/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/array-examples/standard_copy5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:54:50,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:54:50,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:54:50,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:54:50,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:54:50,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:54:50,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:54:50,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:54:50,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:54:50,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:54:50,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:54:50,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:54:50,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:54:50,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:54:50,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:54:50,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:54:50,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:54:50,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:54:50,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:54:50,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:54:50,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:54:50,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:54:50,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:54:50,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:54:50,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:54:50,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:54:50,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:54:50,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:54:50,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:54:50,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:54:50,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:54:50,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:54:50,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:54:50,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:54:50,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:54:50,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:54:50,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:54:50,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:54:50,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:54:50,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:54:50,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:54:50,901 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 08:54:50,954 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:54:50,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:54:50,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:54:50,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:54:50,959 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:54:50,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:54:50,959 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:54:50,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:54:50,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:54:50,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:54:50,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:54:50,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:54:50,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:54:50,962 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:54:50,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:54:50,962 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:54:50,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:54:50,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:54:50,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:54:50,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:54:50,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:54:50,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:54:50,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:54:50,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:54:50,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:54:50,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:54:50,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:54:50,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:54:50,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:54:50,965 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:54:51,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:54:51,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:54:51,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:54:51,404 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:54:51,404 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:54:51,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-1.i [2020-10-28 08:54:51,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70922d64b/4378b7b469d54e88bafb15cc95182847/FLAGb1ab275d6 [2020-10-28 08:54:52,140 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:54:52,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy5_ground-1.i [2020-10-28 08:54:52,149 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70922d64b/4378b7b469d54e88bafb15cc95182847/FLAGb1ab275d6 [2020-10-28 08:54:52,481 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70922d64b/4378b7b469d54e88bafb15cc95182847 [2020-10-28 08:54:52,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:54:52,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:54:52,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:54:52,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:54:52,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:54:52,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:54:52" (1/1) ... [2020-10-28 08:54:52,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d4595d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:52, skipping insertion in model container [2020-10-28 08:54:52,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:54:52" (1/1) ... [2020-10-28 08:54:52,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:54:52,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:54:52,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:54:52,717 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:54:52,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:54:52,764 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:54:52,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:52 WrapperNode [2020-10-28 08:54:52,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:54:52,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:54:52,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:54:52,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:54:52,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:52" (1/1) ... [2020-10-28 08:54:52,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:52" (1/1) ... [2020-10-28 08:54:52,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:52" (1/1) ... [2020-10-28 08:54:52,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:52" (1/1) ... [2020-10-28 08:54:52,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:52" (1/1) ... [2020-10-28 08:54:52,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:52" (1/1) ... [2020-10-28 08:54:52,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:52" (1/1) ... [2020-10-28 08:54:52,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:54:52,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:54:52,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:54:52,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:54:52,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:52" (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 08:54:52,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:54:52,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:54:52,898 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:54:52,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:54:52,899 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:54:52,899 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:54:52,899 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:54:52,899 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:54:52,899 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:54:52,900 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:54:52,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:54:52,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:54:52,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:54:52,901 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:54:52,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:54:52,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:54:52,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:54:52,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:54:52,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:54:52,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:54:53,419 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:54:53,420 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-28 08:54:53,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:54:53 BoogieIcfgContainer [2020-10-28 08:54:53,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:54:53,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:54:53,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:54:53,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:54:53,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:54:52" (1/3) ... [2020-10-28 08:54:53,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c27c9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:54:53, skipping insertion in model container [2020-10-28 08:54:53,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:52" (2/3) ... [2020-10-28 08:54:53,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c27c9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:54:53, skipping insertion in model container [2020-10-28 08:54:53,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:54:53" (3/3) ... [2020-10-28 08:54:53,443 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-1.i [2020-10-28 08:54:53,461 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:54:53,468 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:54:53,488 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:54:53,539 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:54:53,539 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:54:53,539 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:54:53,540 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:54:53,540 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:54:53,540 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:54:53,540 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:54:53,540 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:54:53,563 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-28 08:54:53,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 08:54:53,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:53,574 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] [2020-10-28 08:54:53,575 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:53,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:53,585 INFO L82 PathProgramCache]: Analyzing trace with hash 235794212, now seen corresponding path program 1 times [2020-10-28 08:54:53,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:53,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028556143] [2020-10-28 08:54:53,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:53,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:53,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:53,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:53,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:54,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:54,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:54,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:54,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 08:54:54,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:54:54,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1134 [2020-10-28 08:54:54,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:54,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:54,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:54,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 08:54:54,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:54,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:54:55,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:55,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:55,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:55,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:55,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:55,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 08:54:55,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:55,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:55,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:55,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:55,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:55,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:54:55,044 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 08:54:55,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028556143] [2020-10-28 08:54:55,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:54:55,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:54:55,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953262651] [2020-10-28 08:54:55,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:54:55,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:55,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:54:55,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:54:55,072 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-10-28 08:54:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:55,249 INFO L93 Difference]: Finished difference Result 77 states and 107 transitions. [2020-10-28 08:54:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:54:55,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-28 08:54:55,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:55,259 INFO L225 Difference]: With dead ends: 77 [2020-10-28 08:54:55,259 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 08:54:55,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:54:55,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 08:54:55,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-28 08:54:55,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 08:54:55,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 08:54:55,308 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 25 [2020-10-28 08:54:55,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:55,309 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 08:54:55,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:54:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 08:54:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 08:54:55,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:55,310 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] [2020-10-28 08:54:55,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:54:55,311 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:55,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:55,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1022358290, now seen corresponding path program 1 times [2020-10-28 08:54:55,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:55,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662585428] [2020-10-28 08:54:55,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:55,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:55,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:55,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:55,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:55,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:55,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:57,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:57,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 08:54:57,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:54:57,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1897 [2020-10-28 08:54:57,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:57,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:57,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:54:57,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:54:57,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:54:57,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:54:57,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:57,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:57,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:57,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:57,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:57,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:54:57,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:57,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:57,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:57,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:57,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 08:54:57,367 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 08:54:57,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662585428] [2020-10-28 08:54:57,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:54:57,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:54:57,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306490618] [2020-10-28 08:54:57,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:54:57,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:57,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:54:57,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:54:57,384 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 4 states. [2020-10-28 08:54:57,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:57,651 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2020-10-28 08:54:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:54:57,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-28 08:54:57,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:57,653 INFO L225 Difference]: With dead ends: 71 [2020-10-28 08:54:57,653 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 08:54:57,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:54:57,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 08:54:57,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-28 08:54:57,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 08:54:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-28 08:54:57,665 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 25 [2020-10-28 08:54:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:57,665 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-28 08:54:57,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:54:57,666 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-28 08:54:57,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 08:54:57,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:57,667 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] [2020-10-28 08:54:57,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:54:57,668 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:57,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1644726824, now seen corresponding path program 1 times [2020-10-28 08:54:57,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:57,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327622959] [2020-10-28 08:54:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:57,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:57,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:57,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:57,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:57,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:57,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:02,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:02,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 08:55:02,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:02,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:55:02,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:02,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:02,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:55:02,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:55:02,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:55:02,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:02,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:02,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:02,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:02,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:02,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:02,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:02,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:02,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:02,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:02,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:02,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:02,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:55:02,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327622959] [2020-10-28 08:55:02,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:02,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:55:02,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556052896] [2020-10-28 