/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 13:40:12,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 13:40:12,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 13:40:12,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 13:40:12,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 13:40:12,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 13:40:12,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 13:40:12,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 13:40:12,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 13:40:12,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 13:40:12,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 13:40:12,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 13:40:12,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 13:40:12,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 13:40:12,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 13:40:12,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 13:40:12,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 13:40:12,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 13:40:12,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 13:40:12,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 13:40:12,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 13:40:12,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 13:40:12,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 13:40:12,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 13:40:12,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 13:40:12,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 13:40:12,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 13:40:12,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 13:40:12,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 13:40:12,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 13:40:12,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 13:40:12,848 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 13:40:12,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 13:40:12,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 13:40:12,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 13:40:12,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 13:40:12,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 13:40:12,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 13:40:12,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 13:40:12,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 13:40:12,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 13:40:12,858 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 13:40:12,923 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 13:40:12,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 13:40:12,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 13:40:12,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 13:40:12,929 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 13:40:12,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 13:40:12,930 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 13:40:12,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 13:40:12,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 13:40:12,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 13:40:12,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 13:40:12,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 13:40:12,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 13:40:12,933 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 13:40:12,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 13:40:12,933 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 13:40:12,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 13:40:12,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 13:40:12,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 13:40:12,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 13:40:12,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 13:40:12,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:40:12,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 13:40:12,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 13:40:12,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 13:40:12,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 13:40:12,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 13:40:12,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 13:40:12,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 13:40:12,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 13:40:13,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 13:40:13,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 13:40:13,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 13:40:13,405 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 13:40:13,406 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 13:40:13,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label41.c [2020-10-28 13:40:13,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ebab2406/e9b79f1e9c1a44e5a71ec6883e84dffa/FLAG6674dfbb9 [2020-10-28 13:40:14,493 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 13:40:14,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label41.c [2020-10-28 13:40:14,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ebab2406/e9b79f1e9c1a44e5a71ec6883e84dffa/FLAG6674dfbb9 [2020-10-28 13:40:15,030 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ebab2406/e9b79f1e9c1a44e5a71ec6883e84dffa [2020-10-28 13:40:15,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 13:40:15,043 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 13:40:15,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 13:40:15,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 13:40:15,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 13:40:15,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:40:15" (1/1) ... [2020-10-28 13:40:15,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2251289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:40:15, skipping insertion in model container [2020-10-28 13:40:15,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:40:15" (1/1) ... [2020-10-28 13:40:15,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 13:40:15,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 13:40:16,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:40:16,389 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 13:40:16,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:40:16,930 INFO L208 MainTranslator]: Completed translation [2020-10-28 13:40:16,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:40:16 WrapperNode [2020-10-28 13:40:16,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 13:40:16,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 13:40:16,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 13:40:16,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 13:40:16,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:40:16" (1/1) ... [2020-10-28 13:40:16,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:40:16" (1/1) ... [2020-10-28 13:40:17,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:40:16" (1/1) ... [2020-10-28 13:40:17,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:40:16" (1/1) ... [2020-10-28 13:40:17,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:40:16" (1/1) ... [2020-10-28 13:40:17,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:40:16" (1/1) ... [2020-10-28 13:40:17,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:40:16" (1/1) ... [2020-10-28 13:40:17,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 13:40:17,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 13:40:17,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 13:40:17,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 13:40:17,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:40:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:40:17,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 13:40:17,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 13:40:17,388 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 13:40:17,388 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 13:40:17,388 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 13:40:17,388 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 13:40:17,389 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 13:40:17,389 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 13:40:17,389 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 13:40:17,389 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 13:40:17,389 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 13:40:17,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 13:40:17,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 13:40:17,390 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 13:40:17,390 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 13:40:17,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 13:40:17,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 13:40:17,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 13:40:17,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 13:40:17,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 13:40:17,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 13:40:27,812 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 13:40:27,813 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 13:40:27,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:40:27 BoogieIcfgContainer [2020-10-28 13:40:27,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 13:40:27,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 13:40:27,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 13:40:27,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 13:40:27,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:40:15" (1/3) ... [2020-10-28 