/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:15:30,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:15:30,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:15:30,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:15:30,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:15:30,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:15:30,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:15:30,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:15:30,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:15:30,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:15:30,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:15:30,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:15:30,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:15:30,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:15:30,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:15:30,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:15:30,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:15:30,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:15:30,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:15:30,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:15:30,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:15:30,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:15:30,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:15:30,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:15:30,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:15:30,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:15:30,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:15:30,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:15:30,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:15:30,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:15:30,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:15:30,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:15:30,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:15:30,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:15:30,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:15:30,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:15:30,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:15:30,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:15:30,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:15:30,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:15:30,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:15:30,949 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 00:15:30,998 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:15:30,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:15:31,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:15:31,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:15:31,005 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:15:31,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:15:31,006 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:15:31,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:15:31,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:15:31,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:15:31,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:15:31,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:15:31,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:15:31,009 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:15:31,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:15:31,009 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:15:31,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:15:31,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:15:31,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:15:31,010 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:15:31,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:15:31,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:15:31,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:15:31,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:15:31,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:15:31,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:15:31,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:15:31,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:15:31,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:15:31,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:15:31,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:15:31,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:15:31,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:15:31,526 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:15:31,526 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:15:31,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label41.c [2020-10-27 00:15:31,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1310d46f0/db79996d7b404bde842cc1981eeea169/FLAG27d96b8f0 [2020-10-27 00:15:32,535 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:15:32,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label41.c [2020-10-27 00:15:32,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1310d46f0/db79996d7b404bde842cc1981eeea169/FLAG27d96b8f0 [2020-10-27 00:15:33,068 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1310d46f0/db79996d7b404bde842cc1981eeea169 [2020-10-27 00:15:33,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:15:33,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:15:33,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:15:33,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:15:33,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:15:33,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:15:33" (1/1) ... [2020-10-27 00:15:33,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a66dee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:33, skipping insertion in model container [2020-10-27 00:15:33,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:15:33" (1/1) ... [2020-10-27 00:15:33,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:15:33,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:15:34,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:15:34,456 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:15:34,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:15:35,022 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:15:35,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:35 WrapperNode [2020-10-27 00:15:35,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:15:35,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:15:35,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:15:35,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:15:35,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:35" (1/1) ... [2020-10-27 00:15:35,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:35" (1/1) ... [2020-10-27 00:15:35,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:35" (1/1) ... [2020-10-27 00:15:35,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:35" (1/1) ... [2020-10-27 00:15:35,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:35" (1/1) ... [2020-10-27 00:15:35,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:35" (1/1) ... [2020-10-27 00:15:35,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:35" (1/1) ... [2020-10-27 00:15:35,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:15:35,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:15:35,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:15:35,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:15:35,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:35" (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 00:15:35,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:15:35,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:15:35,515 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:15:35,515 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:15:35,516 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:15:35,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:15:35,516 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:15:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:15:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:15:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:15:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:15:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:15:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:15:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:15:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:15:35,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:15:35,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:15:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:15:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:15:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:15:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:15:44,811 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:15:44,811 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:15:44,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:15:44 BoogieIcfgContainer [2020-10-27 00:15:44,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:15:44,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:15:44,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:15:44,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:15:44,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:15:33" (1/3) ... [2020-10-27 00:15:44,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df01e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:15:44, skipping insertion in model container [2020-10-27 00:15:44,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:15:35" (2/3) ... [2020-10-27 00:15:44,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df01e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:15:44, skipping insertion in model container [2020-10-27 00:15:44,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:15:44" (3/3) ... [2020-10-27 00:15:44,829 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label41.c [2020-10-27 00:15:44,846 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:15:44,853 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:15:44,868 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:15:44,919 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:15:44,919 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:15:44,919 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:15:44,919 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:15:44,920 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:15:44,920 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:15:44,920 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:15:44,920 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:15:44,968 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:15:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 00:15:44,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:15:44,978 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] [2020-10-27 00:15:44,979 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:15:44,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:15:44,989 INFO L82 PathProgramCache]: Analyzing trace with hash -956596429, now seen corresponding path program 1 times [2020-10-27 00:15:45,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:15:45,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495932518] [2020-10-27 00:15:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:15:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:45,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:45,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:45,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 00:15:45,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:45,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-27 00:15:45,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:45,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:15:45,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:15:45,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 00:15:45,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:15:46,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:15:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:46,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:46,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:46,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:15:46,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:46,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 00:15:46,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:46,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:15:46,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:46,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:15:46,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:46,244 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 00:15:46,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495932518] [2020-10-27 00:15:46,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:15:46,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:15:46,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097485427] [2020-10-27 00:15:46,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:15:46,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:15:46,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:15:46,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:15:46,281 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:16:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:01,354 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 00:16:01,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:16:01,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-27 00:16:01,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:01,389 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 00:16:01,390 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 00:16:01,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:16:01,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 00:16:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 00:16:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 00:16:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 00:16:01,573 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 41 [2020-10-27 00:16:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:01,574 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 00:16:01,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:16:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 00:16:01,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 00:16:01,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:01,584 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:16:01,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:16:01,584 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:01,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:01,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1641944046, now seen corresponding path program 1 times [2020-10-27 00:16:01,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:01,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001529204] [2020-10-27 00:16:01,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:01,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:02,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:03,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:03,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:03,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 00:16:03,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:16:03,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1633 [2020-10-27 00:16:03,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:03,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:16:03,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:16:03,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 00:16:03,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:16:03,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:16:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:03,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:03,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:03,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:16:03,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:03,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 00:16:03,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:03,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:16:03,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:03,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:16:03,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:16:03,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:16:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:03,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:03,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:03,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:03,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:16:03,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:16:03,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-27 00:16:03,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:03,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:03,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:03,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:16:03,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:16:04,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001529204] [2020-10-27 00:16:04,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:16:04,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:16:04,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738613009] [2020-10-27 00:16:04,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:16:04,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:16:04,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:16:04,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:16:04,084 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 7 states. [2020-10-27 00:16:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:19,589 INFO L93 Difference]: Finished difference Result 2966 states and 4582 transitions. [2020-10-27 00:16:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:16:19,591 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 112 [2020-10-27 00:16:19,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:19,605 INFO L225 Difference]: With dead ends: 2966 [2020-10-27 00:16:19,605 INFO L226 Difference]: Without dead ends: 1969 [2020-10-27 00:16:19,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:16:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2020-10-27 00:16:19,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1930. [2020-10-27 00:16:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-10-27 00:16:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2593 transitions. [2020-10-27 00:16:19,679 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2593 transitions. Word has length 112 [2020-10-27 00:16:19,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:19,679 INFO L481 AbstractCegarLoop]: Abstraction has 1930 states and 2593 transitions. [2020-10-27 00:16:19,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:16:19,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2593 transitions. [2020-10-27 00:16:19,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 00:16:19,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:19,682 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:16:19,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:16:19,683 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:19,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1255598343, now seen corresponding path program 1 times [2020-10-27 00:16:19,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:19,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255577885] [2020-10-27 00:16:19,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:19,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:20,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:20,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:20,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 00:16:20,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:16:20,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 737 [2020-10-27 00:16:20,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:20,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:16:20,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:16:20,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 00:16:20,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:20,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:16:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:20,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:20,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:20,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:16:20,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:20,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 00:16:20,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:20,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:16:20,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:20,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:16:20,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:20,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:16:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:20,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:20,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:20,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:16:20,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:20,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-27 00:16:20,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:20,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:16:20,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:20,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:16:20,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:16:21,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255577885] [2020-10-27 00:16:21,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:16:21,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:16:21,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077437719] [2020-10-27 00:16:21,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:16:21,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:16:21,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:16:21,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:16:21,196 INFO L87 Difference]: Start difference. First operand 1930 states and 2593 transitions. Second operand 8 states. [2020-10-27 00:16:22,005 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-27 00:16:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:39,923 INFO L93 Difference]: Finished difference Result 4373 states and 5787 transitions. [2020-10-27 00:16:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:16:39,925 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 115 [2020-10-27 00:16:39,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:39,946 INFO L225 Difference]: With dead ends: 4373 [2020-10-27 00:16:39,946 INFO L226 Difference]: Without dead ends: 2415 [2020-10-27 00:16:39,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:16:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2020-10-27 00:16:40,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2375. [2020-10-27 00:16:40,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2375 states. [2020-10-27 00:16:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 3055 transitions. [2020-10-27 00:16:40,064 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 3055 transitions. Word has length 115 [2020-10-27 00:16:40,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:40,067 INFO L481 AbstractCegarLoop]: Abstraction has 2375 states and 3055 transitions. [2020-10-27 00:16:40,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:16:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 3055 transitions. [2020-10-27 00:16:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-27 00:16:40,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:40,078 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:16:40,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:16:40,080 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:40,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:40,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1986549938, now seen corresponding path program 1 times [2020-10-27 00:16:40,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:40,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877311909] [2020-10-27 00:16:40,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:40,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:40,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:40,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-27 00:16:40,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:40,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-10-27 00:16:40,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:40,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:40,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:16:40,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 00:16:40,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:40,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:16:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:40,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:40,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:40,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:16:40,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:40,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 00:16:40,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:40,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:16:40,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:40,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:16:40,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:40,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:16:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:40,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:40,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:40,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:16:40,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:40,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-27 00:16:40,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:40,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:16:40,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:40,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:16:40,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:16:40,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877311909] [2020-10-27 00:16:40,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:16:40,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:16:40,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99675194] [2020-10-27 00:16:40,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:16:40,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:16:40,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:16:40,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:16:40,971 INFO L87 Difference]: Start difference. First operand 2375 states and 3055 transitions. Second operand 5 states. [2020-10-27 00:16:57,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:57,965 INFO L93 Difference]: Finished difference Result 6102 states and 8148 transitions. [2020-10-27 00:16:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:16:57,967 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-10-27 00:16:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:57,992 INFO L225 Difference]: With dead ends: 6102 [2020-10-27 00:16:57,993 INFO L226 Difference]: Without dead ends: 4166 [2020-10-27 00:16:58,000 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 00:16:58,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2020-10-27 00:16:58,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 4163. [2020-10-27 00:16:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4163 states. [2020-10-27 00:16:58,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 5243 transitions. [2020-10-27 00:16:58,131 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 5243 transitions. Word has length 128 [2020-10-27 00:16:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:58,132 INFO L481 AbstractCegarLoop]: Abstraction has 4163 states and 5243 transitions. [2020-10-27 00:16:58,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:16:58,132 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 5243 transitions. [2020-10-27 00:16:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-27 00:16:58,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:58,136 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:16:58,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:16:58,136 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:58,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:58,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1402383795, now seen corresponding path program 1 times [2020-10-27 00:16:58,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:58,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508097832] [2020-10-27 00:16:58,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:58,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:58,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:59,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:01,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:01,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-27 00:17:01,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:17:01,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2837 [2020-10-27 00:17:01,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:01,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:17:01,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:17:01,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-27 00:17:01,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:01,268 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:17:01,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:01,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:01,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:01,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:01,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:01,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 00:17:01,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:01,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:01,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:01,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:17:01,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:01,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:17:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:01,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:01,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:01,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:17:01,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:01,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-27 00:17:01,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:01,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:17:01,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:01,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:17:01,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:01,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:17:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:01,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:01,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:01,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:17:01,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:01,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 00:17:01,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:01,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:01,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:01,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:17:01,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 6 proven. 126 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:17:02,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508097832] [2020-10-27 00:17:02,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:17:02,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:17:02,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997243302] [2020-10-27 00:17:02,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:17:02,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:02,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:17:02,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:17:02,022 INFO L87 Difference]: Start difference. First operand 4163 states and 5243 transitions. Second operand 9 states. [2020-10-27 00:17:02,991 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:17:36,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:17:36,331 INFO L93 Difference]: Finished difference Result 11602 states and 16044 transitions. [2020-10-27 00:17:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 00:17:36,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 199 [2020-10-27 00:17:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:17:36,381 INFO L225 Difference]: With dead ends: 11602 [2020-10-27 00:17:36,381 INFO L226 Difference]: Without dead ends: 7880 [2020-10-27 00:17:36,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-27 00:17:36,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7880 states. [2020-10-27 00:17:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7880 to 7818. [2020-10-27 00:17:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7818 states. [2020-10-27 00:17:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7818 states to 7818 states and 10270 transitions. [2020-10-27 00:17:36,621 INFO L78 Accepts]: Start accepts. Automaton has 7818 states and 10270 transitions. Word has length 199 [2020-10-27 00:17:36,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:17:36,622 INFO L481 AbstractCegarLoop]: Abstraction has 7818 states and 10270 transitions. [2020-10-27 00:17:36,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:17:36,622 INFO L276 IsEmpty]: Start isEmpty. Operand 7818 states and 10270 transitions. [2020-10-27 00:17:36,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-27 00:17:36,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:36,626 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:17:36,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:17:36,626 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:36,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1262257723, now seen corresponding path program 1 times [2020-10-27 00:17:36,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:36,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765802855] [2020-10-27 00:17:36,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:36,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:36,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:36,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:41,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:41,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-27 00:17:41,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:17:41,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 00:17:41,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:41,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:17:41,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:17:41,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-27 00:17:41,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:41,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:41,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:41,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:41,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:41,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:41,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:17:41,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:41,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:17:41,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:41,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:17:41,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:41,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:17:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:41,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:42,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:42,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:17:42,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:42,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-27 00:17:42,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:42,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:42,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:42,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:17:42,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:42,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:17:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:42,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:42,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:42,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:42,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:17:42,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:17:42,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-27 00:17:42,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:42,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:42,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:42,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:17:42,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 143 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:17:42,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765802855] [2020-10-27 00:17:42,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:17:42,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:17:42,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387703516] [2020-10-27 00:17:42,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:17:42,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:42,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:17:42,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:17:42,594 INFO L87 Difference]: Start difference. First operand 7818 states and 10270 transitions. Second operand 6 states. [2020-10-27 00:17:58,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:17:58,819 INFO L93 Difference]: Finished difference Result 15714 states and 21275 transitions. [2020-10-27 00:17:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 00:17:58,822 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 214 [2020-10-27 00:17:58,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:17:58,876 INFO L225 Difference]: With dead ends: 15714 [2020-10-27 00:17:58,876 INFO L226 Difference]: Without dead ends: 8337 [2020-10-27 00:17:58,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:17:58,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8337 states. [2020-10-27 00:17:59,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8337 to 8295. [2020-10-27 00:17:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8295 states. [2020-10-27 00:17:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8295 states to 8295 states and 11043 transitions. [2020-10-27 00:17:59,174 INFO L78 Accepts]: Start accepts. Automaton has 8295 states and 11043 transitions. Word has length 214 [2020-10-27 00:17:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:17:59,175 INFO L481 AbstractCegarLoop]: Abstraction has 8295 states and 11043 transitions. [2020-10-27 00:17:59,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:17:59,175 INFO L276 IsEmpty]: Start isEmpty. Operand 8295 states and 11043 transitions. [2020-10-27 00:17:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-10-27 00:17:59,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:59,183 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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 00:17:59,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:17:59,183 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:59,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:59,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1708322050, now seen corresponding path program 1 times [2020-10-27 00:17:59,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:59,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090993702] [2020-10-27 00:17:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:59,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:59,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:59,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:01,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:02,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:03,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:04,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:04,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 292 [2020-10-27 00:18:04,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 00:18:04,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-27 00:18:04,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:04,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:04,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:18:04,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:18:04,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:18:04,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:04,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:04,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:04,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:04,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:04,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:18:04,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:04,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:18:04,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:04,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:18:04,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:04,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:18:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:04,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:04,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:04,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:18:04,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:04,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 00:18:04,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:04,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:18:04,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:04,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:18:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:04,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:04,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:04,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:18:04,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:04,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-27 00:18:04,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:04,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:04,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:04,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:18:04,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:04,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-10-27 00:18:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:04,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:04,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:04,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 00:18:04,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:04,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 00:18:04,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:04,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:18:04,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 00:18:04,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:18:04,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 171 proven. 70 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-27 00:18:05,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090993702] [2020-10-27 00:18:05,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:18:05,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:18:05,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504139561] [2020-10-27 00:18:05,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:18:05,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:05,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:18:05,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:18:05,059 INFO L87 Difference]: Start difference. First operand 8295 states and 11043 transitions. Second operand 7 states. [2020-10-27 00:18:13,543 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:18:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:18:33,095 INFO L93 Difference]: Finished difference Result 20247 states and 29589 transitions. [2020-10-27 00:18:33,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:18:33,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 276 [2020-10-27 00:18:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:18:33,157 INFO L225 Difference]: With dead ends: 20247 [2020-10-27 00:18:33,158 INFO L226 Difference]: Without dead ends: 12393 [2020-10-27 00:18:33,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:18:33,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12393 states. [2020-10-27 00:18:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12393 to 12148. [2020-10-27 00:18:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12148 states. [2020-10-27 00:18:33,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12148 states to 12148 states and 16148 transitions. [2020-10-27 00:18:33,569 INFO L78 Accepts]: Start accepts. Automaton has 12148 states and 16148 transitions. Word has length 276 [2020-10-27 00:18:33,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:18:33,570 INFO L481 AbstractCegarLoop]: Abstraction has 12148 states and 16148 transitions. [2020-10-27 00:18:33,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:18:33,570 INFO L276 IsEmpty]: Start isEmpty. Operand 12148 states and 16148 transitions. [2020-10-27 00:18:33,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-27 00:18:33,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:18:33,578 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:18:33,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:18:33,578 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:18:33,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:18:33,579 INFO L82 PathProgramCache]: Analyzing trace with hash -306718400, now seen corresponding path program 1 times [2020-10-27 00:18:33,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:18:33,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014425515] [2020-10-27 00:18:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:18:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:33,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:33,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:34,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:34,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:37,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:37,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-27 00:18:37,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:18:37,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4266 [2020-10-27 00:18:37,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:37,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:18:37,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:18:37,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 292 [2020-10-27 00:18:37,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:38,196 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:18:38,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:38,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:38,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:38,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:38,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:38,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:18:38,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:38,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:38,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:38,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:18:38,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:18:38,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:18:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:38,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:38,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:38,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:18:38,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:38,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-27 00:18:38,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:38,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:18:38,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:38,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:18:38,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:18:38,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:18:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:38,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:38,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:38,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:18:38,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:38,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-27 00:18:38,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:38,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:38,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:38,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:18:38,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:38,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:18:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:38,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:38,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:38,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:18:38,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:38,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-27 00:18:38,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:38,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:38,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:38,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:18:38,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 152 proven. 94 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 00:18:39,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014425515] [2020-10-27 00:18:39,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:18:39,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:18:39,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355453156] [2020-10-27 00:18:39,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:18:39,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:39,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:18:39,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:18:39,121 INFO L87 Difference]: Start difference. First operand 12148 states and 16148 transitions. Second operand 9 states. [2020-10-27 00:19:09,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:09,822 INFO L93 Difference]: Finished difference Result 39320 states and 56704 transitions. [2020-10-27 00:19:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 00:19:09,826 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 285 [2020-10-27 00:19:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:09,956 INFO L225 Difference]: With dead ends: 39320 [2020-10-27 00:19:09,956 INFO L226 Difference]: Without dead ends: 27613 [2020-10-27 00:19:09,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-27 00:19:10,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27613 states. [2020-10-27 00:19:10,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27613 to 24682. [2020-10-27 00:19:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24682 states. [2020-10-27 00:19:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24682 states to 24682 states and 32850 transitions. [2020-10-27 00:19:10,888 INFO L78 Accepts]: Start accepts. Automaton has 24682 states and 32850 transitions. Word has length 285 [2020-10-27 00:19:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:10,889 INFO L481 AbstractCegarLoop]: Abstraction has 24682 states and 32850 transitions. [2020-10-27 00:19:10,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:19:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 24682 states and 32850 transitions. [2020-10-27 00:19:10,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-10-27 00:19:10,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:10,899 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:19:10,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:19:10,899 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:10,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:10,900 INFO L82 PathProgramCache]: Analyzing trace with hash 2031797021, now seen corresponding path program 1 times [2020-10-27 00:19:10,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:10,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859098640] [2020-10-27 00:19:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:10,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:11,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:11,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:11,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:14,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:15,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:15,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-27 00:19:15,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:19:15,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 00:19:15,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:15,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:19:15,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:19:15,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-27 00:19:15,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:16,158 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:19:16,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:16,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:16,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:16,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:16,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:16,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 00:19:16,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:16,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:16,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:16,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:19:16,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:16,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:16,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:16,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:16,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 00:19:16,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:16,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-27 00:19:16,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:16,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:16,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:16,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 00:19:16,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:16,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-27 00:19:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:16,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:16,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:16,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:19:16,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:16,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-27 00:19:16,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:16,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:19:16,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:19:16,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:19:16,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:16,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-10-27 00:19:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:16,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:16,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:16,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 00:19:16,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:16,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 00:19:16,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:16,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:19:16,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 00:19:16,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:19:16,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 99 proven. 138 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 00:19:16,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859098640] [2020-10-27 00:19:16,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:19:16,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:19:16,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729197094] [2020-10-27 00:19:16,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:19:16,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:16,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:19:16,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:19:16,873 INFO L87 Difference]: Start difference. First operand 24682 states and 32850 transitions. Second operand 7 states. [2020-10-27 00:19:17,040 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66