08:55:02,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:55:02,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:02,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:55:02,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:02,773 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 5 states. [2020-10-28 08:55:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:03,006 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2020-10-28 08:55:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:55:03,007 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-28 08:55:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:03,008 INFO L225 Difference]: With dead ends: 85 [2020-10-28 08:55:03,009 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 08:55:03,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:03,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 08:55:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-10-28 08:55:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 08:55:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-28 08:55:03,020 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 35 [2020-10-28 08:55:03,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:03,020 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-28 08:55:03,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:55:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-28 08:55:03,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:55:03,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:03,022 INFO L422 BasicCegarLoop]: trace histogram [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 08:55:03,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:55:03,022 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:03,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:03,023 INFO L82 PathProgramCache]: Analyzing trace with hash -576553538, now seen corresponding path program 2 times [2020-10-28 08:55:03,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:03,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559190360] [2020-10-28 08:55:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:03,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:03,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:03,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:03,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:03,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:04,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:08,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 08:55:08,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:08,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:55:08,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:08,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:08,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:55:08,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:08,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:55:08,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:55:08,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:08,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:08,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:08,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:08,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:55:08,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:08,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:08,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:08,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:08,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:08,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:55:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 08:55:08,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559190360] [2020-10-28 08:55:08,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:55:08,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:55:08,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755619644] [2020-10-28 08:55:08,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:55:08,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:08,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:55:08,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:55:08,180 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 4 states. [2020-10-28 08:55:08,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:08,381 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2020-10-28 08:55:08,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:55:08,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-28 08:55:08,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:08,383 INFO L225 Difference]: With dead ends: 96 [2020-10-28 08:55:08,383 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 08:55:08,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:55:08,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 08:55:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-28 08:55:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 08:55:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-28 08:55:08,392 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 45 [2020-10-28 08:55:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:08,393 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-28 08:55:08,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:55:08,393 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-28 08:55:08,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 08:55:08,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:08,394 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:08,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:55:08,395 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:08,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:08,396 INFO L82 PathProgramCache]: Analyzing trace with hash 2065008412, now seen corresponding path program 1 times [2020-10-28 08:55:08,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:08,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767491649] [2020-10-28 08:55:08,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:08,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:09,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:13,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 08:55:13,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:13,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 08:55:13,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:13,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:13,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:55:13,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:55:13,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:55:13,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:13,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:13,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:13,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:13,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:13,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:13,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:13,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:13,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:13,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:13,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:13,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 08:55:13,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767491649] [2020-10-28 08:55:13,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:13,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:55:13,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652685890] [2020-10-28 08:55:13,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:55:13,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:13,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:55:13,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:13,517 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 6 states. [2020-10-28 08:55:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:13,808 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2020-10-28 08:55:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:55:13,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-28 08:55:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:13,810 INFO L225 Difference]: With dead ends: 104 [2020-10-28 08:55:13,811 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 08:55:13,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 08:55:13,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2020-10-28 08:55:13,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 08:55:13,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-10-28 08:55:13,820 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 47 [2020-10-28 08:55:13,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:13,821 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-10-28 08:55:13,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:55:13,821 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-10-28 08:55:13,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 08:55:13,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:13,822 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 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 08:55:13,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:55:13,823 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:13,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:13,823 INFO L82 PathProgramCache]: Analyzing trace with hash -741238350, now seen corresponding path program 2 times [2020-10-28 08:55:13,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:13,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753704988] [2020-10-28 08:55:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:13,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:14,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:16,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:18,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 08:55:18,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:18,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 08:55:18,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:18,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:55:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:55:18,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:18,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:18,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:18,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:18,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:18,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:55:18,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:18,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:18,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:18,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:18,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:18,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-28 08:55:18,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753704988] [2020-10-28 08:55:18,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:18,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:55:18,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087225589] [2020-10-28 08:55:18,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:55:18,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:18,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:55:18,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:18,973 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 5 states. [2020-10-28 08:55:19,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:19,137 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2020-10-28 08:55:19,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:55:19,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-10-28 08:55:19,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:19,140 INFO L225 Difference]: With dead ends: 118 [2020-10-28 08:55:19,140 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 08:55:19,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:19,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 08:55:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-28 08:55:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 08:55:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-10-28 08:55:19,158 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 57 [2020-10-28 08:55:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:19,160 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-10-28 08:55:19,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:55:19,162 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-10-28 08:55:19,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 08:55:19,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:19,165 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 08:55:19,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:55:19,165 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:19,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:19,166 INFO L82 PathProgramCache]: Analyzing trace with hash 203130384, now seen corresponding path program 3 times [2020-10-28 08:55:19,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:19,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081524621] [2020-10-28 08:55:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:19,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:19,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:19,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:19,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:19,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:21,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:24,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:24,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 08:55:24,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:24,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:55:24,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:24,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:24,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:55:24,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:55:24,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:55:24,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:24,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:24,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:24,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:24,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:24,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:24,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:55:24,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:24,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:24,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:24,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:24,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:24,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-28 08:55:24,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081524621] [2020-10-28 08:55:24,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:24,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:55:24,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067062717] [2020-10-28 08:55:24,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:55:24,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:24,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:55:24,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:24,344 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 7 states. [2020-10-28 08:55:24,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:24,648 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2020-10-28 08:55:24,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:55:24,649 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-10-28 08:55:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:24,650 INFO L225 Difference]: With dead ends: 124 [2020-10-28 08:55:24,650 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 08:55:24,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 08:55:24,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2020-10-28 08:55:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 08:55:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-10-28 08:55:24,672 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 59 [2020-10-28 08:55:24,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:24,673 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-10-28 08:55:24,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:55:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-10-28 08:55:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 08:55:24,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:24,675 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 08:55:24,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:55:24,675 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:24,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:24,678 INFO L82 PathProgramCache]: Analyzing trace with hash -991479898, now seen corresponding path program 4 times [2020-10-28 08:55:24,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:24,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429202181] [2020-10-28 08:55:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:24,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:24,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:24,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:24,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:24,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:29,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:29,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 08:55:29,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:29,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 08:55:29,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:29,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:29,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:55:29,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:55:29,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:55:29,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:29,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:29,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:29,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:29,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:29,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:29,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:29,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:29,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:29,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:29,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:29,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:29,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-28 08:55:29,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429202181] [2020-10-28 08:55:29,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:29,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:55:29,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674191072] [2020-10-28 08:55:29,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:55:29,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:29,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:55:29,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:55:29,878 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 8 states. [2020-10-28 08:55:30,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:30,227 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2020-10-28 08:55:30,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:55:30,228 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-28 08:55:30,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:30,229 INFO L225 Difference]: With dead ends: 142 [2020-10-28 08:55:30,229 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 08:55:30,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:55:30,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 08:55:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2020-10-28 08:55:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 08:55:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-10-28 08:55:30,249 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 69 [2020-10-28 08:55:30,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:30,249 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-10-28 08:55:30,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:55:30,249 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-10-28 08:55:30,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:55:30,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:30,250 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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 08:55:30,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:55:30,251 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:30,251 INFO L82 PathProgramCache]: Analyzing trace with hash 323823036, now seen corresponding path program 5 times [2020-10-28 08:55:30,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:30,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635328192] [2020-10-28 08:55:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:30,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:30,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:30,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:30,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:30,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:35,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:35,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 08:55:35,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:35,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:55:35,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:35,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:35,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:55:35,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:35,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:55:35,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:35,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:35,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:35,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:35,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:35,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:35,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:35,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:35,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:35,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:35,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:35,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:35,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-28 08:55:35,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635328192] [2020-10-28 08:55:35,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:35,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:55:35,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34481128] [2020-10-28 08:55:35,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:55:35,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:35,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:55:35,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:35,372 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 6 states. [2020-10-28 08:55:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:35,522 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2020-10-28 08:55:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:55:35,523 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-28 08:55:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:35,524 INFO L225 Difference]: With dead ends: 160 [2020-10-28 08:55:35,524 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 08:55:35,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:35,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 08:55:35,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-28 08:55:35,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 08:55:35,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2020-10-28 08:55:35,532 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 79 [2020-10-28 08:55:35,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:35,532 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2020-10-28 08:55:35,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:55:35,532 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2020-10-28 08:55:35,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 08:55:35,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:35,534 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 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 08:55:35,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:55:35,534 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:35,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:35,534 INFO L82 PathProgramCache]: Analyzing trace with hash -162244710, now seen corresponding path program 6 times [2020-10-28 08:55:35,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:35,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363618621] [2020-10-28 08:55:35,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:35,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:35,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:35,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:35,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:35,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:40,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:40,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 08:55:40,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:40,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 08:55:40,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:40,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:40,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:55:40,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 08:55:40,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:55:40,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:40,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:40,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:40,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:40,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:40,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:40,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:40,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:40,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:40,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:40,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:40,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:40,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-10-28 08:55:40,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363618621] [2020-10-28 08:55:40,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:40,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:55:40,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030095777] [2020-10-28 08:55:40,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:55:40,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:40,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:55:40,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:55:40,680 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand 9 states. [2020-10-28 08:55:40,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:40,958 INFO L93 Difference]: Finished difference Result 162 states and 177 transitions. [2020-10-28 08:55:40,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:55:40,959 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 81 [2020-10-28 08:55:40,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:40,960 INFO L225 Difference]: With dead ends: 162 [2020-10-28 08:55:40,960 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 08:55:40,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:55:40,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 08:55:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2020-10-28 08:55:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 08:55:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2020-10-28 08:55:40,968 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 81 [2020-10-28 08:55:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:40,968 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2020-10-28 08:55:40,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:55:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2020-10-28 08:55:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 08:55:40,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:40,970 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 1, 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 08:55:40,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:55:40,970 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:40,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:40,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1856283824, now seen corresponding path program 7 times [2020-10-28 08:55:40,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:40,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561054807] [2020-10-28 08:55:40,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:41,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:41,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:41,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:41,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:43,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:46,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:46,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 08:55:46,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:46,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 08:55:46,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:46,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:46,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:55:46,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-28 08:55:46,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:55:46,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:46,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:46,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:46,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:46,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:46,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:46,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:46,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:46,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:46,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:46,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:46,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:46,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-28 08:55:46,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561054807] [2020-10-28 08:55:46,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:46,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:55:46,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460649249] [2020-10-28 08:55:46,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:55:46,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:55:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:55:46,381 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand 10 states. [2020-10-28 08:55:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:46,766 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2020-10-28 08:55:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:55:46,767 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 91 [2020-10-28 08:55:46,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:46,768 INFO L225 Difference]: With dead ends: 180 [2020-10-28 08:55:46,768 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 08:55:46,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:55:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 08:55:46,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2020-10-28 08:55:46,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 08:55:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2020-10-28 08:55:46,782 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 91 [2020-10-28 08:55:46,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:46,783 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2020-10-28 08:55:46,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:55:46,783 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2020-10-28 08:55:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 08:55:46,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:46,785 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 1, 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 08:55:46,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:55:46,785 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:46,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:46,786 INFO L82 PathProgramCache]: Analyzing trace with hash -776810938, now seen corresponding path program 8 times [2020-10-28 08:55:46,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:46,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898504146] [2020-10-28 08:55:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:46,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:46,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:46,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:46,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:47,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:51,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:51,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 08:55:51,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:51,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 08:55:51,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:51,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:55:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:55:51,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:51,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:51,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:51,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:51,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:51,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:51,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:51,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:51,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:51,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-10-28 08:55:51,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898504146] [2020-10-28 08:55:51,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:51,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:55:51,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881712981] [2020-10-28 08:55:51,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:55:51,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:51,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:55:51,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:51,936 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 7 states. [2020-10-28 08:55:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:52,082 INFO L93 Difference]: Finished difference Result 202 states and 214 transitions. [2020-10-28 08:55:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:55:52,082 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2020-10-28 08:55:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:52,083 INFO L225 Difference]: With dead ends: 202 [2020-10-28 08:55:52,083 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 08:55:52,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:52,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 08:55:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-28 08:55:52,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 08:55:52,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2020-10-28 08:55:52,094 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 101 [2020-10-28 08:55:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:52,095 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2020-10-28 08:55:52,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:55:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2020-10-28 08:55:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 08:55:52,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:52,096 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 1, 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 08:55:52,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:55:52,097 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:52,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:52,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2060592548, now seen corresponding path program 9 times [2020-10-28 08:55:52,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:52,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380316906] [2020-10-28 08:55:52,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:52,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:52,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:52,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:52,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:56,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:57,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:57,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 08:55:57,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:57,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 08:55:57,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:57,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:57,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:55:57,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 08:55:57,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:55:57,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:57,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:57,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:57,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:57,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:57,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:57,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:57,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:57,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:57,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-10-28 08:55:57,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380316906] [2020-10-28 08:55:57,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:57,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:55:57,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076685216] [2020-10-28 08:55:57,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:55:57,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:57,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:55:57,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:55:57,317 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand 11 states. [2020-10-28 08:55:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:57,652 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2020-10-28 08:55:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:55:57,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 103 [2020-10-28 08:55:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:57,653 INFO L225 Difference]: With dead ends: 200 [2020-10-28 08:55:57,653 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 08:55:57,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:55:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 08:55:57,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2020-10-28 08:55:57,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 08:55:57,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2020-10-28 08:55:57,660 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 103 [2020-10-28 08:55:57,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:57,663 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2020-10-28 08:55:57,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:55:57,663 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2020-10-28 08:55:57,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 08:55:57,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:57,666 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 1, 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 08:55:57,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:55:57,666 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:57,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:57,667 INFO L82 PathProgramCache]: Analyzing trace with hash -619352518, now seen corresponding path program 10 times [2020-10-28 08:55:57,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:57,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413538309] [2020-10-28 08:55:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:57,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:57,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:57,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:57,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:02,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:02,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 08:56:02,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:02,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 08:56:02,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:02,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:02,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:56:02,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:02,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:56:02,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:02,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:02,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:02,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:02,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:02,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:02,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:02,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:02,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:02,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:02,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:02,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:02,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2020-10-28 08:56:02,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413538309] [2020-10-28 08:56:02,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:02,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:56:02,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477606676] [2020-10-28 08:56:02,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:56:02,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:02,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:56:02,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:56:02,832 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand 8 states. [2020-10-28 08:56:02,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:02,992 INFO L93 Difference]: Finished difference Result 224 states and 236 transitions. [2020-10-28 08:56:02,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:56:02,993 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 113 [2020-10-28 08:56:02,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:02,994 INFO L225 Difference]: With dead ends: 224 [2020-10-28 08:56:02,994 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 08:56:02,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:56:02,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 08:56:03,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-28 08:56:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 08:56:03,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2020-10-28 08:56:03,002 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 113 [2020-10-28 08:56:03,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:03,002 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2020-10-28 08:56:03,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:56:03,002 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2020-10-28 08:56:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 08:56:03,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:03,004 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 1, 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 08:56:03,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:56:03,004 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:03,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:03,005 INFO L82 PathProgramCache]: Analyzing trace with hash -385439592, now seen corresponding path program 11 times [2020-10-28 08:56:03,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:03,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599974099] [2020-10-28 08:56:03,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:03,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:03,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:03,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:03,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:08,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:08,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 08:56:08,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:08,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 08:56:08,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:08,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:08,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:56:08,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:56:08,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:56:08,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:08,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:08,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:08,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:08,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:08,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:08,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:08,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:08,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:08,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:08,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:08,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:08,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2020-10-28 08:56:08,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599974099] [2020-10-28 08:56:08,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:08,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:56:08,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438083769] [2020-10-28 08:56:08,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:56:08,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:08,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:56:08,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:56:08,229 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand 12 states. [2020-10-28 08:56:08,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:08,666 INFO L93 Difference]: Finished difference Result 220 states and 235 transitions. [2020-10-28 08:56:08,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:56:08,666 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 115 [2020-10-28 08:56:08,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:08,668 INFO L225 Difference]: With dead ends: 220 [2020-10-28 08:56:08,668 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 08:56:08,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:56:08,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 08:56:08,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2020-10-28 08:56:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 08:56:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 136 transitions. [2020-10-28 08:56:08,678 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 136 transitions. Word has length 115 [2020-10-28 08:56:08,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:08,679 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 136 transitions. [2020-10-28 08:56:08,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:56:08,679 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 136 transitions. [2020-10-28 08:56:08,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 08:56:08,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:08,680 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 1, 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 08:56:08,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:56:08,681 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:08,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:08,681 INFO L82 PathProgramCache]: Analyzing trace with hash -705916882, now seen corresponding path program 12 times [2020-10-28 08:56:08,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:08,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675781351] [2020-10-28 08:56:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:08,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:08,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:08,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:08,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:13,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:13,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 08:56:13,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:13,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 08:56:13,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:13,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:13,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:56:13,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 08:56:13,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:56:13,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:13,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:13,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:13,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:13,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:13,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:13,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:13,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:13,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:13,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:13,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:13,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:13,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2020-10-28 08:56:13,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675781351] [2020-10-28 08:56:13,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:13,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:56:13,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233782911] [2020-10-28 08:56:13,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:56:13,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:13,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:56:13,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:56:13,906 INFO L87 Difference]: Start difference. First operand 130 states and 136 transitions. Second operand 13 states. [2020-10-28 08:56:14,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:14,276 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2020-10-28 08:56:14,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:56:14,277 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 125 [2020-10-28 08:56:14,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:14,278 INFO L225 Difference]: With dead ends: 238 [2020-10-28 08:56:14,279 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 08:56:14,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:56:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 08:56:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2020-10-28 08:56:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-28 08:56:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 146 transitions. [2020-10-28 08:56:14,288 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 146 transitions. Word has length 125 [2020-10-28 08:56:14,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:14,288 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 146 transitions. [2020-10-28 08:56:14,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:56:14,288 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 146 transitions. [2020-10-28 08:56:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-28 08:56:14,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:14,290 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 1, 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 08:56:14,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:56:14,290 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:14,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1703490628, now seen corresponding path program 13 times [2020-10-28 08:56:14,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:14,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590395322] [2020-10-28 08:56:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:14,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:14,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:14,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:14,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:19,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:19,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 08:56:19,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:19,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-28 08:56:19,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:19,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:19,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:56:19,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:19,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:56:19,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:19,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:19,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:19,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:19,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:19,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:19,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:19,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:19,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:19,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:19,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:19,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:19,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2020-10-28 08:56:19,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590395322] [2020-10-28 08:56:19,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:19,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:56:19,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714001533] [2020-10-28 08:56:19,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:56:19,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:19,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:56:19,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:56:19,501 INFO L87 Difference]: Start difference. First operand 140 states and 146 transitions. Second operand 9 states. [2020-10-28 08:56:19,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:19,623 INFO L93 Difference]: Finished difference Result 266 states and 278 transitions. [2020-10-28 08:56:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:56:19,624 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-10-28 08:56:19,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:19,625 INFO L225 Difference]: With dead ends: 266 [2020-10-28 08:56:19,625 INFO L226 Difference]: Without dead ends: 143 [2020-10-28 08:56:19,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:56:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-28 08:56:19,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-28 08:56:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 08:56:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 148 transitions. [2020-10-28 08:56:19,634 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 148 transitions. Word has length 135 [2020-10-28 08:56:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:19,634 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 148 transitions. [2020-10-28 08:56:19,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:56:19,634 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 148 transitions. [2020-10-28 08:56:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 08:56:19,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:19,636 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 1, 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 08:56:19,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:56:19,636 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:19,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1940468770, now seen corresponding path program 14 times [2020-10-28 08:56:19,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:19,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758333154] [2020-10-28 08:56:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:19,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:19,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:19,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:19,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:24,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:24,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-28 08:56:24,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:24,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-28 08:56:24,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:24,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:24,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:56:24,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:56:24,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:56:24,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:24,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:24,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:24,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:24,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:24,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:24,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:24,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:24,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:24,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:24,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:24,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:24,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2020-10-28 08:56:24,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758333154] [2020-10-28 08:56:24,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:24,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:56:24,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967696003] [2020-10-28 08:56:24,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:56:24,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:24,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:56:24,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:56:24,945 INFO L87 Difference]: Start difference. First operand 142 states and 148 transitions. Second operand 14 states. [2020-10-28 08:56:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:25,393 INFO L93 Difference]: Finished difference Result 258 states and 273 transitions. [2020-10-28 08:56:25,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:56:25,394 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 137 [2020-10-28 08:56:25,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:25,395 INFO L225 Difference]: With dead ends: 258 [2020-10-28 08:56:25,395 INFO L226 Difference]: Without dead ends: 157 [2020-10-28 08:56:25,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:56:25,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-28 08:56:25,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 152. [2020-10-28 08:56:25,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-28 08:56:25,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 158 transitions. [2020-10-28 08:56:25,405 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 158 transitions. Word has length 137 [2020-10-28 08:56:25,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:25,406 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 158 transitions. [2020-10-28 08:56:25,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:56:25,406 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 158 transitions. [2020-10-28 08:56:25,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-28 08:56:25,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:25,411 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 1, 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 08:56:25,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:56:25,412 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:25,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:25,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1333577928, now seen corresponding path program 15 times [2020-10-28 08:56:25,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:25,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642190871] [2020-10-28 08:56:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:25,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:25,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:25,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:25,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:30,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:30,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-28 08:56:30,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:30,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-28 08:56:30,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:30,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:30,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:56:30,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:30,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:56:30,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:30,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:30,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:30,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:30,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:30,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:30,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:30,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:30,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:30,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:30,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:30,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:30,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-10-28 08:56:30,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642190871] [2020-10-28 08:56:30,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:30,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:56:30,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316298032] [2020-10-28 08:56:30,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:56:30,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:30,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:56:30,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:30,646 INFO L87 Difference]: Start difference. First operand 152 states and 158 transitions. Second operand 10 states. [2020-10-28 08:56:30,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:30,808 INFO L93 Difference]: Finished difference Result 288 states and 300 transitions. [2020-10-28 08:56:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:56:30,809 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 147 [2020-10-28 08:56:30,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:30,810 INFO L225 Difference]: With dead ends: 288 [2020-10-28 08:56:30,810 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 08:56:30,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:30,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 08:56:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-10-28 08:56:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 08:56:30,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2020-10-28 08:56:30,819 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 147 [2020-10-28 08:56:30,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:30,819 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2020-10-28 08:56:30,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:56:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2020-10-28 08:56:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 08:56:30,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:30,821 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 7, 1, 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 08:56:30,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:56:30,821 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:30,822 INFO L82 PathProgramCache]: Analyzing trace with hash -516138474, now seen corresponding path program 16 times [2020-10-28 08:56:30,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:30,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100712685] [2020-10-28 08:56:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:30,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:30,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:30,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:30,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:35,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:35,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 08:56:35,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:35,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 08:56:35,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:35,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:35,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:56:35,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 08:56:35,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:56:35,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:36,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:36,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:36,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:36,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:36,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:36,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:36,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:36,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:36,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:36,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:36,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:36,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-10-28 08:56:36,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100712685] [2020-10-28 08:56:36,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:36,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:56:36,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127994701] [2020-10-28 08:56:36,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:56:36,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:36,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:56:36,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:56:36,094 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand 15 states. [2020-10-28 08:56:36,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:36,585 INFO L93 Difference]: Finished difference Result 278 states and 293 transitions. [2020-10-28 08:56:36,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:56:36,585 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 149 [2020-10-28 08:56:36,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:36,587 INFO L225 Difference]: With dead ends: 278 [2020-10-28 08:56:36,587 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 08:56:36,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:56:36,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 08:56:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2020-10-28 08:56:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-28 08:56:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 170 transitions. [2020-10-28 08:56:36,597 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 170 transitions. Word has length 149 [2020-10-28 08:56:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:36,597 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 170 transitions. [2020-10-28 08:56:36,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:56:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 170 transitions. [2020-10-28 08:56:36,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-28 08:56:36,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:36,599 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 7, 7, 1, 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 08:56:36,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:56:36,600 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:36,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:36,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1486799828, now seen corresponding path program 17 times [2020-10-28 08:56:36,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:36,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611781507] [2020-10-28 08:56:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:36,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:36,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:36,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:36,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:41,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:41,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-28 08:56:41,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:41,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:56:41,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:41,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:41,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:56:41,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 08:56:41,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:56:41,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:41,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:41,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:41,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:41,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:41,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:41,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:41,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:41,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:41,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:41,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:41,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:41,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-28 08:56:41,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611781507] [2020-10-28 08:56:41,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:41,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:56:41,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085796870] [2020-10-28 08:56:41,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:56:41,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:41,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:56:41,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:56:41,888 INFO L87 Difference]: Start difference. First operand 164 states and 170 transitions. Second operand 16 states. [2020-10-28 08:56:42,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:42,362 INFO L93 Difference]: Finished difference Result 296 states and 311 transitions. [2020-10-28 08:56:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:56:42,363 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2020-10-28 08:56:42,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:42,365 INFO L225 Difference]: With dead ends: 296 [2020-10-28 08:56:42,365 INFO L226 Difference]: Without dead ends: 179 [2020-10-28 08:56:42,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:56:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-28 08:56:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 174. [2020-10-28 08:56:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 08:56:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 180 transitions. [2020-10-28 08:56:42,375 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 180 transitions. Word has length 159 [2020-10-28 08:56:42,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:42,376 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 180 transitions. [2020-10-28 08:56:42,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:56:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 180 transitions. [2020-10-28 08:56:42,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-28 08:56:42,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:42,378 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 7, 7, 1, 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 08:56:42,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:56:42,378 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:42,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:42,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1979860286, now seen corresponding path program 18 times [2020-10-28 08:56:42,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:42,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970454144] [2020-10-28 08:56:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:42,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:42,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:42,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:42,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:47,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:47,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-28 08:56:47,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:47,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 08:56:47,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:47,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:47,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:56:47,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:47,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:56:47,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:47,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:47,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:47,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:47,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:47,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:47,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:56:47,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:47,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:47,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:47,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:47,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:47,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:56:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2020-10-28 08:56:47,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970454144] [2020-10-28 08:56:47,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:47,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:56:47,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536739588] [2020-10-28 08:56:47,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:56:47,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:47,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:56:47,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:56:47,609 INFO L87 Difference]: Start difference. First operand 174 states and 180 transitions. Second operand 11 states. [2020-10-28 08:56:47,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:47,772 INFO L93 Difference]: Finished difference Result 330 states and 342 transitions. [2020-10-28 08:56:47,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:56:47,775 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 169 [2020-10-28 08:56:47,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:47,777 INFO L225 Difference]: With dead ends: 330 [2020-10-28 08:56:47,777 INFO L226 Difference]: Without dead ends: 177 [2020-10-28 08:56:47,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:56:47,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-28 08:56:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2020-10-28 08:56:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-28 08:56:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 182 transitions. [2020-10-28 08:56:47,791 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 182 transitions. Word has length 169 [2020-10-28 08:56:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:47,792 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 182 transitions. [2020-10-28 08:56:47,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:56:47,792 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 182 transitions. [2020-10-28 08:56:47,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-28 08:56:47,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:47,795 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 8, 8, 1, 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 08:56:47,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:56:47,795 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:47,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:47,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1733575456, now seen corresponding path program 19 times [2020-10-28 08:56:47,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:47,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245391187] [2020-10-28 08:56:47,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:47,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:47,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:47,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:48,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:52,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:52,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-28 08:56:52,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:52,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-28 08:56:52,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:52,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:52,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:56:52,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 08:56:52,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:56:52,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:53,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:53,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:53,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:53,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:53,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:53,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:56:53,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:53,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:53,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:53,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:53,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:53,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 740 trivial. 0 not checked. [2020-10-28 08:56:53,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245391187] [2020-10-28 08:56:53,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:53,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:56:53,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976926593] [2020-10-28 08:56:53,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:56:53,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:53,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:56:53,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:56:53,231 INFO L87 Difference]: Start difference. First operand 176 states and 182 transitions. Second operand 17 states. [2020-10-28 08:56:53,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:53,800 INFO L93 Difference]: Finished difference Result 316 states and 331 transitions. [2020-10-28 08:56:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:56:53,801 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2020-10-28 08:56:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:53,802 INFO L225 Difference]: With dead ends: 316 [2020-10-28 08:56:53,802 INFO L226 Difference]: Without dead ends: 191 [2020-10-28 08:56:53,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:56:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-28 08:56:53,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 186. [2020-10-28 08:56:53,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 08:56:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 192 transitions. [2020-10-28 08:56:53,812 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 192 transitions. Word has length 171 [2020-10-28 08:56:53,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:53,813 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 192 transitions. [2020-10-28 08:56:53,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:56:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 192 transitions. [2020-10-28 08:56:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-28 08:56:53,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:53,814 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 1, 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 08:56:53,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:56:53,815 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:53,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:53,815 INFO L82 PathProgramCache]: Analyzing trace with hash -316251978, now seen corresponding path program 20 times [2020-10-28 08:56:53,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:53,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797136120] [2020-10-28 08:56:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:53,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:53,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:54,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:54,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:58,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:58,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-28 08:56:58,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:58,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-28 08:56:58,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:58,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:58,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:56:58,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 08:56:58,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:56:58,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:59,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:59,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:59,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:59,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:59,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:59,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:59,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:59,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:59,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:59,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:59,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:59,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2020-10-28 08:56:59,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797136120] [2020-10-28 08:56:59,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:59,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:56:59,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106589991] [2020-10-28 08:56:59,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:56:59,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:59,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:56:59,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:56:59,227 INFO L87 Difference]: Start difference. First operand 186 states and 192 transitions. Second operand 18 states. [2020-10-28 08:56:59,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:59,801 INFO L93 Difference]: Finished difference Result 334 states and 349 transitions. [2020-10-28 08:56:59,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:56:59,802 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 181 [2020-10-28 08:56:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:59,804 INFO L225 Difference]: With dead ends: 334 [2020-10-28 08:56:59,804 INFO L226 Difference]: Without dead ends: 201 [2020-10-28 08:56:59,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:56:59,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-28 08:56:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 196. [2020-10-28 08:56:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-28 08:56:59,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 202 transitions. [2020-10-28 08:56:59,814 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 202 transitions. Word has length 181 [2020-10-28 08:56:59,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:59,814 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 202 transitions. [2020-10-28 08:56:59,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:56:59,815 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 202 transitions. [2020-10-28 08:56:59,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-28 08:56:59,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:59,816 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 8, 8, 1, 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 08:56:59,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:56:59,816 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:59,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1572095284, now seen corresponding path program 21 times [2020-10-28 08:56:59,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:59,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237756793] [2020-10-28 08:56:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:59,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:59,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:59,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:59,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:05,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:05,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 08:57:05,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:05,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5153 [2020-10-28 08:57:05,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:05,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:05,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:57:05,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:05,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:57:05,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:05,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:05,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:05,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:05,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:05,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:05,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:05,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:05,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:05,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:05,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:05,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:05,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2020-10-28 08:57:05,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237756793] [2020-10-28 08:57:05,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:05,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:57:05,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201596013] [2020-10-28 08:57:05,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:57:05,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:05,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:57:05,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:57:05,161 INFO L87 Difference]: Start difference. First operand 196 states and 202 transitions. Second operand 12 states. [2020-10-28 08:57:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:05,322 INFO L93 Difference]: Finished difference Result 372 states and 384 transitions. [2020-10-28 08:57:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:57:05,323 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 191 [2020-10-28 08:57:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:05,325 INFO L225 Difference]: With dead ends: 372 [2020-10-28 08:57:05,325 INFO L226 Difference]: Without dead ends: 199 [2020-10-28 08:57:05,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:57:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-28 08:57:05,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2020-10-28 08:57:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-28 08:57:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 204 transitions. [2020-10-28 08:57:05,335 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 204 transitions. Word has length 191 [2020-10-28 08:57:05,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:05,335 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 204 transitions. [2020-10-28 08:57:05,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:57:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 204 transitions. [2020-10-28 08:57:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-28 08:57:05,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:05,337 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 9, 1, 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 08:57:05,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:57:05,337 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:05,337 INFO L82 PathProgramCache]: Analyzing trace with hash -759002966, now seen corresponding path program 22 times [2020-10-28 08:57:05,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:05,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274576504] [2020-10-28 08:57:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:05,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:05,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:05,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:05,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:10,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:10,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-28 08:57:10,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:10,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5219 [2020-10-28 08:57:10,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:10,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:57:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 08:57:10,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:57:10,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:10,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:10,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:10,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:10,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:10,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:10,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:10,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:10,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:10,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:10,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:10,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:10,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2020-10-28 08:57:10,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274576504] [2020-10-28 08:57:10,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:10,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:57:10,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883778149] [2020-10-28 08:57:10,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:57:10,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:10,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:57:10,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:57:10,914 INFO L87 Difference]: Start difference. First operand 198 states and 204 transitions. Second operand 19 states. [2020-10-28 08:57:11,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:11,503 INFO L93 Difference]: Finished difference Result 354 states and 369 transitions. [2020-10-28 08:57:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:57:11,503 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 193 [2020-10-28 08:57:11,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:11,505 INFO L225 Difference]: With dead ends: 354 [2020-10-28 08:57:11,505 INFO L226 Difference]: Without dead ends: 213 [2020-10-28 08:57:11,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:57:11,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-28 08:57:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2020-10-28 08:57:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-28 08:57:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 214 transitions. [2020-10-28 08:57:11,516 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 214 transitions. Word has length 193 [2020-10-28 08:57:11,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:11,516 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 214 transitions. [2020-10-28 08:57:11,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:57:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 214 transitions. [2020-10-28 08:57:11,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-28 08:57:11,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:11,518 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 1, 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 08:57:11,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:57:11,518 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:11,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:11,519 INFO L82 PathProgramCache]: Analyzing trace with hash -495435328, now seen corresponding path program 23 times [2020-10-28 08:57:11,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:11,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154827189] [2020-10-28 08:57:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:11,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:11,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:11,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:11,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:16,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:16,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-28 08:57:16,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:16,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5191 [2020-10-28 08:57:16,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:16,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:16,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:57:16,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:16,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:57:16,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:16,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:16,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:16,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:16,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:16,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:16,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:16,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:16,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:16,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1280 trivial. 0 not checked. [2020-10-28 08:57:16,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154827189] [2020-10-28 08:57:16,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:16,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:57:16,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241883742] [2020-10-28 08:57:16,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:57:16,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:16,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:57:16,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:57:16,913 INFO L87 Difference]: Start difference. First operand 208 states and 214 transitions. Second operand 13 states. [2020-10-28 08:57:17,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:17,107 INFO L93 Difference]: Finished difference Result 394 states and 406 transitions. [2020-10-28 08:57:17,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:57:17,108 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 203 [2020-10-28 08:57:17,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:17,110 INFO L225 Difference]: With dead ends: 394 [2020-10-28 08:57:17,110 INFO L226 Difference]: Without dead ends: 211 [2020-10-28 08:57:17,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:57:17,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-28 08:57:17,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2020-10-28 08:57:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-28 08:57:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 216 transitions. [2020-10-28 08:57:17,124 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 216 transitions. Word has length 203 [2020-10-28 08:57:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:17,125 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 216 transitions. [2020-10-28 08:57:17,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:57:17,125 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 216 transitions. [2020-10-28 08:57:17,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-28 08:57:17,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:17,127 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 1, 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 08:57:17,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:57:17,127 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:17,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:17,128 INFO L82 PathProgramCache]: Analyzing trace with hash -742182242, now seen corresponding path program 24 times [2020-10-28 08:57:17,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:17,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938949421] [2020-10-28 08:57:17,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:17,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:17,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:17,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:17,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:22,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:22,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-28 08:57:22,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:22,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5187 [2020-10-28 08:57:22,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:22,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:22,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:57:22,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-28 08:57:22,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:57:22,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:22,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:22,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:22,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:22,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:22,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:22,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:22,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:22,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:22,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:22,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:22,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:22,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1124 trivial. 0 not checked. [2020-10-28 08:57:22,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938949421] [2020-10-28 08:57:22,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:22,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:57:22,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664167440] [2020-10-28 08:57:22,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:57:22,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:22,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:57:22,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:57:22,695 INFO L87 Difference]: Start difference. First operand 210 states and 216 transitions. Second operand 20 states. [2020-10-28 08:57:23,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:23,341 INFO L93 Difference]: Finished difference Result 374 states and 389 transitions. [2020-10-28 08:57:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:57:23,343 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 205 [2020-10-28 08:57:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:23,345 INFO L225 Difference]: With dead ends: 374 [2020-10-28 08:57:23,345 INFO L226 Difference]: Without dead ends: 225 [2020-10-28 08:57:23,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:57:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-28 08:57:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 220. [2020-10-28 08:57:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-28 08:57:23,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 226 transitions. [2020-10-28 08:57:23,355 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 226 transitions. Word has length 205 [2020-10-28 08:57:23,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:23,356 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 226 transitions. [2020-10-28 08:57:23,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:57:23,356 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 226 transitions. [2020-10-28 08:57:23,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-28 08:57:23,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:23,357 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 1, 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 08:57:23,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:57:23,358 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:23,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:23,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1184287412, now seen corresponding path program 25 times [2020-10-28 08:57:23,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:23,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630531392] [2020-10-28 08:57:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:23,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:23,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:23,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:23,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:28,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:28,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-28 08:57:28,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:28,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5220 [2020-10-28 08:57:28,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:28,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:28,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:57:28,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:57:28,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:57:28,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:28,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:28,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:28,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:28,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:28,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:28,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:28,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:28,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:28,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:28,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:28,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:28,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1256 trivial. 0 not checked. [2020-10-28 08:57:28,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630531392] [2020-10-28 08:57:28,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:28,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:57:28,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966661326] [2020-10-28 08:57:28,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:57:28,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:28,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:57:28,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:57:28,996 INFO L87 Difference]: Start difference. First operand 220 states and 226 transitions. Second operand 21 states. [2020-10-28 08:57:29,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:29,624 INFO L93 Difference]: Finished difference Result 392 states and 407 transitions. [2020-10-28 08:57:29,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:57:29,624 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 215 [2020-10-28 08:57:29,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:29,626 INFO L225 Difference]: With dead ends: 392 [2020-10-28 08:57:29,626 INFO L226 Difference]: Without dead ends: 235 [2020-10-28 08:57:29,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:57:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-28 08:57:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 230. [2020-10-28 08:57:29,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-28 08:57:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 236 transitions. [2020-10-28 08:57:29,635 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 236 transitions. Word has length 215 [2020-10-28 08:57:29,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:29,636 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 236 transitions. [2020-10-28 08:57:29,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:57:29,636 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 236 transitions. [2020-10-28 08:57:29,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-28 08:57:29,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:29,638 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 10, 10, 1, 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 08:57:29,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:57:29,638 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:29,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:29,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1017217206, now seen corresponding path program 26 times [2020-10-28 08:57:29,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:29,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363627106] [2020-10-28 08:57:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:29,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:29,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:29,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:29,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:34,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:34,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-28 08:57:34,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:34,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-28 08:57:34,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:34,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:34,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:57:34,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:34,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:57:34,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:34,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:34,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:34,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:34,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:34,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:34,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:34,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:34,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:34,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:34,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:34,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:34,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1620 trivial. 0 not checked. [2020-10-28 08:57:34,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363627106] [2020-10-28 08:57:34,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:34,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:57:34,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631124444] [2020-10-28 08:57:34,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:57:34,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:34,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:57:34,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:57:34,958 INFO L87 Difference]: Start difference. First operand 230 states and 236 transitions. Second operand 14 states. [2020-10-28 08:57:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:35,168 INFO L93 Difference]: Finished difference Result 436 states and 448 transitions. [2020-10-28 08:57:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:57:35,169 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 225 [2020-10-28 08:57:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:35,171 INFO L225 Difference]: With dead ends: 436 [2020-10-28 08:57:35,171 INFO L226 Difference]: Without dead ends: 233 [2020-10-28 08:57:35,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:57:35,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-28 08:57:35,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-10-28 08:57:35,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-28 08:57:35,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 238 transitions. [2020-10-28 08:57:35,185 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 238 transitions. Word has length 225 [2020-10-28 08:57:35,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:35,185 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 238 transitions. [2020-10-28 08:57:35,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:57:35,186 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 238 transitions. [2020-10-28 08:57:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-28 08:57:35,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:35,187 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 11, 11, 1, 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 08:57:35,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:57:35,188 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:35,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:35,188 INFO L82 PathProgramCache]: Analyzing trace with hash 400053672, now seen corresponding path program 27 times [2020-10-28 08:57:35,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:35,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955955519] [2020-10-28 08:57:35,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:35,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:40,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:40,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-28 08:57:40,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:40,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-28 08:57:40,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:40,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:40,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:57:40,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 08:57:40,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:57:40,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:40,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:40,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:40,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:40,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:40,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:40,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:57:40,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:40,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:40,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:40,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:40,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:40,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:57:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1417 trivial. 0 not checked. [2020-10-28 08:57:40,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955955519] [2020-10-28 08:57:40,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:40,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:57:40,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225050554] [2020-10-28 08:57:40,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:57:40,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:40,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:57:40,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:57:40,858 INFO L87 Difference]: Start difference. First operand 232 states and 238 transitions. Second operand 22 states. [2020-10-28 08:57:41,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:41,430 INFO L93 Difference]: Finished difference Result 412 states and 427 transitions. [2020-10-28 08:57:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:57:41,432 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 227 [2020-10-28 08:57:41,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:41,434 INFO L225 Difference]: With dead ends: 412 [2020-10-28 08:57:41,434 INFO L226 Difference]: Without dead ends: 247 [2020-10-28 08:57:41,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:57:41,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-28 08:57:41,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 242. [2020-10-28 08:57:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-28 08:57:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 248 transitions. [2020-10-28 08:57:41,455 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 248 transitions. Word has length 227 [2020-10-28 08:57:41,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:41,455 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 248 transitions. [2020-10-28 08:57:41,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:57:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 248 transitions. [2020-10-28 08:57:41,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-28 08:57:41,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:41,461 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 11, 11, 1, 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 08:57:41,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:57:41,462 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:41,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:41,467 INFO L82 PathProgramCache]: Analyzing trace with hash -127358658, now seen corresponding path program 28 times [2020-10-28 08:57:41,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:41,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100457274] [2020-10-28 08:57:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:41,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:41,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:41,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:41,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:46,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:46,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-28 08:57:46,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:46,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5166 [2020-10-28 08:57:46,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:46,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:46,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:57:46,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:46,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:57:46,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:46,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:46,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:46,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:46,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:46,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:46,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:46,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:46,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:46,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:46,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:46,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:46,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2020-10-28 08:57:46,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100457274] [2020-10-28 08:57:46,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:46,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:57:46,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925355166] [2020-10-28 08:57:46,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:57:46,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:46,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:57:46,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:57:46,919 INFO L87 Difference]: Start difference. First operand 242 states and 248 transitions. Second operand 15 states. [2020-10-28 08:57:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:47,081 INFO L93 Difference]: Finished difference Result 458 states and 470 transitions. [2020-10-28 08:57:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:57:47,081 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 237 [2020-10-28 08:57:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:47,084 INFO L225 Difference]: With dead ends: 458 [2020-10-28 08:57:47,084 INFO L226 Difference]: Without dead ends: 245 [2020-10-28 08:57:47,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:57:47,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-28 08:57:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2020-10-28 08:57:47,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-28 08:57:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 250 transitions. [2020-10-28 08:57:47,095 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 250 transitions. Word has length 237 [2020-10-28 08:57:47,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:47,095 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 250 transitions. [2020-10-28 08:57:47,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:57:47,096 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 250 transitions. [2020-10-28 08:57:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-28 08:57:47,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:47,098 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 12, 1, 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 08:57:47,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:57:47,098 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:47,098 INFO L82 PathProgramCache]: Analyzing trace with hash 2062410396, now seen corresponding path program 29 times [2020-10-28 08:57:47,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:47,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572073172] [2020-10-28 08:57:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:47,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:47,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:47,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:47,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:52,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:52,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-28 08:57:52,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:52,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 08:57:52,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:52,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:52,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:57:52,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:57:52,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:57:52,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:52,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:52,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:52,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:52,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:52,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:52,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:52,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:52,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:52,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:52,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:52,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:52,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1949 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1588 trivial. 0 not checked. [2020-10-28 08:57:52,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572073172] [2020-10-28 08:57:52,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:52,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:57:52,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441599096] [2020-10-28 08:57:52,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:57:52,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:52,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:57:52,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:57:52,604 INFO L87 Difference]: Start difference. First operand 244 states and 250 transitions. Second operand 23 states. [2020-10-28 08:57:53,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:53,321 INFO L93 Difference]: Finished difference Result 432 states and 447 transitions. [2020-10-28 08:57:53,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:57:53,322 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 239 [2020-10-28 08:57:53,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:53,324 INFO L225 Difference]: With dead ends: 432 [2020-10-28 08:57:53,324 INFO L226 Difference]: Without dead ends: 259 [2020-10-28 08:57:53,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:57:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-28 08:57:53,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 254. [2020-10-28 08:57:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-28 08:57:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 260 transitions. [2020-10-28 08:57:53,334 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 260 transitions. Word has length 239 [2020-10-28 08:57:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:53,335 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 260 transitions. [2020-10-28 08:57:53,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:57:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 260 transitions. [2020-10-28 08:57:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-28 08:57:53,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:53,337 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 12, 12, 1, 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 08:57:53,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:57:53,337 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:53,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:53,338 INFO L82 PathProgramCache]: Analyzing trace with hash -864791246, now seen corresponding path program 30 times [2020-10-28 08:57:53,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:53,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150084440] [2020-10-28 08:57:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:53,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:53,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:53,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:53,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:58,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:58,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-28 08:57:58,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:58,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5112 [2020-10-28 08:57:58,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:58,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:58,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:57:58,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-28 08:57:58,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:57:58,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:58,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:58,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:58,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:58,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:58,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:58,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:58,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:58,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:58,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:58,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:58,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:58,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2144 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2020-10-28 08:57:58,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150084440] [2020-10-28 08:57:58,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:58,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:57:58,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719677374] [2020-10-28 08:57:58,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:57:58,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:58,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:57:58,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:57:58,974 INFO L87 Difference]: Start difference. First operand 254 states and 260 transitions. Second operand 24 states. [2020-10-28 08:57:59,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:59,816 INFO L93 Difference]: Finished difference Result 450 states and 465 transitions. [2020-10-28 08:57:59,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:57:59,816 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 249 [2020-10-28 08:57:59,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:59,819 INFO L225 Difference]: With dead ends: 450 [2020-10-28 08:57:59,819 INFO L226 Difference]: Without dead ends: 269 [2020-10-28 08:57:59,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:57:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-28 08:57:59,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 264. [2020-10-28 08:57:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-28 08:57:59,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 270 transitions. [2020-10-28 08:57:59,830 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 270 transitions. Word has length 249 [2020-10-28 08:57:59,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:59,831 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 270 transitions. [2020-10-28 08:57:59,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:57:59,831 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 270 transitions. [2020-10-28 08:57:59,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-28 08:57:59,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:59,833 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 12, 12, 1, 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 08:57:59,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:57:59,833 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:59,834 INFO L82 PathProgramCache]: Analyzing trace with hash 441959496, now seen corresponding path program 31 times [2020-10-28 08:57:59,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:59,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614335743] [2020-10-28 08:57:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:59,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:59,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:00,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:00,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:05,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:05,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-28 08:58:05,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:05,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5212 [2020-10-28 08:58:05,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:05,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:05,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:58:05,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:05,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:58:05,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:05,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:05,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:05,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:05,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:05,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:05,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:05,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:05,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:05,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:05,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:05,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:05,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2349 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2020-10-28 08:58:05,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614335743] [2020-10-28 08:58:05,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:05,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:58:05,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030395424] [2020-10-28 08:58:05,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:58:05,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:05,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:58:05,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:58:05,351 INFO L87 Difference]: Start difference. First operand 264 states and 270 transitions. Second operand 16 states. [2020-10-28 08:58:05,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:05,565 INFO L93 Difference]: Finished difference Result 500 states and 512 transitions. [2020-10-28 08:58:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:58:05,565 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 259 [2020-10-28 08:58:05,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:05,567 INFO L225 Difference]: With dead ends: 500 [2020-10-28 08:58:05,567 INFO L226 Difference]: Without dead ends: 267 [2020-10-28 08:58:05,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:58:05,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-28 08:58:05,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2020-10-28 08:58:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-28 08:58:05,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 272 transitions. [2020-10-28 08:58:05,578 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 272 transitions. Word has length 259 [2020-10-28 08:58:05,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:05,578 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 272 transitions. [2020-10-28 08:58:05,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:58:05,578 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 272 transitions. [2020-10-28 08:58:05,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-28 08:58:05,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:05,580 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 13, 13, 1, 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 08:58:05,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:58:05,581 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:05,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:05,581 INFO L82 PathProgramCache]: Analyzing trace with hash 74613542, now seen corresponding path program 32 times [2020-10-28 08:58:05,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:05,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621464148] [2020-10-28 08:58:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:05,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:05,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:05,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:05,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:10,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:10,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-28 08:58:10,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:10,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5293 [2020-10-28 08:58:10,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:10,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:10,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 08:58:10,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 08:58:10,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:58:10,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:11,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:11,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:11,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:11,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:11,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:11,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:58:11,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:11,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:11,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:11,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:11,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:11,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1933 trivial. 0 not checked. [2020-10-28 08:58:11,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621464148] [2020-10-28 08:58:11,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:11,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:58:11,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87341133] [2020-10-28 08:58:11,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:58:11,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:11,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:58:11,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:58:11,440 INFO L87 Difference]: Start difference. First operand 266 states and 272 transitions. Second operand 25 states. [2020-10-28 08:58:12,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:12,154 INFO L93 Difference]: Finished difference Result 470 states and 485 transitions. [2020-10-28 08:58:12,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 08:58:12,155 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 261 [2020-10-28 08:58:12,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:12,157 INFO L225 Difference]: With dead ends: 470 [2020-10-28 08:58:12,157 INFO L226 Difference]: Without dead ends: 281 [2020-10-28 08:58:12,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:58:12,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-28 08:58:12,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 276. [2020-10-28 08:58:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-28 08:58:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 282 transitions. [2020-10-28 08:58:12,167 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 282 transitions. Word has length 261 [2020-10-28 08:58:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:12,168 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 282 transitions. [2020-10-28 08:58:12,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:58:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 282 transitions. [2020-10-28 08:58:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-28 08:58:12,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:12,170 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 13, 13, 1, 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 08:58:12,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:58:12,170 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:12,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1186541252, now seen corresponding path program 33 times [2020-10-28 08:58:12,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:12,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707760226] [2020-10-28 08:58:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:12,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:12,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:12,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:12,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:17,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:17,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-28 08:58:17,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:17,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5235 [2020-10-28 08:58:17,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:17,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:17,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:58:17,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 08:58:17,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 08:58:17,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:17,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:17,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:17,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:17,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:17,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:17,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:17,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:17,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:17,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:17,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:17,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:17,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2589 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2105 trivial. 0 not checked. [2020-10-28 08:58:18,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707760226] [2020-10-28 08:58:18,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:18,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:58:18,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106980603] [2020-10-28 08:58:18,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:58:18,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:18,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:58:18,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:58:18,010 INFO L87 Difference]: Start difference. First operand 276 states and 282 transitions. Second operand 26 states. [2020-10-28 08:58:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:18,752 INFO L93 Difference]: Finished difference Result 488 states and 503 transitions. [2020-10-28 08:58:18,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:58:18,753 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 271 [2020-10-28 08:58:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:18,755 INFO L225 Difference]: With dead ends: 488 [2020-10-28 08:58:18,755 INFO L226 Difference]: Without dead ends: 291 [2020-10-28 08:58:18,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:58:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-28 08:58:18,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 286. [2020-10-28 08:58:18,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-28 08:58:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 292 transitions. [2020-10-28 08:58:18,765 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 292 transitions. Word has length 271 [2020-10-28 08:58:18,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:18,765 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 292 transitions. [2020-10-28 08:58:18,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:58:18,766 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 292 transitions. [2020-10-28 08:58:18,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-28 08:58:18,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:18,768 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 13, 13, 1, 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 08:58:18,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 08:58:18,768 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:18,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:18,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1158396882, now seen corresponding path program 34 times [2020-10-28 08:58:18,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:18,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935444306] [2020-10-28 08:58:18,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:18,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:18,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:19,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:19,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:23,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:23,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-28 08:58:23,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:23,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-28 08:58:23,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:23,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:58:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:58:23,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:24,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:24,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:24,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:24,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:24,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:24,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:24,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:24,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:24,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:24,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:24,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:24,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2814 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2645 trivial. 0 not checked. [2020-10-28 08:58:24,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935444306] [2020-10-28 08:58:24,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:24,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:58:24,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992657216] [2020-10-28 08:58:24,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:58:24,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:24,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:58:24,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:58:24,167 INFO L87 Difference]: Start difference. First operand 286 states and 292 transitions. Second operand 17 states. [2020-10-28 08:58:24,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:24,381 INFO L93 Difference]: Finished difference Result 542 states and 554 transitions. [2020-10-28 08:58:24,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:58:24,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 281 [2020-10-28 08:58:24,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:24,384 INFO L225 Difference]: With dead ends: 542 [2020-10-28 08:58:24,384 INFO L226 Difference]: Without dead ends: 289 [2020-10-28 08:58:24,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:58:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-28 08:58:24,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2020-10-28 08:58:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-28 08:58:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 294 transitions. [2020-10-28 08:58:24,394 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 294 transitions. Word has length 281 [2020-10-28 08:58:24,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:24,394 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 294 transitions. [2020-10-28 08:58:24,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:58:24,394 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 294 transitions. [2020-10-28 08:58:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-28 08:58:24,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:24,396 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 14, 14, 1, 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 08:58:24,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 08:58:24,397 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:24,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:24,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1718018096, now seen corresponding path program 35 times [2020-10-28 08:58:24,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:24,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915080441] [2020-10-28 08:58:24,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:24,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:24,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:24,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:24,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:29,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:29,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-28 08:58:29,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:29,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5196 [2020-10-28 08:58:29,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:29,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:29,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 08:58:29,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 08:58:29,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 08:58:29,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:30,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:30,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:30,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:30,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:30,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:30,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:30,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:30,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:30,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:30,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:30,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:30,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2841 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-10-28 08:58:30,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915080441] [2020-10-28 08:58:30,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:30,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 08:58:30,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441587534] [2020-10-28 08:58:30,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 08:58:30,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:30,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 08:58:30,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:58:30,233 INFO L87 Difference]: Start difference. First operand 288 states and 294 transitions. Second operand 27 states. [2020-10-28 08:58:31,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:31,093 INFO L93 Difference]: Finished difference Result 508 states and 523 transitions. [2020-10-28 08:58:31,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 08:58:31,094 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 283 [2020-10-28 08:58:31,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:31,096 INFO L225 Difference]: With dead ends: 508 [2020-10-28 08:58:31,096 INFO L226 Difference]: Without dead ends: 303 [2020-10-28 08:58:31,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:58:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-28 08:58:31,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 298. [2020-10-28 08:58:31,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-28 08:58:31,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 304 transitions. [2020-10-28 08:58:31,106 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 304 transitions. Word has length 283 [2020-10-28 08:58:31,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:31,107 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 304 transitions. [2020-10-28 08:58:31,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 08:58:31,107 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 304 transitions. [2020-10-28 08:58:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-28 08:58:31,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:31,109 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 14, 14, 1, 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 08:58:31,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 08:58:31,109 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:31,110 INFO L82 PathProgramCache]: Analyzing trace with hash -2138609210, now seen corresponding path program 36 times [2020-10-28 08:58:31,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:31,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911613374] [2020-10-28 08:58:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:31,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:31,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:31,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:31,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking...