/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_init7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:25:27,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:25:27,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:25:27,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:25:27,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:25:27,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:25:27,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:25:27,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:25:27,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:25:27,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:25:27,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:25:27,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:25:27,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:25:27,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:25:27,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:25:27,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:25:27,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:25:27,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:25:27,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:25:27,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:25:27,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:25:27,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:25:27,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:25:27,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:25:27,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:25:27,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:25:27,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:25:27,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:25:27,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:25:27,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:25:27,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:25:27,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:25:27,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:25:27,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:25:27,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:25:27,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:25:27,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:25:27,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:25:27,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:25:27,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:25:27,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:25:27,979 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 [2020-10-26 19:25:28,024 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:25:28,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:25:28,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:25:28,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:25:28,030 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:25:28,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:25:28,030 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:25:28,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:25:28,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:25:28,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:25:28,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:25:28,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:25:28,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:25:28,033 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:25:28,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:25:28,033 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:25:28,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:25:28,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:25:28,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:25:28,034 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:25:28,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:25:28,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:25:28,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:25:28,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:25:28,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:25:28,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:25:28,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:25:28,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:25:28,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:25:28,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:25:28,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:25:28,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:25:28,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:25:28,530 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:25:28,531 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:25:28,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2020-10-26 19:25:28,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64e2ce91d/bef8ff1c6cf04d72a378a5151ddb0695/FLAG05f65ff75 [2020-10-26 19:25:29,237 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:25:29,238 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2020-10-26 19:25:29,246 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64e2ce91d/bef8ff1c6cf04d72a378a5151ddb0695/FLAG05f65ff75 [2020-10-26 19:25:29,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64e2ce91d/bef8ff1c6cf04d72a378a5151ddb0695 [2020-10-26 19:25:29,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:25:29,602 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:25:29,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:29,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:25:29,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:25:29,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:29" (1/1) ... [2020-10-26 19:25:29,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@677c02ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:29, skipping insertion in model container [2020-10-26 19:25:29,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:29" (1/1) ... [2020-10-26 19:25:29,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:25:29,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:25:29,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:29,834 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:25:29,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:29,881 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:25:29,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:29 WrapperNode [2020-10-26 19:25:29,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:29,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:25:29,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:25:29,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:25:29,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:29" (1/1) ... [2020-10-26 19:25:29,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:29" (1/1) ... [2020-10-26 19:25:29,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:29" (1/1) ... [2020-10-26 19:25:29,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:29" (1/1) ... [2020-10-26 19:25:29,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:29" (1/1) ... [2020-10-26 19:25:29,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:29" (1/1) ... [2020-10-26 19:25:29,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:29" (1/1) ... [2020-10-26 19:25:29,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:25:29,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:25:29,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:25:29,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:25:29,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:29" (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 [2020-10-26 19:25:30,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:25:30,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:25:30,026 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:25:30,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:25:30,027 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:25:30,027 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:25:30,027 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:25:30,028 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:25:30,028 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:25:30,028 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:25:30,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:25:30,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:25:30,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:25:30,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:25:30,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:25:30,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:25:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:25:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:25:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:25:30,502 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:25:30,502 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-26 19:25:30,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:30 BoogieIcfgContainer [2020-10-26 19:25:30,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:25:30,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:25:30,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:25:30,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:25:30,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:25:29" (1/3) ... [2020-10-26 19:25:30,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea5e799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:30, skipping insertion in model container [2020-10-26 19:25:30,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:29" (2/3) ... [2020-10-26 19:25:30,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea5e799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:30, skipping insertion in model container [2020-10-26 19:25:30,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:30" (3/3) ... [2020-10-26 19:25:30,515 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-2.i [2020-10-26 19:25:30,531 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:25:30,536 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:25:30,552 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:25:30,583 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:25:30,583 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:25:30,584 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:25:30,584 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:25:30,584 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:25:30,584 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:25:30,584 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:25:30,585 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:25:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-26 19:25:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:25:30,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:30,614 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] [2020-10-26 19:25:30,614 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:30,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:30,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1254713614, now seen corresponding path program 1 times [2020-10-26 19:25:30,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:30,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177076028] [2020-10-26 19:25:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:30,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:31,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:31,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:31,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:32,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:32,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:25:32,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:25:32,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1733 [2020-10-26 19:25:32,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:32,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:25:32,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:32,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:25:32,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:25:32,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:32,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:32,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:32,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:32,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:32,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:25:32,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:32,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:25:32,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177076028] [2020-10-26 19:25:32,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:25:32,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:25:32,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707031350] [2020-10-26 19:25:32,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:25:32,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:32,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:25:32,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:25:32,720 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-10-26 19:25:33,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:33,002 INFO L93 Difference]: Finished difference Result 77 states and 125 transitions. [2020-10-26 19:25:33,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:25:33,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-26 19:25:33,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:33,014 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:25:33,014 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:25:33,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:25:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:25:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-26 19:25:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:25:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-26 19:25:33,096 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 27 [2020-10-26 19:25:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:33,096 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-26 19:25:33,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:25:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-26 19:25:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:25:33,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:33,100 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] [2020-10-26 19:25:33,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:25:33,102 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:33,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:33,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2123827569, now seen corresponding path program 1 times [2020-10-26 19:25:33,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:33,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673545680] [2020-10-26 19:25:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:33,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:38,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:38,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:25:38,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:25:38,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:25:38,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:38,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:25:38,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:38,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:25:38,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:38,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:38,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:38,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:38,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:38,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:38,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:25:38,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:38,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:38,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:38,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:38,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:25:38,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673545680] [2020-10-26 19:25:38,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:38,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:25:38,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568991205] [2020-10-26 19:25:38,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:25:38,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:38,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:25:38,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:25:38,245 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 5 states. [2020-10-26 19:25:38,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:38,485 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-10-26 19:25:38,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:25:38,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-26 19:25:38,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:38,487 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:25:38,487 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:25:38,489 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 [2020-10-26 19:25:38,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:25:38,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-26 19:25:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:25:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-26 19:25:38,503 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 34 [2020-10-26 19:25:38,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:38,503 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-26 19:25:38,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:25:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-26 19:25:38,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:25:38,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:38,505 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:25:38,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:25:38,506 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:38,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:38,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1509369946, now seen corresponding path program 2 times [2020-10-26 19:25:38,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:38,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901189346] [2020-10-26 