13:40:27,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45dcbcb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:40:27, skipping insertion in model container [2020-10-28 13:40:27,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:40:16" (2/3) ... [2020-10-28 13:40:27,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45dcbcb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:40:27, skipping insertion in model container [2020-10-28 13:40:27,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:40:27" (3/3) ... [2020-10-28 13:40:27,826 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label41.c [2020-10-28 13:40:27,840 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 13:40:27,847 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 13:40:27,864 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 13:40:27,902 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 13:40:27,903 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 13:40:27,903 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 13:40:27,903 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 13:40:27,903 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 13:40:27,904 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 13:40:27,904 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 13:40:27,904 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 13:40:27,940 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-28 13:40:27,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 13:40:27,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:40:27,950 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] [2020-10-28 13:40:27,951 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:40:27,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:40:27,958 INFO L82 PathProgramCache]: Analyzing trace with hash -956596429, now seen corresponding path program 1 times [2020-10-28 13:40:27,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:40:27,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223867926] [2020-10-28 13:40:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:40:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:40:28,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:28,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:40:28,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 13:40:28,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:40:28,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-28 13:40:28,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:40:28,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:40:28,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:40:28,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:40:28,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 13:40:28,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 13:40:29,067 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 13:40:29,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:40:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:40:29,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:29,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:40:29,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:40:29,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:40:29,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 13:40:29,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:40:29,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:40:29,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:40:29,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:40:29,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:40:29,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:40:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:40:29,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223867926] [2020-10-28 13:40:29,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:40:29,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 13:40:29,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439583931] [2020-10-28 13:40:29,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 13:40:29,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:40:29,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 13:40:29,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 13:40:29,154 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-28 13:40:29,330 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 13:40:42,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:40:42,799 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-28 13:40:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:40:42,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-28 13:40:42,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:40:42,829 INFO L225 Difference]: With dead ends: 1697 [2020-10-28 13:40:42,829 INFO L226 Difference]: Without dead ends: 1013 [2020-10-28 13:40:42,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:40:42,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-28 13:40:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-28 13:40:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-28 13:40:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-28 13:40:43,008 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 41 [2020-10-28 13:40:43,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:40:43,011 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-28 13:40:43,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 13:40:43,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-28 13:40:43,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 13:40:43,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:40:43,022 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] [2020-10-28 13:40:43,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 13:40:43,023 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:40:43,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:40:43,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1641944046, now seen corresponding path program 1 times [2020-10-28 13:40:43,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:40:43,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143400736] [2020-10-28 13:40:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:40:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:40:43,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:43,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:44,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:45,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:40:45,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 13:40:45,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:40:45,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1907 [2020-10-28 13:40:45,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:40:45,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:40:45,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:40:45,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:40:45,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 13:40:45,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 13:40:45,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:40:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:40:45,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:45,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:40:45,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:40:45,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:40:45,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 13:40:45,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:40:45,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:40:45,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:40:45,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:40:45,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:40:45,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:40:45,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:40:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:40:45,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:45,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:40:45,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 13:40:45,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:40:45,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-28 13:40:45,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:40:45,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:40:45,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:40:45,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:40:45,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 13:40:45,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:40:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:40:45,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143400736] [2020-10-28 13:40:45,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:40:45,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:40:45,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506768586] [2020-10-28 13:40:45,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:40:45,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:40:45,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:40:45,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:40:45,658 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 7 states. [2020-10-28 13:41:02,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:41:02,159 INFO L93 Difference]: Finished difference Result 2931 states and 4531 transitions. [2020-10-28 13:41:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:41:02,166 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 112 [2020-10-28 13:41:02,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:41:02,184 INFO L225 Difference]: With dead ends: 2931 [2020-10-28 13:41:02,184 INFO L226 Difference]: Without dead ends: 1934 [2020-10-28 13:41:02,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:41:02,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2020-10-28 13:41:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 1902. [2020-10-28 13:41:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-10-28 13:41:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 2466 transitions. [2020-10-28 13:41:02,296 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 2466 transitions. Word has length 112 [2020-10-28 13:41:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:41:02,298 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 2466 transitions. [2020-10-28 13:41:02,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:41:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 2466 transitions. [2020-10-28 13:41:02,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 13:41:02,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:41:02,312 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] [2020-10-28 13:41:02,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 13:41:02,313 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:41:02,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:41:02,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1255598343, now seen corresponding path program 1 times [2020-10-28 13:41:02,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:41:02,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156853695] [2020-10-28 13:41:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:41:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:02,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:02,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:03,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:03,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 13:41:03,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:41:03,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 900 [2020-10-28 13:41:03,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:03,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:03,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:41:03,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-28 13:41:03,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 13:41:03,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:41:03,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:41:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:03,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:03,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:03,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:41:03,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:41:03,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 13:41:03,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:03,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:03,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:41:03,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:41:03,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:41:03,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:41:03,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:41:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:03,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:03,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:03,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 13:41:03,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:41:03,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-28 13:41:03,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:03,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:03,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:41:03,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:41:03,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 13:41:03,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:41:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:41:03,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156853695] [2020-10-28 13:41:03,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:41:03,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:41:03,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743653151] [2020-10-28 13:41:03,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:41:03,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:41:03,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:41:03,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:41:03,741 INFO L87 Difference]: Start difference. First operand 1902 states and 2466 transitions. Second operand 5 states. [2020-10-28 13:41:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:41:22,258 INFO L93 Difference]: Finished difference Result 4703 states and 6248 transitions. [2020-10-28 13:41:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:41:22,260 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2020-10-28 13:41:22,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:41:22,280 INFO L225 Difference]: With dead ends: 4703 [2020-10-28 13:41:22,280 INFO L226 Difference]: Without dead ends: 2361 [2020-10-28 13:41:22,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:41:22,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2020-10-28 13:41:22,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2355. [2020-10-28 13:41:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2355 states. [2020-10-28 13:41:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 2892 transitions. [2020-10-28 13:41:22,413 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 2892 transitions. Word has length 115 [2020-10-28 13:41:22,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:41:22,421 INFO L481 AbstractCegarLoop]: Abstraction has 2355 states and 2892 transitions. [2020-10-28 13:41:22,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:41:22,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 2892 transitions. [2020-10-28 13:41:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-28 13:41:22,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:41:22,425 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:41:22,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 13:41:22,426 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:41:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:41:22,427 INFO L82 PathProgramCache]: Analyzing trace with hash -250718057, now seen corresponding path program 1 times [2020-10-28 13:41:22,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:41:22,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436404079] [2020-10-28 13:41:22,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:41:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:22,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:22,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:23,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:23,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-28 13:41:23,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:41:23,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1229 [2020-10-28 13:41:23,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:23,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:23,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:41:23,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:41:23,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 13:41:23,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:41:23,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:41:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:23,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:23,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:23,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:41:23,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:41:23,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:41:23,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:23,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:23,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:41:23,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:41:23,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:41:23,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:41:23,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:41:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:23,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:24,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:24,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:41:24,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:41:24,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-28 13:41:24,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:24,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:24,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:41:24,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:41:24,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:41:24,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 13:41:24,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:41:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:24,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:24,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:24,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 13:41:24,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:41:24,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-28 13:41:24,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:24,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:24,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:41:24,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:41:24,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 13:41:24,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:41:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 136 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:41:24,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436404079] [2020-10-28 13:41:24,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:41:24,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 13:41:24,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233083504] [2020-10-28 13:41:24,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:41:24,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:41:24,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:41:24,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:41:24,572 INFO L87 Difference]: Start difference. First operand 2355 states and 2892 transitions. Second operand 8 states. [2020-10-28 13:41:40,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:41:40,160 INFO L93 Difference]: Finished difference Result 6084 states and 7735 transitions. [2020-10-28 13:41:40,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:41:40,162 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 201 [2020-10-28 13:41:40,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:41:40,192 INFO L225 Difference]: With dead ends: 6084 [2020-10-28 13:41:40,192 INFO L226 Difference]: Without dead ends: 3735 [2020-10-28 13:41:40,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 13:41:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2020-10-28 13:41:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 3722. [2020-10-28 13:41:40,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3722 states. [2020-10-28 13:41:40,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 4570 transitions. [2020-10-28 13:41:40,389 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 4570 transitions. Word has length 201 [2020-10-28 13:41:40,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:41:40,391 INFO L481 AbstractCegarLoop]: Abstraction has 3722 states and 4570 transitions. [2020-10-28 13:41:40,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:41:40,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 4570 transitions. [2020-10-28 13:41:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-28 13:41:40,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:41:40,396 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:41:40,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 13:41:40,396 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:41:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:41:40,397 INFO L82 PathProgramCache]: Analyzing trace with hash 272505723, now seen corresponding path program 1 times [2020-10-28 13:41:40,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:41:40,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379082355] [2020-10-28 13:41:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:41:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:40,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:40,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:41,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:43,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:45,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:45,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-28 13:41:45,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:41:45,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 13:41:45,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:45,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:45,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:41:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-28 13:41:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 13:41:45,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:41:45,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:41:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:45,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:45,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:45,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:41:45,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:41:45,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:41:45,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:45,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:45,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:41:45,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:41:45,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:41:45,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:41:45,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:41:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:45,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:45,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:45,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:41:45,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:41:45,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 13:41:45,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:45,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:45,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:41:45,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:41:45,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:41:45,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:41:45,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:41:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:45,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:45,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:45,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 13:41:45,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:41:45,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-28 13:41:45,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:45,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:45,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:41:45,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:41:45,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 13:41:45,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:41:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 13:41:46,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379082355] [2020-10-28 13:41:46,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:41:46,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:41:46,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694085533] [2020-10-28 13:41:46,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:41:46,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:41:46,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:41:46,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:41:46,091 INFO L87 Difference]: Start difference. First operand 3722 states and 4570 transitions. Second operand 5 states. [2020-10-28 13:41:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:41:59,136 INFO L93 Difference]: Finished difference Result 10517 states and 13099 transitions. [2020-10-28 13:41:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:41:59,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 203 [2020-10-28 13:41:59,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:41:59,187 INFO L225 Difference]: With dead ends: 10517 [2020-10-28 13:41:59,187 INFO L226 Difference]: Without dead ends: 6800 [2020-10-28 13:41:59,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:41:59,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6800 states. [2020-10-28 13:41:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6800 to 5930. [2020-10-28 13:41:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5930 states. [2020-10-28 13:41:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5930 states to 5930 states and 7129 transitions. [2020-10-28 13:41:59,398 INFO L78 Accepts]: Start accepts. Automaton has 5930 states and 7129 transitions. Word has length 203 [2020-10-28 13:41:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:41:59,398 INFO L481 AbstractCegarLoop]: Abstraction has 5930 states and 7129 transitions. [2020-10-28 13:41:59,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:41:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 5930 states and 7129 transitions. [2020-10-28 13:41:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-28 13:41:59,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:41:59,403 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] [2020-10-28 13:41:59,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 13:41:59,403 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:41:59,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:41:59,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1262257723, now seen corresponding path program 1 times [2020-10-28 13:41:59,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:41:59,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872827244] [2020-10-28 13:41:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:41:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:59,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:59,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:59,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:04,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:04,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-28 13:42:04,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:42:04,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 13:42:04,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:04,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:04,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:42:04,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:42:04,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-28 13:42:04,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:42:04,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:42:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:04,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:04,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:04,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:42:04,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:42:04,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:42:04,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:04,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:04,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:42:04,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:42:04,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:42:04,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:42:04,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:42:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:04,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:04,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:04,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:42:04,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:42:04,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-28 13:42:04,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:04,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:04,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:42:04,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:42:04,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:42:04,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:42:04,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:42:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:04,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:05,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:05,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:05,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 13:42:05,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:42:05,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-28 13:42:05,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:05,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:05,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:42:05,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:42:05,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:42:05,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:42:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-28 13:42:05,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872827244] [2020-10-28 13:42:05,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:42:05,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:42:05,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111904003] [2020-10-28 13:42:05,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:42:05,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:42:05,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:42:05,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:42:05,313 INFO L87 Difference]: Start difference. First operand 5930 states and 7129 transitions. Second operand 5 states. [2020-10-28 13:42:18,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:42:18,052 INFO L93 Difference]: Finished difference Result 12724 states and 15614 transitions. [2020-10-28 13:42:18,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:42:18,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2020-10-28 13:42:18,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:42:18,090 INFO L225 Difference]: With dead ends: 12724 [2020-10-28 13:42:18,090 INFO L226 Difference]: Without dead ends: 6800 [2020-10-28 13:42:18,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:42:18,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6800 states. [2020-10-28 13:42:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6800 to 6796. [2020-10-28 13:42:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6796 states. [2020-10-28 13:42:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 8282 transitions. [2020-10-28 13:42:18,290 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 8282 transitions. Word has length 214 [2020-10-28 13:42:18,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:42:18,290 INFO L481 AbstractCegarLoop]: Abstraction has 6796 states and 8282 transitions. [2020-10-28 13:42:18,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:42:18,291 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 8282 transitions. [2020-10-28 13:42:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-28 13:42:18,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:42:18,297 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] [2020-10-28 13:42:18,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 13:42:18,297 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:42:18,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:42:18,298 INFO L82 PathProgramCache]: Analyzing trace with hash -306718400, now seen corresponding path program 1 times [2020-10-28 13:42:18,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:42:18,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372211016] [2020-10-28 13:42:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:42:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:18,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:18,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:18,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:19,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:23,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:23,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-28 13:42:23,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:42:23,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 13:42:23,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:23,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:23,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:42:23,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-28 13:42:23,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 13:42:23,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:42:23,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:42:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:23,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:23,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:23,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:42:23,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:42:23,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:42:23,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:23,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:23,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:42:23,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:42:23,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:42:23,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:42:23,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:42:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:23,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:23,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:23,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:42:23,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:42:23,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-28 13:42:23,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:23,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:23,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:42:23,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:42:23,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:42:23,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:42:23,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:42:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:23,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:23,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:23,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 13:42:23,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:42:23,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-28 13:42:23,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:23,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:23,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:42:23,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:42:23,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:42:23,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:42:23,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-28 13:42:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:23,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:23,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:24,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:24,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 13:42:24,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:42:24,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-28 13:42:24,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:24,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:24,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:42:24,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:42:24,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 13:42:24,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:42:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-10-28 13:42:24,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372211016] [2020-10-28 13:42:24,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:42:24,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:42:24,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818636467] [2020-10-28 13:42:24,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:42:24,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:42:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:42:24,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:42:24,156 INFO L87 Difference]: Start difference. First operand 6796 states and 8282 transitions. Second operand 5 states. [2020-10-28 13:42:40,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:42:40,096 INFO L93 Difference]: Finished difference Result 16663 states and 20585 transitions. [2020-10-28 13:42:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:42:40,104 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 285 [2020-10-28 13:42:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:42:40,143 INFO L225 Difference]: With dead ends: 16663 [2020-10-28 13:42:40,143 INFO L226 Difference]: Without dead ends: 8988 [2020-10-28 13:42:40,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:42:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8988 states. [2020-10-28 13:42:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8988 to 8981. [2020-10-28 13:42:40,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8981 states. [2020-10-28 13:42:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8981 states to 8981 states and 10502 transitions. [2020-10-28 13:42:40,373 INFO L78 Accepts]: Start accepts. Automaton has 8981 states and 10502 transitions. Word has length 285 [2020-10-28 13:42:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:42:40,374 INFO L481 AbstractCegarLoop]: Abstraction has 8981 states and 10502 transitions. [2020-10-28 13:42:40,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:42:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 8981 states and 10502 transitions. [2020-10-28 13:42:40,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 13:42:40,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:42:40,382 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 13:42:40,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 13:42:40,382 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:42:40,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:42:40,383 INFO L82 PathProgramCache]: Analyzing trace with hash 114728701, now seen corresponding path program 1 times [2020-10-28 13:42:40,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:42:40,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747614991] [2020-10-28 13:42:40,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:42:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:40,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:40,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:42,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:43,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:43,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-28 13:42:43,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:42:43,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3049 [2020-10-28 13:42:43,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:43,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:43,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:42:43,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:42:43,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 13:42:43,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:42:43,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:42:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:43,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:43,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:43,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:42:43,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:42:43,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:42:43,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:43,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:42:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:42:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:42:43,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:42:43,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:42:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:43,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:43,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:43,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:42:43,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:42:43,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 13:42:43,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:43,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:43,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:42:43,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:42:43,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:42:43,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:42:43,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:42:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:43,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:44,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:44,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 13:42:44,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:42:44,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-28 13:42:44,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:44,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:42:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:42:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 13:42:44,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:42:44,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-28 13:42:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:44,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:44,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:44,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 13:42:44,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:42:44,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-28 13:42:44,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:44,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:44,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:42:44,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-28 13:42:44,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:42:44,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:42:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 187 proven. 87 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-28 13:42:44,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747614991] [2020-10-28 13:42:44,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:42:44,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:42:44,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156877847] [2020-10-28 13:42:44,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:42:44,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:42:44,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:42:44,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:42:44,798 INFO L87 Difference]: Start difference. First operand 8981 states and 10502 transitions. Second operand 7 states. [2020-10-28 13:42:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:42:57,610 INFO L93 Difference]: Finished difference Result 19380 states and 22698 transitions. [2020-10-28 13:42:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:42:57,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 325 [2020-10-28 13:42:57,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:42:57,718 INFO L225 Difference]: With dead ends: 19380 [2020-10-28 13:42:57,718 INFO L226 Difference]: Without dead ends: 10405 [2020-10-28 13:42:57,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 13:42:57,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10405 states. [2020-10-28 13:42:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10405 to 10395. [2020-10-28 13:42:57,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10395 states. [2020-10-28 13:42:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10395 states to 10395 states and 12166 transitions. [2020-10-28 13:42:57,962 INFO L78 Accepts]: Start accepts. Automaton has 10395 states and 12166 transitions. Word has length 325 [2020-10-28 13:42:57,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:42:57,963 INFO L481 AbstractCegarLoop]: Abstraction has 10395 states and 12166 transitions. [2020-10-28 13:42:57,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:42:57,963 INFO L276 IsEmpty]: Start isEmpty. Operand 10395 states and 12166 transitions. [2020-10-28 13:42:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-10-28 13:42:57,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:42:57,973 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:42:57,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 13:42:57,973 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:42:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:42:57,974 INFO L82 PathProgramCache]: Analyzing trace with hash 293830901, now seen corresponding path program 1 times [2020-10-28 13:42:57,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:42:57,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167480411] [2020-10-28 13:42:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:42:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:58,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:59,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:59,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 352 [2020-10-28 13:42:59,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:42:59,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1553 [2020-10-28 13:42:59,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:59,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:59,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 13:42:59,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:42:59,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 305 [2020-10-28 13:42:59,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:42:59,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:42:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:59,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:42:59,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:42:59,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:42:59,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:42:59,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 13:42:59,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:42:59,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:42:59,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:42:59,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:42:59,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:42:59,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:42:59,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:42:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:42:59,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:43:00,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:43:00,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:43:00,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:43:00,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-28 13:43:00,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:43:00,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:43:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 13:43:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:43:00,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 13:43:00,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:43:00,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:43:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:43:00,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:43:00,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:43:00,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-28 13:43:00,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:43:00,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-28 13:43:00,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:43:00,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:43:00,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:43:00,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:43:00,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-10-28 13:43:00,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:43:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:43:01,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167480411] [2020-10-28 13:43:01,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:43:01,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 13:43:01,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613936748] [2020-10-28 13:43:01,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 13:43:01,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:43:01,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 13:43:01,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-28 13:43:01,093 INFO L87 Difference]: Start difference. First operand 10395 states and 12166 transitions. Second operand 10 states. [2020-10-28 13:43:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:43:26,399 INFO L93 Difference]: Finished difference Result 33504 states and 41211 transitions. [2020-10-28 13:43:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 13:43:26,403 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 338 [2020-10-28 13:43:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:43:26,517 INFO L225 Difference]: With dead ends: 33504 [2020-10-28 13:43:26,517 INFO L226 Difference]: Without dead ends: 22654 [2020-10-28 13:43:26,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-28 13:43:26,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22654 states. [2020-10-28 13:43:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22654 to 19866. [2020-10-28 13:43:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19866 states. [2020-10-28 13:43:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19866 states to 19866 states and 23676 transitions. [2020-10-28 13:43:27,265 INFO L78 Accepts]: Start accepts. Automaton has 19866 states and 23676 transitions. Word has length 338 [2020-10-28 13:43:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:43:27,266 INFO L481 AbstractCegarLoop]: Abstraction has 19866 states and 23676 transitions. [2020-10-28 13:43:27,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 13:43:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 19866 states and 23676 transitions. [2020-10-28 13:43:27,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-10-28 13:43:27,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:43:27,277 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:43:27,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 13:43:27,278 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:43:27,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:43:27,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1378151242, now seen corresponding path program 1 times [2020-10-28 13:43:27,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:43:27,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207492943] [2020-10-28 13:43:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:43:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:43:27,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:43:27,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:43:27,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:43:30,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:43:32,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:43:32,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 384 [2020-10-28 13:43:32,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:43:32,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-28 13:43:32,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:43:32,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:43:32,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:43:32,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 251 [2020-10-28 13:43:32,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 13:43:32,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:43:32,705 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 13:43:32,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:43:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:43:32,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:43:32,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:43:32,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:43:32,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:43:32,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 13:43:32,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:43:32,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:43:32,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:43:32,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:43:32,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:43:32,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:43:32,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:43:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:43:32,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:43:32,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:43:32,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:43:32,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:43:32,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 13:43:32,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:43:32,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:43:32,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:43:32,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:43:32,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:43:32,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:43:32,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:43:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:43:32,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:43:33,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:43:33,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-28 13:43:33,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:43:33,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-28 13:43:33,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:43:33,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:43:33,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:43:33,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:43:33,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-28 13:43:33,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:43:33,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-28 13:43:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:43:33,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:43:33,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:43:33,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:43:33,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 13:43:33,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:43:33,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-28 13:43:33,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:43:33,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:43:33,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:43:33,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:43:33,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-28 13:43:33,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:43:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 237 proven. 34 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-28 13:43:33,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207492943] [2020-10-28 13:43:33,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:43:33,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:43:33,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563163693] [2020-10-28 13:43:33,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:43:33,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:43:33,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:43:33,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:43:33,728 INFO L87 Difference]: Start difference. First operand 19866 states and 23676 transitions. Second operand 7 states. [2020-10-28 13:43:41,988 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66