06,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1858 [2020-10-27 18:52:06,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:06,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:52:06,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 18:52:06,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:52:06,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:52:06,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:52:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:06,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:06,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:06,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:52:06,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:06,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 18:52:06,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:06,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:52:06,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:52:06,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:52:06,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:52:06,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:52:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:06,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:06,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:06,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 18:52:06,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:06,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-27 18:52:06,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:06,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:52:06,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:52:06,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:52:06,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:52:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:52:06,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189450365] [2020-10-27 18:52:06,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:52:06,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:52:06,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560770555] [2020-10-27 18:52:06,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:52:06,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:52:06,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:52:06,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:52:06,715 INFO L87 Difference]: Start difference. First operand 987 states and 1579 transitions. Second operand 5 states. [2020-10-27 18:52:20,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:52:20,697 INFO L93 Difference]: Finished difference Result 2876 states and 4640 transitions. [2020-10-27 18:52:20,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:52:20,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2020-10-27 18:52:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:52:20,713 INFO L225 Difference]: With dead ends: 2876 [2020-10-27 18:52:20,713 INFO L226 Difference]: Without dead ends: 1895 [2020-10-27 18:52:20,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:52:20,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2020-10-27 18:52:20,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1883. [2020-10-27 18:52:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1883 states. [2020-10-27 18:52:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 2778 transitions. [2020-10-27 18:52:20,802 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 2778 transitions. Word has length 114 [2020-10-27 18:52:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:52:20,803 INFO L481 AbstractCegarLoop]: Abstraction has 1883 states and 2778 transitions. [2020-10-27 18:52:20,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:52:20,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 2778 transitions. [2020-10-27 18:52:20,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 18:52:20,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:52:20,807 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:52:20,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:52:20,807 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:52:20,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:52:20,808 INFO L82 PathProgramCache]: Analyzing trace with hash 173715735, now seen corresponding path program 1 times [2020-10-27 18:52:20,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:52:20,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607240147] [2020-10-27 18:52:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:52:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:20,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:21,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:21,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:21,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 18:52:21,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:52:21,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-10-27 18:52:21,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:21,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 18:52:21,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:52:21,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-27 18:52:21,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:52:22,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:52:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:22,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:22,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:22,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:52:22,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:22,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 18:52:22,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:22,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:52:22,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:52:22,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:52:22,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:52:22,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:52:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:22,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:22,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:22,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:52:22,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:22,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 18:52:22,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:22,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:52:22,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:52:22,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 18:52:22,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 35 [2020-10-27 18:52:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:52:22,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607240147] [2020-10-27 18:52:22,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:52:22,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:52:22,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243032938] [2020-10-27 18:52:22,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:52:22,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:52:22,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:52:22,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:52:22,613 INFO L87 Difference]: Start difference. First operand 1883 states and 2778 transitions. Second operand 8 states. [2020-10-27 18:52:50,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:52:50,142 INFO L93 Difference]: Finished difference Result 4801 states and 7739 transitions. [2020-10-27 18:52:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 18:52:50,148 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 119 [2020-10-27 18:52:50,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:52:50,185 INFO L225 Difference]: With dead ends: 4801 [2020-10-27 18:52:50,185 INFO L226 Difference]: Without dead ends: 3805 [2020-10-27 18:52:50,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-27 18:52:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2020-10-27 18:52:50,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 3721. [2020-10-27 18:52:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3721 states. [2020-10-27 18:52:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 5467 transitions. [2020-10-27 18:52:50,365 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 5467 transitions. Word has length 119 [2020-10-27 18:52:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:52:50,368 INFO L481 AbstractCegarLoop]: Abstraction has 3721 states and 5467 transitions. [2020-10-27 18:52:50,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:52:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 5467 transitions. [2020-10-27 18:52:50,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 18:52:50,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:52:50,381 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:52:50,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:52:50,382 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:52:50,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:52:50,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1785151086, now seen corresponding path program 1 times [2020-10-27 18:52:50,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:52:50,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950794015] [2020-10-27 18:52:50,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:52:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:50,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:50,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:51,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:51,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 18:52:51,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:52:51,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1187 [2020-10-27 18:52:51,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:51,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:52:51,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 94 [2020-10-27 18:52:51,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:52:51,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:52:51,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:52:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:51,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:51,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:51,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:52:51,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:51,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:52:51,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:51,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:52:51,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:52:51,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:52:51,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:52:51,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:52:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:51,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:51,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:51,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 18:52:51,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:51,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 18:52:51,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:51,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:52:51,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:52:51,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 18:52:51,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:52:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:52:52,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950794015] [2020-10-27 18:52:52,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:52:52,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:52:52,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913197961] [2020-10-27 18:52:52,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:52:52,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:52:52,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:52:52,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:52:52,035 INFO L87 Difference]: Start difference. First operand 3721 states and 5467 transitions. Second operand 5 states. [2020-10-27 18:53:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:53:06,522 INFO L93 Difference]: Finished difference Result 9244 states and 14054 transitions. [2020-10-27 18:53:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:53:06,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-10-27 18:53:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:53:06,563 INFO L225 Difference]: With dead ends: 9244 [2020-10-27 18:53:06,563 INFO L226 Difference]: Without dead ends: 6409 [2020-10-27 18:53:06,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:53:06,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6409 states. [2020-10-27 18:53:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6409 to 6395. [2020-10-27 18:53:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6395 states. [2020-10-27 18:53:06,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6395 states to 6395 states and 8702 transitions. [2020-10-27 18:53:06,810 INFO L78 Accepts]: Start accepts. Automaton has 6395 states and 8702 transitions. Word has length 129 [2020-10-27 18:53:06,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:53:06,810 INFO L481 AbstractCegarLoop]: Abstraction has 6395 states and 8702 transitions. [2020-10-27 18:53:06,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:53:06,811 INFO L276 IsEmpty]: Start isEmpty. Operand 6395 states and 8702 transitions. [2020-10-27 18:53:06,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 18:53:06,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:53:06,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:53:06,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:53:06,814 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:53:06,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:53:06,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1864026946, now seen corresponding path program 1 times [2020-10-27 18:53:06,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:53:06,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159276150] [2020-10-27 18:53:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:53:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:06,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:07,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:08,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:08,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:08,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 18:53:08,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:53:08,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1388 [2020-10-27 18:53:08,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:08,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:53:08,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-27 18:53:08,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:53:08,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:08,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:53:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:08,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:08,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:08,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:53:08,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:08,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 18:53:08,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:08,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:53:08,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:08,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:53:08,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:53:08,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:53:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:08,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:08,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:08,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 18:53:08,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:08,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-27 18:53:08,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:08,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:53:08,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:08,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 18:53:08,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:53:08,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159276150] [2020-10-27 18:53:08,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:53:08,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:53:08,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908390429] [2020-10-27 18:53:08,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:53:08,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:53:08,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:53:08,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:53:08,684 INFO L87 Difference]: Start difference. First operand 6395 states and 8702 transitions. Second operand 5 states. [2020-10-27 18:53:30,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:53:30,534 INFO L93 Difference]: Finished difference Result 13703 states and 19037 transitions. [2020-10-27 18:53:30,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:53:30,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2020-10-27 18:53:30,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:53:30,585 INFO L225 Difference]: With dead ends: 13703 [2020-10-27 18:53:30,585 INFO L226 Difference]: Without dead ends: 8194 [2020-10-27 18:53:30,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:53:30,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8194 states. [2020-10-27 18:53:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8194 to 8170. [2020-10-27 18:53:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8170 states. [2020-10-27 18:53:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8170 states to 8170 states and 11005 transitions. [2020-10-27 18:53:30,887 INFO L78 Accepts]: Start accepts. Automaton has 8170 states and 11005 transitions. Word has length 130 [2020-10-27 18:53:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:53:30,888 INFO L481 AbstractCegarLoop]: Abstraction has 8170 states and 11005 transitions. [2020-10-27 18:53:30,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:53:30,888 INFO L276 IsEmpty]: Start isEmpty. Operand 8170 states and 11005 transitions. [2020-10-27 18:53:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 18:53:30,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:53:30,892 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:53:30,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:53:30,892 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:53:30,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:53:30,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1808997866, now seen corresponding path program 1 times [2020-10-27 18:53:30,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:53:30,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095574953] [2020-10-27 18:53:30,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:53:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:30,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:31,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:31,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:32,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:35,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:35,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 18:53:35,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:53:35,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 18:53:35,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:35,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:53:35,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-27 18:53:35,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:53:35,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:36,125 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:53:36,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:53:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:36,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:36,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:36,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:53:36,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:36,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:53:36,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:36,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:53:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:53:36,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:36,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:53:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:36,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:36,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:36,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 18:53:36,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:36,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-27 18:53:36,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:36,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:53:36,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:36,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 18:53:36,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:53:36,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095574953] [2020-10-27 18:53:36,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:53:36,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:53:36,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726994267] [2020-10-27 18:53:36,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:53:36,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:53:36,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:53:36,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:53:36,371 INFO L87 Difference]: Start difference. First operand 8170 states and 11005 transitions. Second operand 5 states. [2020-10-27 18:53:37,288 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 18:53:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:53:55,546 INFO L93 Difference]: Finished difference Result 18567 states and 25993 transitions. [2020-10-27 18:53:55,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:53:55,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2020-10-27 18:53:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:53:55,613 INFO L225 Difference]: With dead ends: 18567 [2020-10-27 18:53:55,613 INFO L226 Difference]: Without dead ends: 11283 [2020-10-27 18:53:55,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:53:55,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11283 states. [2020-10-27 18:53:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11283 to 11271. [2020-10-27 18:53:55,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11271 states. [2020-10-27 18:53:55,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11271 states to 11271 states and 14884 transitions. [2020-10-27 18:53:55,986 INFO L78 Accepts]: Start accepts. Automaton has 11271 states and 14884 transitions. Word has length 131 [2020-10-27 18:53:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:53:55,987 INFO L481 AbstractCegarLoop]: Abstraction has 11271 states and 14884 transitions. [2020-10-27 18:53:55,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:53:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 11271 states and 14884 transitions. [2020-10-27 18:53:55,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 18:53:55,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:53:55,992 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:53:55,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:53:55,993 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:53:55,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:53:55,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2141827738, now seen corresponding path program 1 times [2020-10-27 18:53:55,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:53:55,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81609633] [2020-10-27 18:53:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:53:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:56,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:56,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:56,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:57,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:58,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:58,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 18:53:58,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:53:58,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2071 [2020-10-27 18:53:58,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:58,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:53:58,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-27 18:53:58,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 18:53:58,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:58,451 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:53:58,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:53:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:58,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:58,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:58,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:53:58,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:58,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 18:53:58,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:58,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:53:58,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:58,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:53:58,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:58,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:53:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:58,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:58,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:58,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 18:53:58,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:58,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 18:53:58,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:58,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:53:58,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 18:53:58,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:53:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:53:58,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81609633] [2020-10-27 18:53:58,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:53:58,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:53:58,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344060454] [2020-10-27 18:53:58,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:53:58,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:53:58,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:53:58,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:53:58,793 INFO L87 Difference]: Start difference. First operand 11271 states and 14884 transitions. Second operand 5 states. [2020-10-27 18:54:02,258 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-27 18:54:17,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:54:17,136 INFO L93 Difference]: Finished difference Result 21716 states and 28710 transitions. [2020-10-27 18:54:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:54:17,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2020-10-27 18:54:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:54:17,184 INFO L225 Difference]: With dead ends: 21716 [2020-10-27 18:54:17,184 INFO L226 Difference]: Without dead ends: 11283 [2020-10-27 18:54:17,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:54:17,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11283 states. [2020-10-27 18:54:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11283 to 11271. [2020-10-27 18:54:17,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11271 states. [2020-10-27 18:54:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11271 states to 11271 states and 14876 transitions. [2020-10-27 18:54:17,505 INFO L78 Accepts]: Start accepts. Automaton has 11271 states and 14876 transitions. Word has length 133 [2020-10-27 18:54:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:54:17,506 INFO L481 AbstractCegarLoop]: Abstraction has 11271 states and 14876 transitions. [2020-10-27 18:54:17,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:54:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 11271 states and 14876 transitions. [2020-10-27 18:54:17,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-27 18:54:17,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:54:17,511 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:54:17,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:54:17,512 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:54:17,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:54:17,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1630772586, now seen corresponding path program 1 times [2020-10-27 18:54:17,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:54:17,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159655723] [2020-10-27 18:54:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:54:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:17,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:18,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:18,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:18,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 18:54:18,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:54:18,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1077 [2020-10-27 18:54:18,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:18,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:54:18,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-27 18:54:18,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:54:18,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:18,863 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:54:18,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:54:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:18,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:18,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:18,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:54:18,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:18,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:54:18,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:18,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:54:18,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:18,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:54:18,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:18,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:54:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:18,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:19,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:19,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 18:54:19,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:19,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-27 18:54:19,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:54:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 18:54:19,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:54:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:54:19,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159655723] [2020-10-27 18:54:19,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:54:19,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:54:19,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159530220] [2020-10-27 18:54:19,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:54:19,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:54:19,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:54:19,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:54:19,208 INFO L87 Difference]: Start difference. First operand 11271 states and 14876 transitions. Second operand 5 states. [2020-10-27 18:54:22,551 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:54:38,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:54:38,255 INFO L93 Difference]: Finished difference Result 25215 states and 34313 transitions. [2020-10-27 18:54:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:54:38,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-10-27 18:54:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:54:38,318 INFO L225 Difference]: With dead ends: 25215 [2020-10-27 18:54:38,318 INFO L226 Difference]: Without dead ends: 14830 [2020-10-27 18:54:38,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:54:38,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14830 states. [2020-10-27 18:54:38,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14830 to 14811. [2020-10-27 18:54:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14811 states. [2020-10-27 18:54:38,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14811 states to 14811 states and 19077 transitions. [2020-10-27 18:54:38,726 INFO L78 Accepts]: Start accepts. Automaton has 14811 states and 19077 transitions. Word has length 142 [2020-10-27 18:54:38,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:54:38,727 INFO L481 AbstractCegarLoop]: Abstraction has 14811 states and 19077 transitions. [2020-10-27 18:54:38,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:54:38,728 INFO L276 IsEmpty]: Start isEmpty. Operand 14811 states and 19077 transitions. [2020-10-27 18:54:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 18:54:38,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:54:38,735 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:54:38,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:54:38,735 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:54:38,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:54:38,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1688259809, now seen corresponding path program 1 times [2020-10-27 18:54:38,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:54:38,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234571805] [2020-10-27 18:54:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:54:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:38,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:38,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:39,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:40,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:40,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 18:54:40,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:54:40,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1224 [2020-10-27 18:54:40,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:40,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:54:40,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-27 18:54:40,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:54:40,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:40,173 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:54:40,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:54:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:40,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:40,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:40,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:54:40,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:40,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 18:54:40,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:40,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:54:40,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:40,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:54:40,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:40,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:54:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:40,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:40,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:40,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 18:54:40,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:40,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-27 18:54:40,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:40,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:54:40,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-27 18:54:40,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:54:40,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:54:40,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234571805] [2020-10-27 18:54:40,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:54:40,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 18:54:40,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497967974] [2020-10-27 18:54:40,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:54:40,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:54:40,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:54:40,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:54:40,518 INFO L87 Difference]: Start difference. First operand 14811 states and 19077 transitions. Second operand 5 states. [2020-10-27 18:54:41,467 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 18:55:07,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:55:07,548 INFO L93 Difference]: Finished difference Result 39275 states and 52073 transitions. [2020-10-27 18:55:07,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:55:07,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 165 [2020-10-27 18:55:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:55:07,647 INFO L225 Difference]: With dead ends: 39275 [2020-10-27 18:55:07,647 INFO L226 Difference]: Without dead ends: 24470 [2020-10-27 18:55:07,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:55:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24470 states. [2020-10-27 18:55:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24470 to 24011. [2020-10-27 18:55:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24011 states. [2020-10-27 18:55:08,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24011 states to 24011 states and 29683 transitions. [2020-10-27 18:55:08,255 INFO L78 Accepts]: Start accepts. Automaton has 24011 states and 29683 transitions. Word has length 165 [2020-10-27 18:55:08,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:55:08,258 INFO L481 AbstractCegarLoop]: Abstraction has 24011 states and 29683 transitions. [2020-10-27 18:55:08,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:55:08,258 INFO L276 IsEmpty]: Start isEmpty. Operand 24011 states and 29683 transitions. [2020-10-27 18:55:08,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-27 18:55:08,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:55:08,268 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:55:08,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:55:08,269 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:55:08,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:55:08,269 INFO L82 PathProgramCache]: Analyzing trace with hash -879820677, now seen corresponding path program 1 times [2020-10-27 18:55:08,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:55:08,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664280442] [2020-10-27 18:55:08,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:55:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:08,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:08,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:09,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:10,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:10,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-27 18:55:10,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:55:10,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2051 [2020-10-27 18:55:10,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:55:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 147 [2020-10-27 18:55:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:55:10,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:10,624 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:55:10,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:55:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:10,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:10,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:10,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:55:10,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:55:10,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:55:10,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:10,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:55:10,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:55:10,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:55:10,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:10,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:55:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:10,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:10,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:10,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 18:55:10,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:55:10,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-27 18:55:10,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:10,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:55:10,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:55:10,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-27 18:55:10,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:55:11,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664280442] [2020-10-27 18:55:11,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:55:11,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:55:11,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437544160] [2020-10-27 18:55:11,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:55:11,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:55:11,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:55:11,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:55:11,020 INFO L87 Difference]: Start difference. First operand 24011 states and 29683 transitions. Second operand 5 states. [2020-10-27 18:55:11,212 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 66