19:25:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:38,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:38,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:38,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:38,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:38,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:38,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:43,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:43,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:25:43,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:25:43,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:25:43,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:43,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:25:43,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:43,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:25:43,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:43,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:43,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:43,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:43,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:43,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:43,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:25:43,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:43,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:43,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:43,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:43,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:25:43,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901189346] [2020-10-26 19:25:43,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:43,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:25:43,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447817720] [2020-10-26 19:25:43,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:25:43,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:43,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:25:43,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:25:43,720 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2020-10-26 19:25:44,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:44,066 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-10-26 19:25:44,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:25:44,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-26 19:25:44,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:44,069 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:25:44,069 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:25:44,073 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 [2020-10-26 19:25:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:25:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-26 19:25:44,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:25:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-26 19:25:44,093 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 41 [2020-10-26 19:25:44,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:44,094 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-26 19:25:44,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:25:44,094 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-26 19:25:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:25:44,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:44,099 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:25:44,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:25:44,100 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:44,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2004918481, now seen corresponding path program 3 times [2020-10-26 19:25:44,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:44,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362970577] [2020-10-26 19:25:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:44,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:44,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:44,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:44,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:44,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:44,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:49,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:49,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:25:49,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:25:49,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:25:49,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:49,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:25:49,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:49,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:25:49,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:25:49,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:49,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:49,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:49,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:49,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:49,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:25:49,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:49,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:49,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:49,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:49,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:25:49,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362970577] [2020-10-26 19:25:49,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:49,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:25:49,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352745338] [2020-10-26 19:25:49,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:25:49,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:49,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:25:49,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:25:49,298 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 7 states. [2020-10-26 19:25:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:49,556 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2020-10-26 19:25:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:25:49,557 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-10-26 19:25:49,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:49,558 INFO L225 Difference]: With dead ends: 103 [2020-10-26 19:25:49,558 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:25:49,559 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 [2020-10-26 19:25:49,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:25:49,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-26 19:25:49,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:25:49,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-26 19:25:49,569 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 48 [2020-10-26 19:25:49,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:49,569 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-26 19:25:49,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:25:49,570 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-26 19:25:49,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:25:49,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:49,571 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1] [2020-10-26 19:25:49,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:25:49,572 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:49,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:49,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1774816954, now seen corresponding path program 4 times [2020-10-26 19:25:49,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:49,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391360757] [2020-10-26 19:25:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:49,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:49,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:49,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:49,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:49,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:50,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:54,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:54,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:25:54,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:25:54,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:25:54,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:54,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:25:54,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:54,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:25:54,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:25:54,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:54,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:54,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:54,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:54,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:54,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:25:54,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:54,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:54,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:54,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:54,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:25:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-26 19:25:54,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391360757] [2020-10-26 19:25:54,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:54,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:25:54,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573931562] [2020-10-26 19:25:54,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:25:54,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:54,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:25:54,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:25:54,797 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 8 states. [2020-10-26 19:25:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:55,107 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-10-26 19:25:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:25:55,109 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-26 19:25:55,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:55,110 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:25:55,110 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:25:55,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:25:55,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:25:55,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-26 19:25:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:25:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-26 19:25:55,120 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 55 [2020-10-26 19:25:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:55,120 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-26 19:25:55,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:25:55,121 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-26 19:25:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:25:55,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:55,122 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 1, 1] [2020-10-26 19:25:55,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:25:55,122 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:55,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:55,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1332096975, now seen corresponding path program 5 times [2020-10-26 19:25:55,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:55,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287168533] [2020-10-26 19:25:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:55,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:55,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:55,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:55,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:55,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:55,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:00,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:00,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:26:00,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:00,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:26:00,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:00,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:26:00,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:00,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:26:00,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:00,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:00,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:00,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:00,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:00,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:00,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:00,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:00,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:00,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:00,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:00,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-26 19:26:00,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287168533] [2020-10-26 19:26:00,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:00,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:26:00,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116733240] [2020-10-26 19:26:00,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:26:00,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:00,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:26:00,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:26:00,460 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 9 states. [2020-10-26 19:26:00,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:00,865 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2020-10-26 19:26:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:26:00,866 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-10-26 19:26:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:00,868 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:26:00,868 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:26:00,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:26:00,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:26:00,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-26 19:26:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:26:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-10-26 19:26:00,879 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 62 [2020-10-26 19:26:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:00,880 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-10-26 19:26:00,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:26:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-10-26 19:26:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:26:00,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:00,881 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 1, 1] [2020-10-26 19:26:00,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:26:00,882 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:00,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1930890522, now seen corresponding path program 6 times [2020-10-26 19:26:00,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:00,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115472043] [2020-10-26 19:26:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:00,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:00,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:00,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:00,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:01,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:01,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:01,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:05,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:05,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:26:05,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:05,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:26:05,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:05,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:26:05,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:05,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:26:05,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:06,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:06,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:06,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:06,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:06,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:06,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:06,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:06,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:06,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:06,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:06,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-26 19:26:06,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115472043] [2020-10-26 19:26:06,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:06,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:26:06,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678327383] [2020-10-26 19:26:06,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:26:06,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:06,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:26:06,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:26:06,113 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 10 states. [2020-10-26 19:26:06,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:06,556 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2020-10-26 19:26:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:26:06,557 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-26 19:26:06,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:06,559 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:26:06,559 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 19:26:06,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:26:06,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 19:26:06,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-26 19:26:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:26:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-10-26 19:26:06,571 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 69 [2020-10-26 19:26:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:06,571 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-10-26 19:26:06,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:26:06,571 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-10-26 19:26:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:26:06,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:06,573 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 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, 1, 1] [2020-10-26 19:26:06,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:26:06,573 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:06,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:06,574 INFO L82 PathProgramCache]: Analyzing trace with hash -154101871, now seen corresponding path program 7 times [2020-10-26 19:26:06,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:06,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922953312] [2020-10-26 19:26:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:06,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:06,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:06,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:06,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:06,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:07,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:11,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:11,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:26:11,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:11,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:26:11,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:11,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:26:11,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:11,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:26:11,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:11,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:11,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:11,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:11,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:11,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:11,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:11,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:11,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:11,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:11,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:11,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-10-26 19:26:11,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922953312] [2020-10-26 19:26:11,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:11,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:26:11,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533115544] [2020-10-26 19:26:11,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:26:11,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:11,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:26:11,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:26:11,829 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 11 states. [2020-10-26 19:26:12,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:12,219 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2020-10-26 19:26:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:26:12,220 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-10-26 19:26:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:12,221 INFO L225 Difference]: With dead ends: 155 [2020-10-26 19:26:12,221 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:26:12,222 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 [2020-10-26 19:26:12,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:26:12,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-26 19:26:12,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:26:12,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-26 19:26:12,247 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 76 [2020-10-26 19:26:12,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:12,247 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-26 19:26:12,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:26:12,248 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-26 19:26:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:26:12,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:12,249 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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, 1, 1] [2020-10-26 19:26:12,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:26:12,250 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:12,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:12,254 INFO L82 PathProgramCache]: Analyzing trace with hash -705536890, now seen corresponding path program 8 times [2020-10-26 19:26:12,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:12,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152568625] [2020-10-26 19:26:12,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:12,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:12,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:12,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:12,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:12,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:17,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:17,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:26:17,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:17,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:26:17,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:26:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:26:17,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:17,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:17,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:17,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:17,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:17,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:17,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:17,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:17,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:17,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:17,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:17,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:26:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-26 19:26:17,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152568625] [2020-10-26 19:26:17,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:17,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:26:17,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780715601] [2020-10-26 19:26:17,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:26:17,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:17,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:26:17,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:26:17,567 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 12 states. [2020-10-26 19:26:18,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:18,033 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2020-10-26 19:26:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:26:18,033 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-10-26 19:26:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:18,034 INFO L225 Difference]: With dead ends: 168 [2020-10-26 19:26:18,035 INFO L226 Difference]: Without dead ends: 95 [2020-10-26 19:26:18,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:26:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-26 19:26:18,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-26 19:26:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:26:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2020-10-26 19:26:18,046 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 83 [2020-10-26 19:26:18,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:18,047 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2020-10-26 19:26:18,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:26:18,047 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2020-10-26 19:26:18,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:26:18,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:18,048 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 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, 1, 1] [2020-10-26 19:26:18,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:26:18,049 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:18,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:18,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1418917617, now seen corresponding path program 9 times [2020-10-26 19:26:18,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:18,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052336470] [2020-10-26 19:26:18,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:18,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:18,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:18,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:18,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:18,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:23,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:26:23,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:23,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:26:23,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:23,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:26:23,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:23,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:26:23,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:23,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:23,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:23,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:23,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:23,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:23,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:23,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:23,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:23,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:23,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-26 19:26:23,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052336470] [2020-10-26 19:26:23,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:23,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:26:23,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662626593] [2020-10-26 19:26:23,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:26:23,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:23,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:26:23,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:26:23,337 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 13 states. [2020-10-26 19:26:23,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:23,796 INFO L93 Difference]: Finished difference Result 181 states and 201 transitions. [2020-10-26 19:26:23,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:26:23,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 90 [2020-10-26 19:26:23,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:23,798 INFO L225 Difference]: With dead ends: 181 [2020-10-26 19:26:23,798 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:26:23,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:26:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:26:23,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-26 19:26:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:26:23,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2020-10-26 19:26:23,822 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 90 [2020-10-26 19:26:23,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:23,822 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2020-10-26 19:26:23,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:26:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2020-10-26 19:26:23,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:26:23,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:23,828 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 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, 1, 1] [2020-10-26 19:26:23,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:26:23,828 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:23,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:23,829 INFO L82 PathProgramCache]: Analyzing trace with hash 799321638, now seen corresponding path program 10 times [2020-10-26 19:26:23,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:23,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157044568] [2020-10-26 19:26:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:23,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:24,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:28,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:28,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:26:28,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:28,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:26:28,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:28,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:26:28,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:28,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:26:28,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:29,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:29,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:29,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:29,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:29,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:29,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:29,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:29,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:29,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:29,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:29,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-26 19:26:29,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157044568] [2020-10-26 19:26:29,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:29,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:26:29,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503736989] [2020-10-26 19:26:29,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:26:29,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:29,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:26:29,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:26:29,164 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 14 states. [2020-10-26 19:26:29,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:29,647 INFO L93 Difference]: Finished difference Result 194 states and 214 transitions. [2020-10-26 19:26:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:26:29,648 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 97 [2020-10-26 19:26:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:29,649 INFO L225 Difference]: With dead ends: 194 [2020-10-26 19:26:29,649 INFO L226 Difference]: Without dead ends: 109 [2020-10-26 19:26:29,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:26:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-26 19:26:29,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-26 19:26:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:26:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2020-10-26 19:26:29,670 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 97 [2020-10-26 19:26:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:29,670 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2020-10-26 19:26:29,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:26:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2020-10-26 19:26:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-26 19:26:29,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:29,671 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 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, 1, 1] [2020-10-26 19:26:29,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:26:29,672 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:29,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:29,674 INFO L82 PathProgramCache]: Analyzing trace with hash -238096815, now seen corresponding path program 11 times [2020-10-26 19:26:29,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:29,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669920957] [2020-10-26 19:26:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:29,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:29,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:29,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:29,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:29,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:34,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:34,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:26:34,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:34,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:26:34,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:34,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:26:34,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:34,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:26:34,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:35,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:35,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:35,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:35,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:35,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:35,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:35,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:35,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:35,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:35,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:35,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2020-10-26 19:26:35,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669920957] [2020-10-26 19:26:35,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:35,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:26:35,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358839687] [2020-10-26 19:26:35,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:26:35,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:35,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:26:35,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:26:35,048 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand 15 states. [2020-10-26 19:26:35,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:35,589 INFO L93 Difference]: Finished difference Result 207 states and 227 transitions. [2020-10-26 19:26:35,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:26:35,591 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 104 [2020-10-26 19:26:35,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:35,592 INFO L225 Difference]: With dead ends: 207 [2020-10-26 19:26:35,592 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:26:35,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:26:35,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:26:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-26 19:26:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-26 19:26:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2020-10-26 19:26:35,601 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 104 [2020-10-26 19:26:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:35,601 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2020-10-26 19:26:35,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:26:35,602 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2020-10-26 19:26:35,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-26 19:26:35,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:35,603 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 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, 1, 1] [2020-10-26 19:26:35,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:26:35,603 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:35,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:35,604 INFO L82 PathProgramCache]: Analyzing trace with hash -355342394, now seen corresponding path program 12 times [2020-10-26 19:26:35,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:35,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938423927] [2020-10-26 19:26:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:35,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:35,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:35,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:35,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:35,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:40,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:40,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-26 19:26:40,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:40,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:26:40,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:40,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:26:40,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:40,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:26:40,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:41,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:41,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:41,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:41,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:41,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:41,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:41,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:41,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:41,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:41,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:41,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2020-10-26 19:26:41,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938423927] [2020-10-26 19:26:41,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:41,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:26:41,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340184256] [2020-10-26 19:26:41,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:26:41,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:41,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:26:41,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:41,023 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand 16 states. [2020-10-26 19:26:41,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:41,647 INFO L93 Difference]: Finished difference Result 220 states and 240 transitions. [2020-10-26 19:26:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:26:41,648 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 111 [2020-10-26 19:26:41,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:41,649 INFO L225 Difference]: With dead ends: 220 [2020-10-26 19:26:41,649 INFO L226 Difference]: Without dead ends: 123 [2020-10-26 19:26:41,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:41,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-26 19:26:41,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-26 19:26:41,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-26 19:26:41,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2020-10-26 19:26:41,658 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 111 [2020-10-26 19:26:41,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:41,659 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2020-10-26 19:26:41,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:26:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2020-10-26 19:26:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-26 19:26:41,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:41,660 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 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, 1, 1] [2020-10-26 19:26:41,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:26:41,661 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:41,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:41,661 INFO L82 PathProgramCache]: Analyzing trace with hash -202211919, now seen corresponding path program 13 times [2020-10-26 19:26:41,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:41,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17976806] [2020-10-26 19:26:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:41,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:41,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:41,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:41,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:41,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:46,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:46,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:26:46,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:46,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:26:46,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:26:46,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:46,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:26:46,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:47,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:47,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:47,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:47,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:47,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:47,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:47,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:47,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:47,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:47,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2020-10-26 19:26:47,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17976806] [2020-10-26 19:26:47,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:47,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:26:47,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703849298] [2020-10-26 19:26:47,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:26:47,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:47,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:26:47,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:47,117 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand 17 states. [2020-10-26 19:26:47,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:47,667 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2020-10-26 19:26:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:26:47,667 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 118 [2020-10-26 19:26:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:47,669 INFO L225 Difference]: With dead ends: 233 [2020-10-26 19:26:47,669 INFO L226 Difference]: Without dead ends: 130 [2020-10-26 19:26:47,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:47,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-26 19:26:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-26 19:26:47,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:26:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 137 transitions. [2020-10-26 19:26:47,677 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 137 transitions. Word has length 118 [2020-10-26 19:26:47,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:47,678 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 137 transitions. [2020-10-26 19:26:47,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:26:47,678 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 137 transitions. [2020-10-26 19:26:47,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-26 19:26:47,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:47,679 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 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, 1, 1] [2020-10-26 19:26:47,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:26:47,680 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:47,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:47,680 INFO L82 PathProgramCache]: Analyzing trace with hash 181143910, now seen corresponding path program 14 times [2020-10-26 19:26:47,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:47,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531903537] [2020-10-26 19:26:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:47,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:48,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:52,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:52,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-26 19:26:52,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:52,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:26:52,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:52,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:26:52,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:52,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:26:52,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:53,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:53,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:53,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:53,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:53,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:53,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:53,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:53,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:53,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:53,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-26 19:26:53,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531903537] [2020-10-26 19:26:53,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:53,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:26:53,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992926241] [2020-10-26 19:26:53,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:26:53,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:53,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:26:53,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:53,178 INFO L87 Difference]: Start difference. First operand 130 states and 137 transitions. Second operand 18 states. [2020-10-26 19:26:53,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:53,737 INFO L93 Difference]: Finished difference Result 246 states and 266 transitions. [2020-10-26 19:26:53,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:26:53,738 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 125 [2020-10-26 19:26:53,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:53,739 INFO L225 Difference]: With dead ends: 246 [2020-10-26 19:26:53,739 INFO L226 Difference]: Without dead ends: 137 [2020-10-26 19:26:53,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:53,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-26 19:26:53,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-26 19:26:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-26 19:26:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 144 transitions. [2020-10-26 19:26:53,749 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 144 transitions. Word has length 125 [2020-10-26 19:26:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:53,749 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 144 transitions. [2020-10-26 19:26:53,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:26:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 144 transitions. [2020-10-26 19:26:53,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-26 19:26:53,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:53,751 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:53,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:26:53,752 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:53,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:53,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1575724305, now seen corresponding path program 15 times [2020-10-26 19:26:53,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:53,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600483803] [2020-10-26 19:26:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:53,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:54,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:54,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:58,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:58,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-26 19:26:58,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:58,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:26:58,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:58,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:26:58,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:58,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:26:58,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:59,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:59,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:59,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:59,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:59,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:59,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:59,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:59,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:59,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:59,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:59,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2020-10-26 19:26:59,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600483803] [2020-10-26 19:26:59,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:59,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:26:59,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330738408] [2020-10-26 19:26:59,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:26:59,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:59,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:26:59,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:26:59,233 INFO L87 Difference]: Start difference. First operand 137 states and 144 transitions. Second operand 19 states. [2020-10-26 19:26:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:59,886 INFO L93 Difference]: Finished difference Result 259 states and 279 transitions. [2020-10-26 19:26:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:26:59,887 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 132 [2020-10-26 19:26:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:59,889 INFO L225 Difference]: With dead ends: 259 [2020-10-26 19:26:59,889 INFO L226 Difference]: Without dead ends: 144 [2020-10-26 19:26:59,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:26:59,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-26 19:26:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-26 19:26:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-26 19:26:59,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 151 transitions. [2020-10-26 19:26:59,899 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 151 transitions. Word has length 132 [2020-10-26 19:26:59,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:59,899 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 151 transitions. [2020-10-26 19:26:59,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:26:59,899 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 151 transitions. [2020-10-26 19:26:59,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-26 19:26:59,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:59,901 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:59,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:26:59,902 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:59,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:59,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1701122822, now seen corresponding path program 16 times [2020-10-26 19:26:59,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:59,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635930351] [2020-10-26 19:26:59,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:59,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:00,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:00,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:00,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:00,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:04,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:04,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 19:27:04,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:04,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:27:04,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:04,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:27:04,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:04,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:27:04,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:05,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:05,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:05,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:05,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:05,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:05,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:27:05,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:05,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:05,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:05,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:05,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2020-10-26 19:27:05,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635930351] [2020-10-26 19:27:05,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:05,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:27:05,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925279060] [2020-10-26 19:27:05,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:27:05,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:05,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:27:05,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:27:05,478 INFO L87 Difference]: Start difference. First operand 144 states and 151 transitions. Second operand 20 states. [2020-10-26 19:27:06,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:06,248 INFO L93 Difference]: Finished difference Result 272 states and 292 transitions. [2020-10-26 19:27:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:27:06,249 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 139 [2020-10-26 19:27:06,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:06,251 INFO L225 Difference]: With dead ends: 272 [2020-10-26 19:27:06,251 INFO L226 Difference]: Without dead ends: 151 [2020-10-26 19:27:06,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:27:06,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-26 19:27:06,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-26 19:27:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-26 19:27:06,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 158 transitions. [2020-10-26 19:27:06,260 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 158 transitions. Word has length 139 [2020-10-26 19:27:06,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:06,261 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 158 transitions. [2020-10-26 19:27:06,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:27:06,261 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 158 transitions. [2020-10-26 19:27:06,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-26 19:27:06,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:06,262 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:06,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:27:06,263 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:06,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:06,263 INFO L82 PathProgramCache]: Analyzing trace with hash -265788303, now seen corresponding path program 17 times [2020-10-26 19:27:06,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:06,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898420762] [2020-10-26 19:27:06,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:06,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:06,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:06,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:06,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:07,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:11,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:11,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-26 19:27:11,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:11,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:27:11,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:11,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:27:11,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:11,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:27:11,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:11,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:11,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:11,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:11,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:11,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:11,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:11,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:11,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:11,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:11,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:11,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2020-10-26 19:27:11,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898420762] [2020-10-26 19:27:11,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:11,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:27:11,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546459670] [2020-10-26 19:27:11,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:27:11,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:11,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:27:11,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:27:11,901 INFO L87 Difference]: Start difference. First operand 151 states and 158 transitions. Second operand 21 states. [2020-10-26 19:27:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:12,633 INFO L93 Difference]: Finished difference Result 285 states and 305 transitions. [2020-10-26 19:27:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:27:12,634 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 146 [2020-10-26 19:27:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:12,636 INFO L225 Difference]: With dead ends: 285 [2020-10-26 19:27:12,636 INFO L226 Difference]: Without dead ends: 158 [2020-10-26 19:27:12,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:27:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-26 19:27:12,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-26 19:27:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-26 19:27:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 165 transitions. [2020-10-26 19:27:12,646 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 165 transitions. Word has length 146 [2020-10-26 19:27:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:12,646 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 165 transitions. [2020-10-26 19:27:12,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:27:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 165 transitions. [2020-10-26 19:27:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-26 19:27:12,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:12,648 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:12,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:27:12,648 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:12,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1024523098, now seen corresponding path program 18 times [2020-10-26 19:27:12,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:12,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738467409] [2020-10-26 19:27:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:12,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:12,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:12,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:12,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:13,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:17,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:17,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-26 19:27:17,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:17,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:27:17,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:17,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:27:17,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:17,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:27:17,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:18,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:18,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:18,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:18,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:18,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:18,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:18,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:18,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:18,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:18,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:18,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2020-10-26 19:27:18,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738467409] [2020-10-26 19:27:18,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:18,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:27:18,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026700591] [2020-10-26 19:27:18,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:27:18,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:18,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:27:18,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:27:18,337 INFO L87 Difference]: Start difference. First operand 158 states and 165 transitions. Second operand 22 states. [2020-10-26 19:27:19,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:19,171 INFO L93 Difference]: Finished difference Result 298 states and 318 transitions. [2020-10-26 19:27:19,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:27:19,172 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 153 [2020-10-26 19:27:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:19,174 INFO L225 Difference]: With dead ends: 298 [2020-10-26 19:27:19,174 INFO L226 Difference]: Without dead ends: 165 [2020-10-26 19:27:19,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:27:19,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-26 19:27:19,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2020-10-26 19:27:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-26 19:27:19,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 172 transitions. [2020-10-26 19:27:19,184 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 172 transitions. Word has length 153 [2020-10-26 19:27:19,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:19,185 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 172 transitions. [2020-10-26 19:27:19,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:27:19,185 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 172 transitions. [2020-10-26 19:27:19,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-26 19:27:19,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:19,187 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:19,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:27:19,187 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:19,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:19,188 INFO L82 PathProgramCache]: Analyzing trace with hash 144096209, now seen corresponding path program 19 times [2020-10-26 19:27:19,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:19,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501192877] [2020-10-26 19:27:19,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:19,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:19,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:19,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:19,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:20,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:24,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:24,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-26 19:27:24,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:24,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:27:24,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:24,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:27:24,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:24,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:27:24,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:24,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:24,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:24,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:24,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:24,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:24,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:24,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:24,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:24,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:24,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:24,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2020-10-26 19:27:24,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501192877] [2020-10-26 19:27:24,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:24,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:27:24,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252967704] [2020-10-26 19:27:24,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:27:24,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:24,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:27:24,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:27:24,940 INFO L87 Difference]: Start difference. First operand 165 states and 172 transitions. Second operand 23 states. [2020-10-26 19:27:25,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:25,809 INFO L93 Difference]: Finished difference Result 311 states and 331 transitions. [2020-10-26 19:27:25,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:27:25,810 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2020-10-26 19:27:25,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:25,811 INFO L225 Difference]: With dead ends: 311 [2020-10-26 19:27:25,811 INFO L226 Difference]: Without dead ends: 172 [2020-10-26 19:27:25,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:27:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-26 19:27:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-26 19:27:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-26 19:27:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 179 transitions. [2020-10-26 19:27:25,821 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 179 transitions. Word has length 160 [2020-10-26 19:27:25,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:25,822 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 179 transitions. [2020-10-26 19:27:25,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:27:25,822 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 179 transitions. [2020-10-26 19:27:25,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-26 19:27:25,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:25,824 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:25,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:27:25,825 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:25,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:25,825 INFO L82 PathProgramCache]: Analyzing trace with hash -29630906, now seen corresponding path program 20 times [2020-10-26 19:27:25,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:25,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61437116] [2020-10-26 19:27:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:25,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:26,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:26,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:26,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:26,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:30,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:30,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-26 19:27:30,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:30,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:27:30,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:30,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:27:30,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:30,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:27:30,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:31,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:31,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:31,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:31,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:31,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:31,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:31,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:31,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:31,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:31,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:31,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-26 19:27:31,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61437116] [2020-10-26 19:27:31,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:31,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:27:31,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369420143] [2020-10-26 19:27:31,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:27:31,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:31,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:27:31,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:27:31,622 INFO L87 Difference]: Start difference. First operand 172 states and 179 transitions. Second operand 24 states. [2020-10-26 19:27:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:32,468 INFO L93 Difference]: Finished difference Result 324 states and 344 transitions. [2020-10-26 19:27:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:27:32,469 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 167 [2020-10-26 19:27:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:32,471 INFO L225 Difference]: With dead ends: 324 [2020-10-26 19:27:32,471 INFO L226 Difference]: Without dead ends: 179 [2020-10-26 19:27:32,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:27:32,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-26 19:27:32,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2020-10-26 19:27:32,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-26 19:27:32,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 186 transitions. [2020-10-26 19:27:32,482 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 186 transitions. Word has length 167 [2020-10-26 19:27:32,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:32,482 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 186 transitions. [2020-10-26 19:27:32,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:27:32,482 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 186 transitions. [2020-10-26 19:27:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-26 19:27:32,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:32,484 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:32,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:27:32,485 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2103137487, now seen corresponding path program 21 times [2020-10-26 19:27:32,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:32,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692567916] [2020-10-26 19:27:32,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:32,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:32,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:32,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:32,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:33,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:37,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:37,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 19:27:37,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:37,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:27:37,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:37,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:27:37,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:37,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:27:37,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:38,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:38,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:38,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:38,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:38,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:38,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:38,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:38,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:38,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:38,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:38,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2020-10-26 19:27:38,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692567916] [2020-10-26 19:27:38,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:38,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:27:38,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301404433] [2020-10-26 19:27:38,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:27:38,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:38,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:27:38,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:27:38,391 INFO L87 Difference]: Start difference. First operand 179 states and 186 transitions. Second operand 25 states. [2020-10-26 19:27:39,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:39,210 INFO L93 Difference]: Finished difference Result 337 states and 357 transitions. [2020-10-26 19:27:39,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:27:39,211 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 174 [2020-10-26 19:27:39,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:39,213 INFO L225 Difference]: With dead ends: 337 [2020-10-26 19:27:39,213 INFO L226 Difference]: Without dead ends: 186 [2020-10-26 19:27:39,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:27:39,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-26 19:27:39,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-26 19:27:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-26 19:27:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 193 transitions. [2020-10-26 19:27:39,224 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 193 transitions. Word has length 174 [2020-10-26 19:27:39,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:39,224 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 193 transitions. [2020-10-26 19:27:39,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:27:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 193 transitions. [2020-10-26 19:27:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-26 19:27:39,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:39,226 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:39,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:27:39,226 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:39,227 INFO L82 PathProgramCache]: Analyzing trace with hash 614309862, now seen corresponding path program 22 times [2020-10-26 19:27:39,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:39,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036377565] [2020-10-26 19:27:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:39,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:39,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:39,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:39,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:40,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:44,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:44,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-26 19:27:44,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:44,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 19:27:44,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:44,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:27:44,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:44,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:27:44,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:45,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:45,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:45,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:45,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:45,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:45,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:45,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:45,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:45,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:45,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:45,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2020-10-26 19:27:45,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036377565] [2020-10-26 19:27:45,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:45,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:27:45,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969974415] [2020-10-26 19:27:45,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:27:45,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:45,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:27:45,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:27:45,200 INFO L87 Difference]: Start difference. First operand 186 states and 193 transitions. Second operand 26 states. [2020-10-26 19:27:46,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:46,021 INFO L93 Difference]: Finished difference Result 350 states and 370 transitions. [2020-10-26 19:27:46,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:27:46,022 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 181 [2020-10-26 19:27:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:46,023 INFO L225 Difference]: With dead ends: 350 [2020-10-26 19:27:46,024 INFO L226 Difference]: Without dead ends: 193 [2020-10-26 19:27:46,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:27:46,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-26 19:27:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-10-26 19:27:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-26 19:27:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 200 transitions. [2020-10-26 19:27:46,035 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 200 transitions. Word has length 181 [2020-10-26 19:27:46,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:46,035 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 200 transitions. [2020-10-26 19:27:46,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:27:46,035 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 200 transitions. [2020-10-26 19:27:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-26 19:27:46,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:46,036 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:46,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:27:46,037 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:46,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:46,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1757400431, now seen corresponding path program 23 times [2020-10-26 19:27:46,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:46,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755530912] [2020-10-26 19:27:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:46,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:46,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:46,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:46,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:47,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:51,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:51,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-26 19:27:51,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:51,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:27:51,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:51,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:27:51,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:51,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:27:51,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:51,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:52,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:52,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:52,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:52,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:52,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:27:52,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:52,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:52,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:52,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:52,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2020-10-26 19:27:52,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755530912] [2020-10-26 19:27:52,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:52,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:27:52,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513905531] [2020-10-26 19:27:52,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:27:52,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:52,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:27:52,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:27:52,023 INFO L87 Difference]: Start difference. First operand 193 states and 200 transitions. Second operand 27 states. [2020-10-26 19:27:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:53,074 INFO L93 Difference]: Finished difference Result 363 states and 383 transitions. [2020-10-26 19:27:53,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:27:53,075 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 188 [2020-10-26 19:27:53,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:53,077 INFO L225 Difference]: With dead ends: 363 [2020-10-26 19:27:53,077 INFO L226 Difference]: Without dead ends: 200 [2020-10-26 19:27:53,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:27:53,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-26 19:27:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2020-10-26 19:27:53,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-26 19:27:53,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 207 transitions. [2020-10-26 19:27:53,088 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 207 transitions. Word has length 188 [2020-10-26 19:27:53,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:53,088 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 207 transitions. [2020-10-26 19:27:53,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:27:53,088 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 207 transitions. [2020-10-26 19:27:53,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-26 19:27:53,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:53,090 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:53,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:27:53,090 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:53,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1780070010, now seen corresponding path program 24 times [2020-10-26 19:27:53,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:53,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102181765] [2020-10-26 19:27:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:53,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:53,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:53,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:53,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:54,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:58,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:58,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-26 19:27:58,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:58,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:27:58,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:58,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:27:58,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:58,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:27:58,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:59,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:59,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:59,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:59,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:59,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:59,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:27:59,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:59,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-26 19:27:59,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102181765] [2020-10-26 19:27:59,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:59,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:27:59,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913719431] [2020-10-26 19:27:59,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:27:59,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:59,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:27:59,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:27:59,188 INFO L87 Difference]: Start difference. First operand 200 states and 207 transitions. Second operand 28 states. [2020-10-26 19:28:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:00,192 INFO L93 Difference]: Finished difference Result 376 states and 396 transitions. [2020-10-26 19:28:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:28:00,193 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 195 [2020-10-26 19:28:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:00,195 INFO L225 Difference]: With dead ends: 376 [2020-10-26 19:28:00,195 INFO L226 Difference]: Without dead ends: 207 [2020-10-26 19:28:00,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:28:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-26 19:28:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-10-26 19:28:00,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-26 19:28:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 214 transitions. [2020-10-26 19:28:00,204 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 214 transitions. Word has length 195 [2020-10-26 19:28:00,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:00,205 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 214 transitions. [2020-10-26 19:28:00,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:28:00,205 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 214 transitions. [2020-10-26 19:28:00,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 19:28:00,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:00,206 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:00,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:28:00,206 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:00,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:00,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1126739471, now seen corresponding path program 25 times [2020-10-26 19:28:00,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:00,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411857737] [2020-10-26 19:28:00,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:00,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:00,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:00,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:00,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:01,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:05,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:05,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-26 19:28:05,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:05,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 19:28:05,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:05,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:28:05,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:05,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:28:05,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:06,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:06,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:06,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:06,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:06,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:06,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:06,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:06,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:06,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:06,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:06,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2020-10-26 19:28:06,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411857737] [2020-10-26 19:28:06,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:06,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:28:06,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775905829] [2020-10-26 19:28:06,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:28:06,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:06,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:28:06,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:28:06,276 INFO L87 Difference]: Start difference. First operand 207 states and 214 transitions. Second operand 29 states. [2020-10-26 19:28:07,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:07,406 INFO L93 Difference]: Finished difference Result 389 states and 409 transitions. [2020-10-26 19:28:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:28:07,407 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 202 [2020-10-26 19:28:07,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:07,409 INFO L225 Difference]: With dead ends: 389 [2020-10-26 19:28:07,409 INFO L226 Difference]: Without dead ends: 214 [2020-10-26 19:28:07,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:28:07,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-26 19:28:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-26 19:28:07,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-26 19:28:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 221 transitions. [2020-10-26 19:28:07,421 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 221 transitions. Word has length 202 [2020-10-26 19:28:07,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:07,421 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 221 transitions. [2020-10-26 19:28:07,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:28:07,422 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 221 transitions. [2020-10-26 19:28:07,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-26 19:28:07,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:07,423 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:07,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:28:07,423 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:07,424 INFO L82 PathProgramCache]: Analyzing trace with hash 610786086, now seen corresponding path program 26 times [2020-10-26 19:28:07,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:07,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726993020] [2020-10-26 19:28:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:07,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:07,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:07,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:07,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:09,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:12,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:12,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-26 19:28:12,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:12,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 19:28:12,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:12,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:28:12,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:12,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:28:12,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:13,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:13,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:13,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:13,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:13,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:13,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:28:13,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:13,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:13,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:13,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:13,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2457 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2106 trivial. 0 not checked. [2020-10-26 19:28:13,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726993020] [2020-10-26 19:28:13,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:13,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:28:13,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899584910] [2020-10-26 19:28:13,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:28:13,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:13,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:28:13,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:28:13,642 INFO L87 Difference]: Start difference. First operand 214 states and 221 transitions. Second operand 30 states. [2020-10-26 19:28:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:14,729 INFO L93 Difference]: Finished difference Result 402 states and 422 transitions. [2020-10-26 19:28:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:28:14,730 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 209 [2020-10-26 19:28:14,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:14,734 INFO L225 Difference]: With dead ends: 402 [2020-10-26 19:28:14,734 INFO L226 Difference]: Without dead ends: 221 [2020-10-26 19:28:14,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:28:14,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-26 19:28:14,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-10-26 19:28:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-26 19:28:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 228 transitions. [2020-10-26 19:28:14,745 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 228 transitions. Word has length 209 [2020-10-26 19:28:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:14,745 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 228 transitions. [2020-10-26 19:28:14,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:28:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 228 transitions. [2020-10-26 19:28:14,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-26 19:28:14,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:14,747 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:14,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:28:14,747 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:14,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2024273583, now seen corresponding path program 27 times [2020-10-26 19:28:14,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:14,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039091526] [2020-10-26 19:28:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:14,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:15,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:15,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:15,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:16,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:19,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:19,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-26 19:28:19,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:19,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:28:19,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:19,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:28:19,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:19,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:28:19,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:20,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:20,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:20,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:20,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:20,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:20,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:20,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:20,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:20,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:20,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:20,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2268 trivial. 0 not checked. [2020-10-26 19:28:21,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039091526] [2020-10-26 19:28:21,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:21,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:28:21,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194170027] [2020-10-26 19:28:21,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:28:21,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:21,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:28:21,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:28:21,020 INFO L87 Difference]: Start difference. First operand 221 states and 228 transitions. Second operand 31 states. [2020-10-26 19:28:22,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:22,162 INFO L93 Difference]: Finished difference Result 415 states and 435 transitions. [2020-10-26 19:28:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:28:22,163 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 216 [2020-10-26 19:28:22,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:22,165 INFO L225 Difference]: With dead ends: 415 [2020-10-26 19:28:22,166 INFO L226 Difference]: Without dead ends: 228 [2020-10-26 19:28:22,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:28:22,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-26 19:28:22,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2020-10-26 19:28:22,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-26 19:28:22,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 235 transitions. [2020-10-26 19:28:22,177 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 235 transitions. Word has length 216 [2020-10-26 19:28:22,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:22,177 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 235 transitions. [2020-10-26 19:28:22,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:28:22,177 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 235 transitions. [2020-10-26 19:28:22,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-26 19:28:22,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:22,179 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:22,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:28:22,179 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:22,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:22,180 INFO L82 PathProgramCache]: Analyzing trace with hash 888427718, now seen corresponding path program 28 times [2020-10-26 19:28:22,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:22,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115564848] [2020-10-26 19:28:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:22,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:22,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:22,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:22,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:24,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:27,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:27,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-26 19:28:27,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:27,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 19:28:27,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:27,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:28:27,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:27,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:28:27,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:28,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:28,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:28,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:28,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:28,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:28,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:28,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:28,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:28,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:28,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:28,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2020-10-26 19:28:28,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115564848] [2020-10-26 19:28:28,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:28,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:28:28,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137829495] [2020-10-26 19:28:28,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:28:28,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:28,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:28:28,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:28:28,585 INFO L87 Difference]: Start difference. First operand 228 states and 235 transitions. Second operand 32 states. [2020-10-26 19:28:29,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:29,753 INFO L93 Difference]: Finished difference Result 428 states and 448 transitions. [2020-10-26 19:28:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:28:29,754 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 223 [2020-10-26 19:28:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:29,757 INFO L225 Difference]: With dead ends: 428 [2020-10-26 19:28:29,757 INFO L226 Difference]: Without dead ends: 235 [2020-10-26 19:28:29,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:28:29,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-26 19:28:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2020-10-26 19:28:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-26 19:28:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 242 transitions. [2020-10-26 19:28:29,767 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 242 transitions. Word has length 223 [2020-10-26 19:28:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:29,768 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 242 transitions. [2020-10-26 19:28:29,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:28:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 242 transitions. [2020-10-26 19:28:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-26 19:28:29,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:29,769 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:29,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:28:29,770 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:29,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:29,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2010097487, now seen corresponding path program 29 times [2020-10-26 19:28:29,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:29,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638462337] [2020-10-26 19:28:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:29,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:30,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:30,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:30,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:31,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:34,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:34,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-26 19:28:34,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:34,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 19:28:34,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:34,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:28:34,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:34,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:28:34,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:36,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:36,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:36,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:36,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:36,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:36,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:36,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:36,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:36,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:36,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:36,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2610 trivial. 0 not checked. [2020-10-26 19:28:36,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638462337] [2020-10-26 19:28:36,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:36,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:28:36,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224736561] [2020-10-26 19:28:36,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:28:36,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:36,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:28:36,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:28:36,297 INFO L87 Difference]: Start difference. First operand 235 states and 242 transitions. Second operand 33 states. [2020-10-26 19:28:37,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:37,394 INFO L93 Difference]: Finished difference Result 441 states and 461 transitions. [2020-10-26 19:28:37,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:28:37,395 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 230 [2020-10-26 19:28:37,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:37,397 INFO L225 Difference]: With dead ends: 441 [2020-10-26 19:28:37,397 INFO L226 Difference]: Without dead ends: 242 [2020-10-26 19:28:37,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:28:37,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-26 19:28:37,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-10-26 19:28:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-26 19:28:37,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 249 transitions. [2020-10-26 19:28:37,407 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 249 transitions. Word has length 230 [2020-10-26 19:28:37,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:37,407 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 249 transitions. [2020-10-26 19:28:37,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:28:37,407 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 249 transitions. [2020-10-26 19:28:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-26 19:28:37,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:37,409 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:37,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:28:37,409 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:37,410 INFO L82 PathProgramCache]: Analyzing trace with hash -555895194, now seen corresponding path program 30 times [2020-10-26 19:28:37,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:37,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333685988] [2020-10-26 19:28:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:37,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:37,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:37,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:38,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:39,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:42,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:42,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-26 19:28:42,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:42,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:28:42,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:42,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:28:42,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:42,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:28:42,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:43,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:43,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:43,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:43,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:43,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:43,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:43,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:43,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:43,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:43,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:43,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3255 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2790 trivial. 0 not checked. [2020-10-26 19:28:43,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333685988] [2020-10-26 19:28:43,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:43,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:28:43,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375973252] [2020-10-26 19:28:43,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:28:43,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:43,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:28:43,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:28:43,968 INFO L87 Difference]: Start difference. First operand 242 states and 249 transitions. Second operand 34 states. [2020-10-26 19:28:45,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:45,214 INFO L93 Difference]: Finished difference Result 454 states and 474 transitions. [2020-10-26 19:28:45,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:28:45,215 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 237 [2020-10-26 19:28:45,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:45,217 INFO L225 Difference]: With dead ends: 454 [2020-10-26 19:28:45,217 INFO L226 Difference]: Without dead ends: 249 [2020-10-26 19:28:45,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:28:45,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-26 19:28:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2020-10-26 19:28:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-26 19:28:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 256 transitions. [2020-10-26 19:28:45,228 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 256 transitions. Word has length 237 [2020-10-26 19:28:45,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:45,229 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 256 transitions. [2020-10-26 19:28:45,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:28:45,229 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 256 transitions. [2020-10-26 19:28:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-26 19:28:45,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:45,231 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:45,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:28:45,231 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:45,232 INFO L82 PathProgramCache]: Analyzing trace with hash 776880145, now seen corresponding path program 31 times [2020-10-26 19:28:45,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:45,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011876611] [2020-10-26 19:28:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:45,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:45,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:45,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:46,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:48,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:50,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:50,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-26 19:28:50,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:50,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:28:50,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:50,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:28:50,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:50,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:28:50,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:51,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:51,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:51,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:51,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:51,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:51,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:51,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:51,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:51,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:51,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:51,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3472 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 2976 trivial. 0 not checked. [2020-10-26 19:28:51,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011876611] [2020-10-26 19:28:51,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:51,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:28:51,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622752392] [2020-10-26 19:28:51,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:28:51,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:51,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:28:51,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:28:51,876 INFO L87 Difference]: Start difference. First operand 249 states and 256 transitions. Second operand 35 states. [2020-10-26 19:28:52,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:52,985 INFO L93 Difference]: Finished difference Result 467 states and 487 transitions. [2020-10-26 19:28:52,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:28:52,985 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 244 [2020-10-26 19:28:52,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:52,988 INFO L225 Difference]: With dead ends: 467 [2020-10-26 19:28:52,988 INFO L226 Difference]: Without dead ends: 256 [2020-10-26 19:28:52,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:28:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-26 19:28:52,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2020-10-26 19:28:52,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-26 19:28:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 263 transitions. [2020-10-26 19:28:52,997 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 263 transitions. Word has length 244 [2020-10-26 19:28:52,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:52,997 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 263 transitions. [2020-10-26 19:28:52,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:28:52,998 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 263 transitions. [2020-10-26 19:28:52,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-26 19:28:52,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:52,999 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:52,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:28:52,999 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:53,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:53,000 INFO L82 PathProgramCache]: Analyzing trace with hash 200671238, now seen corresponding path program 32 times [2020-10-26 19:28:53,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:53,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306492052] [2020-10-26 19:28:53,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:53,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:53,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:53,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:53,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:55,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:58,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:58,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-26 19:28:58,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:58,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:28:58,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:58,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:28:58,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:58,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:28:58,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:59,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:59,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:59,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:59,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:59,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:59,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:59,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:59,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:59,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:59,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:59,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3696 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3168 trivial. 0 not checked. [2020-10-26 19:28:59,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306492052] [2020-10-26 19:28:59,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:59,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:28:59,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818726232] [2020-10-26 19:28:59,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:28:59,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:59,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:28:59,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:28:59,669 INFO L87 Difference]: Start difference. First operand 256 states and 263 transitions. Second operand 36 states. [2020-10-26 19:29:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:01,011 INFO L93 Difference]: Finished difference Result 480 states and 500 transitions. [2020-10-26 19:29:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:29:01,012 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 251 [2020-10-26 19:29:01,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:01,014 INFO L225 Difference]: With dead ends: 480 [2020-10-26 19:29:01,015 INFO L226 Difference]: Without dead ends: 263 [2020-10-26 19:29:01,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:29:01,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-26 19:29:01,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2020-10-26 19:29:01,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-26 19:29:01,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 270 transitions. [2020-10-26 19:29:01,024 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 270 transitions. Word has length 251 [2020-10-26 19:29:01,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:01,024 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 270 transitions. [2020-10-26 19:29:01,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:29:01,024 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 270 transitions. [2020-10-26 19:29:01,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-26 19:29:01,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:01,026 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:01,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:29:01,026 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:01,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:01,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1507868815, now seen corresponding path program 33 times [2020-10-26 19:29:01,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:01,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773979330] [2020-10-26 19:29:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:01,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:01,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:01,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:01,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:04,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:06,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:06,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-26 19:29:06,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:06,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-26 19:29:06,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:06,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:29:06,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:06,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:29:06,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:07,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:07,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:07,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:07,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:07,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:07,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:07,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:07,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:07,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:07,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:07,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3366 trivial. 0 not checked. [2020-10-26 19:29:07,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773979330] [2020-10-26 19:29:07,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:07,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:29:07,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204472298] [2020-10-26 19:29:07,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:29:07,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:07,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:29:07,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:29:07,788 INFO L87 Difference]: Start difference. First operand 263 states and 270 transitions. Second operand 37 states. [2020-10-26 19:29:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:09,210 INFO L93 Difference]: Finished difference Result 493 states and 513 transitions. [2020-10-26 19:29:09,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:29:09,211 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 258 [2020-10-26 19:29:09,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:09,213 INFO L225 Difference]: With dead ends: 493 [2020-10-26 19:29:09,213 INFO L226 Difference]: Without dead ends: 270 [2020-10-26 19:29:09,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:29:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-26 19:29:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2020-10-26 19:29:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-26 19:29:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 277 transitions. [2020-10-26 19:29:09,224 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 277 transitions. Word has length 258 [2020-10-26 19:29:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:09,224 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 277 transitions. [2020-10-26 19:29:09,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:29:09,224 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 277 transitions. [2020-10-26 19:29:09,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-26 19:29:09,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:09,226 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:09,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:29:09,226 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:09,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:09,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1735446106, now seen corresponding path program 34 times [2020-10-26 19:29:09,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:09,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103951385] [2020-10-26 19:29:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:09,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:09,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:09,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:10,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:12,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:14,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:14,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 19:29:14,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:14,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-26 19:29:14,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:14,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:29:14,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:14,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:29:14,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:16,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:16,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:16,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:16,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:16,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:16,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:16,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:16,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4165 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3570 trivial. 0 not checked. [2020-10-26 19:29:16,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103951385] [2020-10-26 19:29:16,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:16,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:29:16,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316573164] [2020-10-26 19:29:16,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:29:16,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:16,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:29:16,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:29:16,142 INFO L87 Difference]: Start difference. First operand 270 states and 277 transitions. Second operand 38 states. [2020-10-26 19:29:17,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:17,622 INFO L93 Difference]: Finished difference Result 506 states and 526 transitions. [2020-10-26 19:29:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:29:17,623 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 265 [2020-10-26 19:29:17,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:17,625 INFO L225 Difference]: With dead ends: 506 [2020-10-26 19:29:17,626 INFO L226 Difference]: Without dead ends: 277 [2020-10-26 19:29:17,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:29:17,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-26 19:29:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2020-10-26 19:29:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-26 19:29:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 284 transitions. [2020-10-26 19:29:17,636 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 284 transitions. Word has length 265 [2020-10-26 19:29:17,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:17,637 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 284 transitions. [2020-10-26 19:29:17,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:29:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 284 transitions. [2020-10-26 19:29:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-26 19:29:17,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:17,639 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:17,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:29:17,639 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:17,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:17,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1181559087, now seen corresponding path program 35 times [2020-10-26 19:29:17,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:17,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075126483] [2020-10-26 19:29:17,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:17,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:18,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:18,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:18,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:21,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:22,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:22,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-26 19:29:22,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:22,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 19:29:22,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:22,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:29:22,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:22,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:29:22,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:24,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:24,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:24,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:24,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:24,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:24,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:29:24,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:24,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:24,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:24,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:24,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3780 trivial. 0 not checked. [2020-10-26 19:29:24,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075126483] [2020-10-26 19:29:24,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:24,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:29:24,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393638442] [2020-10-26 19:29:24,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:29:24,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:24,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:29:24,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:29:24,685 INFO L87 Difference]: Start difference. First operand 277 states and 284 transitions. Second operand 39 states. [2020-10-26 19:29:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:25,921 INFO L93 Difference]: Finished difference Result 519 states and 539 transitions. [2020-10-26 19:29:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:29:25,922 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 272 [2020-10-26 19:29:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:25,923 INFO L225 Difference]: With dead ends: 519 [2020-10-26 19:29:25,923 INFO L226 Difference]: Without dead ends: 284 [2020-10-26 19:29:25,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:29:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-26 19:29:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2020-10-26 19:29:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-26 19:29:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 291 transitions. [2020-10-26 19:29:25,933 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 291 transitions. Word has length 272 [2020-10-26 19:29:25,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:25,933 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 291 transitions. [2020-10-26 19:29:25,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:29:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 291 transitions. [2020-10-26 19:29:25,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-26 19:29:25,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:25,958 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:25,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:29:25,959 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:25,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:25,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1937460038, now seen corresponding path program 36 times [2020-10-26 19:29:25,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:25,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279208466] [2020-10-26 19:29:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:26,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:26,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:26,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:26,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking...