/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:33:33,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:33:33,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:33:33,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:33:33,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:33:33,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:33:33,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:33:33,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:33:33,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:33:33,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:33:33,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:33:33,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:33:33,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:33:33,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:33:33,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:33:33,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:33:33,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:33:33,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:33:33,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:33:33,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:33:33,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:33:33,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:33:33,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:33:33,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:33:33,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:33:33,870 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:33:33,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:33:33,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:33:33,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:33:33,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:33:33,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:33:33,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:33:33,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:33:33,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:33:33,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:33:33,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:33:33,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:33:33,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:33:33,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:33:33,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:33:33,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:33:33,891 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 [2020-10-29 09:33:33,949 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:33:33,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:33:33,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:33:33,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:33:33,955 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:33:33,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:33:33,956 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:33:33,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:33:33,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:33:33,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:33:33,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:33:33,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:33:33,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:33:33,959 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:33:33,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:33:33,959 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:33:33,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:33:33,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:33:33,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:33:33,960 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:33:33,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:33:33,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:33:33,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:33:33,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:33:33,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:33:33,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:33:33,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:33:33,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:33:33,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:33:33,962 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:33:34,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:33:34,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:33:34,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:33:34,402 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:33:34,403 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:33:34,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-10-29 09:33:34,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e438ccdc4/3f73262be2c2455abc21c029723df6ad/FLAGdb13565e1 [2020-10-29 09:33:35,255 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:33:35,255 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-10-29 09:33:35,266 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e438ccdc4/3f73262be2c2455abc21c029723df6ad/FLAGdb13565e1 [2020-10-29 09:33:35,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e438ccdc4/3f73262be2c2455abc21c029723df6ad [2020-10-29 09:33:35,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:33:35,591 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:33:35,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:33:35,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:33:35,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:33:35,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:33:35" (1/1) ... [2020-10-29 09:33:35,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b4f0674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:35, skipping insertion in model container [2020-10-29 09:33:35,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:33:35" (1/1) ... [2020-10-29 09:33:35,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:33:35,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:33:35,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:33:35,822 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:33:35,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:33:35,869 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:33:35,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:35 WrapperNode [2020-10-29 09:33:35,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:33:35,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:33:35,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:33:35,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:33:35,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:35" (1/1) ... [2020-10-29 09:33:35,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:35" (1/1) ... [2020-10-29 09:33:35,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:35" (1/1) ... [2020-10-29 09:33:35,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:35" (1/1) ... [2020-10-29 09:33:35,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:35" (1/1) ... [2020-10-29 09:33:35,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:35" (1/1) ... [2020-10-29 09:33:35,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:35" (1/1) ... [2020-10-29 09:33:35,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:33:35,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:33:35,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:33:35,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:33:35,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:33:36,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:33:36,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:33:36,014 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:33:36,014 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:33:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:33:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:33:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:33:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:33:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:33:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:33:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:33:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:33:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:33:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:33:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:33:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:33:36,565 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:33:36,565 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:33:36,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:33:36 BoogieIcfgContainer [2020-10-29 09:33:36,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:33:36,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:33:36,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:33:36,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:33:36,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:33:35" (1/3) ... [2020-10-29 09:33:36,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291cad63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:33:36, skipping insertion in model container [2020-10-29 09:33:36,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:35" (2/3) ... [2020-10-29 09:33:36,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291cad63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:33:36, skipping insertion in model container [2020-10-29 09:33:36,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:33:36" (3/3) ... [2020-10-29 09:33:36,579 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-10-29 09:33:36,594 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:33:36,606 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:33:36,630 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:33:36,679 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:33:36,679 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:33:36,701 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:33:36,701 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:33:36,702 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:33:36,702 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:33:36,702 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:33:36,702 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:33:36,729 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-10-29 09:33:36,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:33:36,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:36,741 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] [2020-10-29 09:33:36,742 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:36,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:36,754 INFO L82 PathProgramCache]: Analyzing trace with hash 270724770, now seen corresponding path program 1 times [2020-10-29 09:33:36,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:36,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976464209] [2020-10-29 09:33:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:37,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:37,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:37,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:33:37,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:37,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-29 09:33:37,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:37,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:37,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:37,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:33:37,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:33:37,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:33:37,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:37,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:37,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:37,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:37,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:37,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:33:37,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:37,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:37,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:37,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:37,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:37,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:37,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976464209] [2020-10-29 09:33:37,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:37,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:37,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902397960] [2020-10-29 09:33:37,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:37,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:37,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:37,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:37,495 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 4 states. [2020-10-29 09:33:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:37,811 INFO L93 Difference]: Finished difference Result 86 states and 145 transitions. [2020-10-29 09:33:37,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:37,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-29 09:33:37,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:37,826 INFO L225 Difference]: With dead ends: 86 [2020-10-29 09:33:37,827 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:33:37,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:37,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:33:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2020-10-29 09:33:37,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:33:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 83 transitions. [2020-10-29 09:33:37,887 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 83 transitions. Word has length 21 [2020-10-29 09:33:37,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:37,888 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 83 transitions. [2020-10-29 09:33:37,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 83 transitions. [2020-10-29 09:33:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:33:37,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:37,890 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] [2020-10-29 09:33:37,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:33:37,891 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:37,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:37,892 INFO L82 PathProgramCache]: Analyzing trace with hash -316081244, now seen corresponding path program 1 times [2020-10-29 09:33:37,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:37,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696334322] [2020-10-29 09:33:37,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:37,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:38,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:38,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:33:38,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:38,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-29 09:33:38,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:38,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:38,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:38,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:33:38,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:33:38,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:38,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:38,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:38,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:38,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:38,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:38,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:33:38,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:38,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:38,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:38,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:38,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:38,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:38,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696334322] [2020-10-29 09:33:38,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:38,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:38,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895175196] [2020-10-29 09:33:38,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:38,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:38,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:38,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:38,186 INFO L87 Difference]: Start difference. First operand 48 states and 83 transitions. Second operand 4 states. [2020-10-29 09:33:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:38,461 INFO L93 Difference]: Finished difference Result 109 states and 195 transitions. [2020-10-29 09:33:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:38,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-29 09:33:38,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:38,465 INFO L225 Difference]: With dead ends: 109 [2020-10-29 09:33:38,465 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:33:38,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:38,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:33:38,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-29 09:33:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 09:33:38,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 115 transitions. [2020-10-29 09:33:38,487 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 115 transitions. Word has length 21 [2020-10-29 09:33:38,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:38,487 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 115 transitions. [2020-10-29 09:33:38,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:38,488 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 115 transitions. [2020-10-29 09:33:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:33:38,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:38,489 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] [2020-10-29 09:33:38,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:33:38,490 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:38,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:38,490 INFO L82 PathProgramCache]: Analyzing trace with hash -190848284, now seen corresponding path program 1 times [2020-10-29 09:33:38,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:38,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402325656] [2020-10-29 09:33:38,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:38,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:38,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:38,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:38,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:33:38,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:38,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-29 09:33:38,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:38,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:38,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:38,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:33:38,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:33:38,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:38,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:38,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:38,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:38,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:38,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:38,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:33:38,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:38,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:38,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:38,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:38,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:38,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:38,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402325656] [2020-10-29 09:33:38,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:38,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:38,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991078360] [2020-10-29 09:33:38,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:38,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:38,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:38,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:38,809 INFO L87 Difference]: Start difference. First operand 66 states and 115 transitions. Second operand 4 states. [2020-10-29 09:33:38,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:38,988 INFO L93 Difference]: Finished difference Result 182 states and 328 transitions. [2020-10-29 09:33:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:38,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-29 09:33:38,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:38,991 INFO L225 Difference]: With dead ends: 182 [2020-10-29 09:33:38,991 INFO L226 Difference]: Without dead ends: 122 [2020-10-29 09:33:38,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:38,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-29 09:33:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-29 09:33:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-29 09:33:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 214 transitions. [2020-10-29 09:33:39,008 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 214 transitions. Word has length 22 [2020-10-29 09:33:39,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:39,008 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 214 transitions. [2020-10-29 09:33:39,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 214 transitions. [2020-10-29 09:33:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:33:39,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:39,010 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] [2020-10-29 09:33:39,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:33:39,010 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:39,011 INFO L82 PathProgramCache]: Analyzing trace with hash 395957730, now seen corresponding path program 1 times [2020-10-29 09:33:39,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:39,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242152030] [2020-10-29 09:33:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:39,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:39,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:39,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:39,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:33:39,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:39,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-29 09:33:39,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:39,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:39,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:39,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:33:39,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:33:39,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:39,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:39,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:39,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:39,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:39,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:39,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:39,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:39,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:39,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:39,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:39,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:39,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:39,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242152030] [2020-10-29 09:33:39,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:39,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:39,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167921487] [2020-10-29 09:33:39,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:39,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:39,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:39,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:39,203 INFO L87 Difference]: Start difference. First operand 121 states and 214 transitions. Second operand 4 states. [2020-10-29 09:33:39,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:39,383 INFO L93 Difference]: Finished difference Result 157 states and 277 transitions. [2020-10-29 09:33:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:39,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-29 09:33:39,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:39,386 INFO L225 Difference]: With dead ends: 157 [2020-10-29 09:33:39,386 INFO L226 Difference]: Without dead ends: 154 [2020-10-29 09:33:39,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:39,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-29 09:33:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 121. [2020-10-29 09:33:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-29 09:33:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 212 transitions. [2020-10-29 09:33:39,401 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 212 transitions. Word has length 22 [2020-10-29 09:33:39,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:39,402 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 212 transitions. [2020-10-29 09:33:39,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 212 transitions. [2020-10-29 09:33:39,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:33:39,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:39,403 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] [2020-10-29 09:33:39,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:33:39,403 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:39,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1614700499, now seen corresponding path program 1 times [2020-10-29 09:33:39,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:39,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962490587] [2020-10-29 09:33:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:39,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:39,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:39,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:39,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:33:39,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:39,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-29 09:33:39,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:39,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:39,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:39,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:33:39,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:33:39,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:39,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:39,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:39,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:39,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:39,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:39,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:33:39,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:39,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:39,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:39,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:39,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:39,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:39,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962490587] [2020-10-29 09:33:39,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:39,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:39,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959865310] [2020-10-29 09:33:39,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:39,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:39,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:39,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:39,642 INFO L87 Difference]: Start difference. First operand 121 states and 212 transitions. Second operand 4 states. [2020-10-29 09:33:39,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:39,797 INFO L93 Difference]: Finished difference Result 225 states and 399 transitions. [2020-10-29 09:33:39,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:39,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-29 09:33:39,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:39,800 INFO L225 Difference]: With dead ends: 225 [2020-10-29 09:33:39,800 INFO L226 Difference]: Without dead ends: 222 [2020-10-29 09:33:39,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:39,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-29 09:33:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 165. [2020-10-29 09:33:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-29 09:33:39,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 288 transitions. [2020-10-29 09:33:39,816 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 288 transitions. Word has length 23 [2020-10-29 09:33:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:39,817 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 288 transitions. [2020-10-29 09:33:39,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 288 transitions. [2020-10-29 09:33:39,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:33:39,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:39,819 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] [2020-10-29 09:33:39,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:33:39,819 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:39,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:39,820 INFO L82 PathProgramCache]: Analyzing trace with hash 2093460783, now seen corresponding path program 1 times [2020-10-29 09:33:39,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:39,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722097308] [2020-10-29 09:33:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:39,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:39,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:39,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:39,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:33:39,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:39,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-29 09:33:39,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:39,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:39,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:39,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:33:39,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:33:39,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:39,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:39,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:39,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:39,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:39,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:39,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:39,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:39,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:39,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:39,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:39,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:39,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:33:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:40,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722097308] [2020-10-29 09:33:40,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:40,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:40,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753387890] [2020-10-29 09:33:40,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:40,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:40,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:40,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:40,006 INFO L87 Difference]: Start difference. First operand 165 states and 288 transitions. Second operand 4 states. [2020-10-29 09:33:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:40,374 INFO L93 Difference]: Finished difference Result 389 states and 687 transitions. [2020-10-29 09:33:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:40,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-29 09:33:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:40,377 INFO L225 Difference]: With dead ends: 389 [2020-10-29 09:33:40,377 INFO L226 Difference]: Without dead ends: 230 [2020-10-29 09:33:40,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:40,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-29 09:33:40,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2020-10-29 09:33:40,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-29 09:33:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 396 transitions. [2020-10-29 09:33:40,395 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 396 transitions. Word has length 23 [2020-10-29 09:33:40,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:40,395 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 396 transitions. [2020-10-29 09:33:40,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 396 transitions. [2020-10-29 09:33:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:33:40,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:40,398 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] [2020-10-29 09:33:40,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:33:40,398 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:40,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:40,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1490531663, now seen corresponding path program 1 times [2020-10-29 09:33:40,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:40,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284007741] [2020-10-29 09:33:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:40,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:40,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:40,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:40,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:40,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:33:40,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:40,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-29 09:33:40,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:40,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:40,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:40,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:33:40,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:33:40,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:40,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:40,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:40,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:40,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:40,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:40,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:33:40,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:40,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:40,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:40,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284007741] [2020-10-29 09:33:40,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:40,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:40,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561012413] [2020-10-29 09:33:40,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:40,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:40,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:40,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:40,686 INFO L87 Difference]: Start difference. First operand 229 states and 396 transitions. Second operand 4 states. [2020-10-29 09:33:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:40,885 INFO L93 Difference]: Finished difference Result 344 states and 591 transitions. [2020-10-29 09:33:40,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:40,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-29 09:33:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:40,888 INFO L225 Difference]: With dead ends: 344 [2020-10-29 09:33:40,888 INFO L226 Difference]: Without dead ends: 233 [2020-10-29 09:33:40,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:40,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-29 09:33:40,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-10-29 09:33:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-29 09:33:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 392 transitions. [2020-10-29 09:33:40,919 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 392 transitions. Word has length 24 [2020-10-29 09:33:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:40,920 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 392 transitions. [2020-10-29 09:33:40,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 392 transitions. [2020-10-29 09:33:40,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:33:40,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:40,926 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] [2020-10-29 09:33:40,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:33:40,930 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:40,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:40,931 INFO L82 PathProgramCache]: Analyzing trace with hash 469463309, now seen corresponding path program 1 times [2020-10-29 09:33:40,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:40,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144363585] [2020-10-29 09:33:40,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:40,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:40,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:41,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:41,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:33:41,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:41,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-29 09:33:41,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:41,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:41,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:41,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:33:41,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:33:41,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:41,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:41,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:41,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:41,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:41,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:41,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:41,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:41,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:41,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:41,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:41,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:41,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:41,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144363585] [2020-10-29 09:33:41,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:41,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:41,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157077131] [2020-10-29 09:33:41,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:41,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:41,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:41,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:41,148 INFO L87 Difference]: Start difference. First operand 232 states and 392 transitions. Second operand 4 states. [2020-10-29 09:33:41,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:41,324 INFO L93 Difference]: Finished difference Result 350 states and 591 transitions. [2020-10-29 09:33:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:41,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-29 09:33:41,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:41,327 INFO L225 Difference]: With dead ends: 350 [2020-10-29 09:33:41,327 INFO L226 Difference]: Without dead ends: 239 [2020-10-29 09:33:41,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-29 09:33:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2020-10-29 09:33:41,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-29 09:33:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 396 transitions. [2020-10-29 09:33:41,339 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 396 transitions. Word has length 24 [2020-10-29 09:33:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:41,340 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 396 transitions. [2020-10-29 09:33:41,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 396 transitions. [2020-10-29 09:33:41,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:33:41,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:41,341 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] [2020-10-29 09:33:41,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:33:41,341 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:41,342 INFO L82 PathProgramCache]: Analyzing trace with hash -541653941, now seen corresponding path program 1 times [2020-10-29 09:33:41,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:41,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873498648] [2020-10-29 09:33:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:41,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:41,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:41,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:33:41,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:41,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-29 09:33:41,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:41,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:41,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:41,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:33:41,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:33:41,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:41,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:41,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:41,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:41,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:41,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:41,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:33:41,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:41,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:41,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:41,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873498648] [2020-10-29 09:33:41,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:41,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:41,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046266627] [2020-10-29 09:33:41,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:41,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:41,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:41,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:41,453 INFO L87 Difference]: Start difference. First operand 238 states and 396 transitions. Second operand 4 states. [2020-10-29 09:33:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:41,624 INFO L93 Difference]: Finished difference Result 430 states and 727 transitions. [2020-10-29 09:33:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:41,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-29 09:33:41,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:41,628 INFO L225 Difference]: With dead ends: 430 [2020-10-29 09:33:41,628 INFO L226 Difference]: Without dead ends: 427 [2020-10-29 09:33:41,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:41,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-29 09:33:41,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 330. [2020-10-29 09:33:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-29 09:33:41,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 540 transitions. [2020-10-29 09:33:41,644 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 540 transitions. Word has length 24 [2020-10-29 09:33:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:41,644 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 540 transitions. [2020-10-29 09:33:41,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:41,644 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 540 transitions. [2020-10-29 09:33:41,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:33:41,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:41,645 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] [2020-10-29 09:33:41,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:33:41,646 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:41,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:41,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1128459955, now seen corresponding path program 1 times [2020-10-29 09:33:41,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:41,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360119304] [2020-10-29 09:33:41,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:41,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:41,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:41,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:33:41,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:41,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-29 09:33:41,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:41,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:41,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:41,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:33:41,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:33:41,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:41,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:41,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:41,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:41,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:41,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:41,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:33:41,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:41,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:41,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:41,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:41,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:41,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360119304] [2020-10-29 09:33:41,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:41,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:41,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054718507] [2020-10-29 09:33:41,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:41,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:41,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:41,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:41,790 INFO L87 Difference]: Start difference. First operand 330 states and 540 transitions. Second operand 4 states. [2020-10-29 09:33:41,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:41,977 INFO L93 Difference]: Finished difference Result 766 states and 1263 transitions. [2020-10-29 09:33:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:41,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-29 09:33:41,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:41,981 INFO L225 Difference]: With dead ends: 766 [2020-10-29 09:33:41,981 INFO L226 Difference]: Without dead ends: 451 [2020-10-29 09:33:41,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-10-29 09:33:42,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 450. [2020-10-29 09:33:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-29 09:33:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 728 transitions. [2020-10-29 09:33:42,006 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 728 transitions. Word has length 24 [2020-10-29 09:33:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:42,007 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 728 transitions. [2020-10-29 09:33:42,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 728 transitions. [2020-10-29 09:33:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:33:42,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:42,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:42,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:33:42,008 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash 395247164, now seen corresponding path program 1 times [2020-10-29 09:33:42,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:42,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42467351] [2020-10-29 09:33:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:42,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:42,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:42,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:42,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:33:42,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:42,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-29 09:33:42,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:42,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:42,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:42,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:33:42,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:33:42,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:42,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:42,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:42,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:42,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:42,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:42,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:42,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:42,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:42,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:42,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:42,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42467351] [2020-10-29 09:33:42,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:42,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:42,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431068268] [2020-10-29 09:33:42,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:42,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:42,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:42,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:42,170 INFO L87 Difference]: Start difference. First operand 450 states and 728 transitions. Second operand 4 states. [2020-10-29 09:33:42,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:42,347 INFO L93 Difference]: Finished difference Result 806 states and 1323 transitions. [2020-10-29 09:33:42,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:42,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-29 09:33:42,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:42,354 INFO L225 Difference]: With dead ends: 806 [2020-10-29 09:33:42,355 INFO L226 Difference]: Without dead ends: 803 [2020-10-29 09:33:42,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:42,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2020-10-29 09:33:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 642. [2020-10-29 09:33:42,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-10-29 09:33:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1016 transitions. [2020-10-29 09:33:42,385 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1016 transitions. Word has length 25 [2020-10-29 09:33:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:42,385 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 1016 transitions. [2020-10-29 09:33:42,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1016 transitions. [2020-10-29 09:33:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:33:42,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:42,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:42,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:33:42,390 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:42,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:42,390 INFO L82 PathProgramCache]: Analyzing trace with hash -191558850, now seen corresponding path program 1 times [2020-10-29 09:33:42,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:42,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520095777] [2020-10-29 09:33:42,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:42,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:42,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:42,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:42,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:33:42,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:42,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-29 09:33:42,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:42,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:42,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:42,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:33:42,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:33:42,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:42,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:42,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:42,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:42,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:42,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:42,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:42,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:42,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:42,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:42,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:42,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:42,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 22 [2020-10-29 09:33:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:42,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520095777] [2020-10-29 09:33:42,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:42,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:42,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296679506] [2020-10-29 09:33:42,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:42,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:42,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:42,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:42,590 INFO L87 Difference]: Start difference. First operand 642 states and 1016 transitions. Second operand 4 states. [2020-10-29 09:33:42,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:42,761 INFO L93 Difference]: Finished difference Result 1494 states and 2379 transitions. [2020-10-29 09:33:42,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:42,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-29 09:33:42,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:42,766 INFO L225 Difference]: With dead ends: 1494 [2020-10-29 09:33:42,767 INFO L226 Difference]: Without dead ends: 867 [2020-10-29 09:33:42,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:42,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2020-10-29 09:33:42,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 866. [2020-10-29 09:33:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 866 states. [2020-10-29 09:33:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1352 transitions. [2020-10-29 09:33:42,805 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1352 transitions. Word has length 25 [2020-10-29 09:33:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:42,805 INFO L481 AbstractCegarLoop]: Abstraction has 866 states and 1352 transitions. [2020-10-29 09:33:42,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1352 transitions. [2020-10-29 09:33:42,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:33:42,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:42,807 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] [2020-10-29 09:33:42,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:33:42,808 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:42,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:42,808 INFO L82 PathProgramCache]: Analyzing trace with hash -625579082, now seen corresponding path program 1 times [2020-10-29 09:33:42,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:42,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983837974] [2020-10-29 09:33:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:42,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:42,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:42,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:42,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:42,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:33:42,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:42,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-29 09:33:42,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:42,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:42,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:42,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:33:42,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:33:42,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:43,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:43,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:43,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:43,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:43,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:43,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:33:43,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:43,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:43,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:43,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:43,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:43,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:43,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983837974] [2020-10-29 09:33:43,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:43,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:43,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089052543] [2020-10-29 09:33:43,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:43,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:43,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:43,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:43,045 INFO L87 Difference]: Start difference. First operand 866 states and 1352 transitions. Second operand 4 states. [2020-10-29 09:33:43,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:43,223 INFO L93 Difference]: Finished difference Result 1294 states and 2011 transitions. [2020-10-29 09:33:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:43,224 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-29 09:33:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:43,229 INFO L225 Difference]: With dead ends: 1294 [2020-10-29 09:33:43,229 INFO L226 Difference]: Without dead ends: 875 [2020-10-29 09:33:43,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:43,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2020-10-29 09:33:43,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 874. [2020-10-29 09:33:43,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-10-29 09:33:43,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1336 transitions. [2020-10-29 09:33:43,275 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1336 transitions. Word has length 26 [2020-10-29 09:33:43,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:43,275 INFO L481 AbstractCegarLoop]: Abstraction has 874 states and 1336 transitions. [2020-10-29 09:33:43,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:43,276 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1336 transitions. [2020-10-29 09:33:43,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:33:43,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:43,277 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] [2020-10-29 09:33:43,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:33:43,278 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:43,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:43,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1905442760, now seen corresponding path program 1 times [2020-10-29 09:33:43,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:43,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327327302] [2020-10-29 09:33:43,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:43,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:43,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:43,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:43,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:33:43,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:43,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-29 09:33:43,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:43,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:43,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:43,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:33:43,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:33:43,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:43,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:43,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:43,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:43,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:43,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:43,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:43,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:43,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:43,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:43,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:43,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:43,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:43,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327327302] [2020-10-29 09:33:43,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:43,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:43,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561941397] [2020-10-29 09:33:43,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:43,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:43,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:43,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:43,462 INFO L87 Difference]: Start difference. First operand 874 states and 1336 transitions. Second operand 4 states. [2020-10-29 09:33:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:43,649 INFO L93 Difference]: Finished difference Result 1534 states and 2379 transitions. [2020-10-29 09:33:43,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:43,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-29 09:33:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:43,658 INFO L225 Difference]: With dead ends: 1534 [2020-10-29 09:33:43,659 INFO L226 Difference]: Without dead ends: 1531 [2020-10-29 09:33:43,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:43,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2020-10-29 09:33:43,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1274. [2020-10-29 09:33:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2020-10-29 09:33:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1896 transitions. [2020-10-29 09:33:43,712 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1896 transitions. Word has length 26 [2020-10-29 09:33:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:43,713 INFO L481 AbstractCegarLoop]: Abstraction has 1274 states and 1896 transitions. [2020-10-29 09:33:43,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1896 transitions. [2020-10-29 09:33:43,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:33:43,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:43,716 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] [2020-10-29 09:33:43,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:33:43,716 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:43,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:43,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1802718522, now seen corresponding path program 1 times [2020-10-29 09:33:43,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:43,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211932463] [2020-10-29 09:33:43,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:43,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:43,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:43,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:43,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:33:43,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:43,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-29 09:33:43,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:43,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:43,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:43,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:33:43,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:33:43,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:43,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:43,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:43,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:43,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:43,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:43,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:43,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:43,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:43,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:43,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:43,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:43,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:43,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211932463] [2020-10-29 09:33:43,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:43,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:43,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045336532] [2020-10-29 09:33:43,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:43,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:43,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:43,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:43,852 INFO L87 Difference]: Start difference. First operand 1274 states and 1896 transitions. Second operand 4 states. [2020-10-29 09:33:44,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:44,063 INFO L93 Difference]: Finished difference Result 2942 states and 4395 transitions. [2020-10-29 09:33:44,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:44,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-29 09:33:44,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:44,072 INFO L225 Difference]: With dead ends: 2942 [2020-10-29 09:33:44,072 INFO L226 Difference]: Without dead ends: 1691 [2020-10-29 09:33:44,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2020-10-29 09:33:44,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1690. [2020-10-29 09:33:44,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-10-29 09:33:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2472 transitions. [2020-10-29 09:33:44,175 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2472 transitions. Word has length 26 [2020-10-29 09:33:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:44,175 INFO L481 AbstractCegarLoop]: Abstraction has 1690 states and 2472 transitions. [2020-10-29 09:33:44,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:44,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2472 transitions. [2020-10-29 09:33:44,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:33:44,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:44,178 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] [2020-10-29 09:33:44,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:33:44,179 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:44,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:44,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1067487877, now seen corresponding path program 1 times [2020-10-29 09:33:44,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:44,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254444978] [2020-10-29 09:33:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:44,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:44,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:44,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:44,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:44,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:33:44,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:44,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-29 09:33:44,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:44,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:44,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:44,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:33:44,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:33:44,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:44,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:44,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:44,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:44,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:44,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:44,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:44,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:44,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:44,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:44,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:44,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:44,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:44,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254444978] [2020-10-29 09:33:44,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:44,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:44,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867764732] [2020-10-29 09:33:44,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:44,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:44,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:44,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:44,431 INFO L87 Difference]: Start difference. First operand 1690 states and 2472 transitions. Second operand 4 states. [2020-10-29 09:33:44,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:44,652 INFO L93 Difference]: Finished difference Result 2910 states and 4299 transitions. [2020-10-29 09:33:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:44,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-29 09:33:44,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:44,667 INFO L225 Difference]: With dead ends: 2910 [2020-10-29 09:33:44,668 INFO L226 Difference]: Without dead ends: 2907 [2020-10-29 09:33:44,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:44,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2907 states. [2020-10-29 09:33:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2907 to 2522. [2020-10-29 09:33:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2522 states. [2020-10-29 09:33:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 3592 transitions. [2020-10-29 09:33:44,816 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 3592 transitions. Word has length 27 [2020-10-29 09:33:44,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:44,817 INFO L481 AbstractCegarLoop]: Abstraction has 2522 states and 3592 transitions. [2020-10-29 09:33:44,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:44,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 3592 transitions. [2020-10-29 09:33:44,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:33:44,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:44,822 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] [2020-10-29 09:33:44,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:33:44,823 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:44,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:44,824 INFO L82 PathProgramCache]: Analyzing trace with hash 480681863, now seen corresponding path program 1 times [2020-10-29 09:33:44,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:44,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397436531] [2020-10-29 09:33:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:44,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:44,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:44,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:45,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:45,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:33:45,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:45,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-29 09:33:45,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:45,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:45,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:45,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:33:45,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:33:45,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:45,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:45,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:45,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:45,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:45,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:45,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:45,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:45,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:45,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:45,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:45,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:45,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:45,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397436531] [2020-10-29 09:33:45,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:45,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:45,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273826810] [2020-10-29 09:33:45,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:45,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:45,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:45,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:45,102 INFO L87 Difference]: Start difference. First operand 2522 states and 3592 transitions. Second operand 4 states. [2020-10-29 09:33:45,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:45,348 INFO L93 Difference]: Finished difference Result 5790 states and 8267 transitions. [2020-10-29 09:33:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:45,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-29 09:33:45,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:45,365 INFO L225 Difference]: With dead ends: 5790 [2020-10-29 09:33:45,365 INFO L226 Difference]: Without dead ends: 3291 [2020-10-29 09:33:45,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2020-10-29 09:33:45,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 3290. [2020-10-29 09:33:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3290 states. [2020-10-29 09:33:45,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 4584 transitions. [2020-10-29 09:33:45,514 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 4584 transitions. Word has length 27 [2020-10-29 09:33:45,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:45,515 INFO L481 AbstractCegarLoop]: Abstraction has 3290 states and 4584 transitions. [2020-10-29 09:33:45,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 4584 transitions. [2020-10-29 09:33:45,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:33:45,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:45,519 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] [2020-10-29 09:33:45,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:33:45,520 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:45,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:45,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1260932317, now seen corresponding path program 1 times [2020-10-29 09:33:45,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:45,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564652272] [2020-10-29 09:33:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:45,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:45,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:45,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:45,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:45,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:45,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:33:45,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:33:45,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-29 09:33:45,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:45,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:45,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:45,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:33:45,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:33:45,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:45,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:45,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:45,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:45,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:45,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:45,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:45,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:45,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:45,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:45,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:45,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:45,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:45,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564652272] [2020-10-29 09:33:45,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:45,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:45,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904161228] [2020-10-29 09:33:45,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:45,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:45,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:45,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:45,903 INFO L87 Difference]: Start difference. First operand 3290 states and 4584 transitions. Second operand 4 states. [2020-10-29 09:33:46,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:46,136 INFO L93 Difference]: Finished difference Result 4942 states and 6859 transitions. [2020-10-29 09:33:46,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:46,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-29 09:33:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:46,154 INFO L225 Difference]: With dead ends: 4942 [2020-10-29 09:33:46,154 INFO L226 Difference]: Without dead ends: 3339 [2020-10-29 09:33:46,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:46,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2020-10-29 09:33:46,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3338. [2020-10-29 09:33:46,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3338 states. [2020-10-29 09:33:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 4552 transitions. [2020-10-29 09:33:46,299 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 4552 transitions. Word has length 28 [2020-10-29 09:33:46,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:46,300 INFO L481 AbstractCegarLoop]: Abstraction has 3338 states and 4552 transitions. [2020-10-29 09:33:46,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:46,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 4552 transitions. [2020-10-29 09:33:46,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:33:46,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:46,304 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] [2020-10-29 09:33:46,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:33:46,304 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:46,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:46,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1754171301, now seen corresponding path program 1 times [2020-10-29 09:33:46,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:46,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426840618] [2020-10-29 09:33:46,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:46,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:46,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:46,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:46,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:46,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:33:46,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:46,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-29 09:33:46,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:46,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:33:46,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:33:46,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:46,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:46,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:46,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:46,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:46,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:46,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:46,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:46,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:46,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:46,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:46,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:46,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:46,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426840618] [2020-10-29 09:33:46,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:46,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:46,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758346585] [2020-10-29 09:33:46,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:46,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:46,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:46,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:46,515 INFO L87 Difference]: Start difference. First operand 3338 states and 4552 transitions. Second operand 4 states. [2020-10-29 09:33:46,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:46,751 INFO L93 Difference]: Finished difference Result 5006 states and 6795 transitions. [2020-10-29 09:33:46,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:46,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-29 09:33:46,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:46,770 INFO L225 Difference]: With dead ends: 5006 [2020-10-29 09:33:46,771 INFO L226 Difference]: Without dead ends: 3403 [2020-10-29 09:33:46,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:46,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2020-10-29 09:33:46,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 3402. [2020-10-29 09:33:46,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3402 states. [2020-10-29 09:33:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 4552 transitions. [2020-10-29 09:33:46,931 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 4552 transitions. Word has length 28 [2020-10-29 09:33:46,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:46,931 INFO L481 AbstractCegarLoop]: Abstraction has 3402 states and 4552 transitions. [2020-10-29 09:33:46,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 4552 transitions. [2020-10-29 09:33:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:33:46,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:46,936 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] [2020-10-29 09:33:46,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:33:46,936 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:46,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:46,937 INFO L82 PathProgramCache]: Analyzing trace with hash 743054051, now seen corresponding path program 1 times [2020-10-29 09:33:46,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:46,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225474390] [2020-10-29 09:33:46,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:46,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:46,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:47,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:47,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:33:47,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:47,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-29 09:33:47,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:47,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:47,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:47,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:33:47,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:33:47,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:47,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:47,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:47,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:47,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:47,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:47,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:47,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:47,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:47,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:47,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:47,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:47,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:47,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225474390] [2020-10-29 09:33:47,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:47,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:47,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636434195] [2020-10-29 09:33:47,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:47,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:47,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:47,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:47,135 INFO L87 Difference]: Start difference. First operand 3402 states and 4552 transitions. Second operand 4 states. [2020-10-29 09:33:47,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:47,398 INFO L93 Difference]: Finished difference Result 5646 states and 7563 transitions. [2020-10-29 09:33:47,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:47,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-29 09:33:47,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:47,444 INFO L225 Difference]: With dead ends: 5646 [2020-10-29 09:33:47,445 INFO L226 Difference]: Without dead ends: 5643 [2020-10-29 09:33:47,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:47,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2020-10-29 09:33:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5130. [2020-10-29 09:33:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5130 states. [2020-10-29 09:33:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 6664 transitions. [2020-10-29 09:33:47,605 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 6664 transitions. Word has length 28 [2020-10-29 09:33:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:47,605 INFO L481 AbstractCegarLoop]: Abstraction has 5130 states and 6664 transitions. [2020-10-29 09:33:47,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 6664 transitions. [2020-10-29 09:33:47,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:33:47,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:47,616 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] [2020-10-29 09:33:47,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:33:47,617 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:47,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:47,617 INFO L82 PathProgramCache]: Analyzing trace with hash 156248037, now seen corresponding path program 1 times [2020-10-29 09:33:47,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:47,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142027736] [2020-10-29 09:33:47,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:47,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:47,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:47,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:47,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:33:47,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:47,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-29 09:33:47,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:47,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:47,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:47,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:33:47,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:33:47,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:47,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:47,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:47,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:47,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:47,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:47,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:47,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:47,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:47,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:47,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:47,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:47,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:47,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142027736] [2020-10-29 09:33:47,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:47,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:47,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119204029] [2020-10-29 09:33:47,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:47,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:47,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:47,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:47,848 INFO L87 Difference]: Start difference. First operand 5130 states and 6664 transitions. Second operand 4 states. [2020-10-29 09:33:48,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:48,183 INFO L93 Difference]: Finished difference Result 11534 states and 14859 transitions. [2020-10-29 09:33:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:48,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-29 09:33:48,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:48,201 INFO L225 Difference]: With dead ends: 11534 [2020-10-29 09:33:48,201 INFO L226 Difference]: Without dead ends: 6539 [2020-10-29 09:33:48,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:48,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2020-10-29 09:33:48,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6538. [2020-10-29 09:33:48,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6538 states. [2020-10-29 09:33:48,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6538 states to 6538 states and 8200 transitions. [2020-10-29 09:33:48,505 INFO L78 Accepts]: Start accepts. Automaton has 6538 states and 8200 transitions. Word has length 28 [2020-10-29 09:33:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:48,505 INFO L481 AbstractCegarLoop]: Abstraction has 6538 states and 8200 transitions. [2020-10-29 09:33:48,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 6538 states and 8200 transitions. [2020-10-29 09:33:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:33:48,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:48,516 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] [2020-10-29 09:33:48,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:33:48,517 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:48,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:48,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1566531536, now seen corresponding path program 1 times [2020-10-29 09:33:48,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:48,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221213774] [2020-10-29 09:33:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:48,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:48,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:48,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:48,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:48,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:33:48,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:48,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-29 09:33:48,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:48,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:48,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:48,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:33:48,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:33:48,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:48,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:48,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:48,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:48,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:48,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:48,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:48,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:48,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:48,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:48,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221213774] [2020-10-29 09:33:48,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:48,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:48,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659909107] [2020-10-29 09:33:48,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:48,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:48,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:48,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:48,779 INFO L87 Difference]: Start difference. First operand 6538 states and 8200 transitions. Second operand 4 states. [2020-10-29 09:33:49,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:49,178 INFO L93 Difference]: Finished difference Result 10637 states and 13194 transitions. [2020-10-29 09:33:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:49,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-29 09:33:49,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:49,203 INFO L225 Difference]: With dead ends: 10637 [2020-10-29 09:33:49,203 INFO L226 Difference]: Without dead ends: 10634 [2020-10-29 09:33:49,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:49,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10634 states. [2020-10-29 09:33:49,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10634 to 10122. [2020-10-29 09:33:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10122 states. [2020-10-29 09:33:49,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10122 states to 10122 states and 12424 transitions. [2020-10-29 09:33:49,560 INFO L78 Accepts]: Start accepts. Automaton has 10122 states and 12424 transitions. Word has length 29 [2020-10-29 09:33:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:49,560 INFO L481 AbstractCegarLoop]: Abstraction has 10122 states and 12424 transitions. [2020-10-29 09:33:49,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:49,560 INFO L276 IsEmpty]: Start isEmpty. Operand 10122 states and 12424 transitions. [2020-10-29 09:33:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:33:49,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:49,575 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] [2020-10-29 09:33:49,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:33:49,576 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:49,576 INFO L82 PathProgramCache]: Analyzing trace with hash 979725522, now seen corresponding path program 1 times [2020-10-29 09:33:49,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:49,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294243813] [2020-10-29 09:33:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:49,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:49,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:49,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:49,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:49,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:33:49,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:49,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-29 09:33:49,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:49,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:49,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:49,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:33:49,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:33:49,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:49,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:49,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:49,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:49,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:49,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:49,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:49,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:49,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:49,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:49,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:49,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:49,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:49,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294243813] [2020-10-29 09:33:49,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:49,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:49,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925774896] [2020-10-29 09:33:49,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:49,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:49,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:49,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:49,738 INFO L87 Difference]: Start difference. First operand 10122 states and 12424 transitions. Second operand 4 states. [2020-10-29 09:33:50,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:50,131 INFO L93 Difference]: Finished difference Result 22666 states and 27528 transitions. [2020-10-29 09:33:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:50,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-29 09:33:50,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:50,196 INFO L225 Difference]: With dead ends: 22666 [2020-10-29 09:33:50,196 INFO L226 Difference]: Without dead ends: 0 [2020-10-29 09:33:50,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:50,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-29 09:33:50,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-29 09:33:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-29 09:33:50,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-29 09:33:50,234 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-29 09:33:50,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:50,234 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-29 09:33:50,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-29 09:33:50,234 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-29 09:33:50,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:33:50,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-29 09:34:05,289 WARN L193 SmtUtils]: Spent 15.03 s on a formula simplification. DAG size of input: 2120 DAG size of output: 32 [2020-10-29 09:34:05,367 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-29 09:34:05,369 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-29 09:34:05,369 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-29 09:34:05,369 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-29 09:34:05,369 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-29 09:34:05,369 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-29 09:34:05,369 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-29 09:34:05,369 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-29 09:34:05,370 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-29 09:34:05,370 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-29 09:34:05,370 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-29 09:34:05,370 INFO L274 CegarLoopResult]: For program point L126-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,370 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 151) no Hoare annotation was computed. [2020-10-29 09:34:05,370 INFO L274 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-10-29 09:34:05,370 INFO L274 CegarLoopResult]: For program point L127(line 127) no Hoare annotation was computed. [2020-10-29 09:34:05,370 INFO L274 CegarLoopResult]: For program point L111-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,370 INFO L274 CegarLoopResult]: For program point L136-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,370 INFO L274 CegarLoopResult]: For program point L95-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,371 INFO L274 CegarLoopResult]: For program point L87-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,371 INFO L274 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-10-29 09:34:05,371 INFO L274 CegarLoopResult]: For program point L79-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,371 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 151) no Hoare annotation was computed. [2020-10-29 09:34:05,372 INFO L274 CegarLoopResult]: For program point L137(line 137) no Hoare annotation was computed. [2020-10-29 09:34:05,372 INFO L274 CegarLoopResult]: For program point L71-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,372 INFO L274 CegarLoopResult]: For program point L63(lines 63 65) no Hoare annotation was computed. [2020-10-29 09:34:05,372 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 151) the Hoare annotation is: true [2020-10-29 09:34:05,372 INFO L274 CegarLoopResult]: For program point L63-2(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,372 INFO L274 CegarLoopResult]: For program point L121-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,373 INFO L274 CegarLoopResult]: For program point L122(line 122) no Hoare annotation was computed. [2020-10-29 09:34:05,373 INFO L277 CegarLoopResult]: At program point L147(lines 7 151) the Hoare annotation is: true [2020-10-29 09:34:05,373 INFO L274 CegarLoopResult]: For program point L106-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,373 INFO L274 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-10-29 09:34:05,373 INFO L274 CegarLoopResult]: For program point L131-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,373 INFO L274 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-10-29 09:34:05,373 INFO L274 CegarLoopResult]: For program point L132(line 132) no Hoare annotation was computed. [2020-10-29 09:34:05,373 INFO L274 CegarLoopResult]: For program point L91-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,373 INFO L274 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-10-29 09:34:05,373 INFO L274 CegarLoopResult]: For program point L116-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,374 INFO L274 CegarLoopResult]: For program point L83-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,374 INFO L277 CegarLoopResult]: At program point L141-1(lines 38 146) the Hoare annotation is: true [2020-10-29 09:34:05,374 INFO L274 CegarLoopResult]: For program point L75-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,374 INFO L274 CegarLoopResult]: For program point L67-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,374 INFO L274 CegarLoopResult]: For program point L117(line 117) no Hoare annotation was computed. [2020-10-29 09:34:05,374 INFO L274 CegarLoopResult]: For program point L142(line 142) no Hoare annotation was computed. [2020-10-29 09:34:05,374 INFO L270 CegarLoopResult]: At program point L142-1(lines 7 151) the Hoare annotation is: false [2020-10-29 09:34:05,374 INFO L274 CegarLoopResult]: For program point L101-1(lines 38 146) no Hoare annotation was computed. [2020-10-29 09:34:05,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:34:05 BoogieIcfgContainer [2020-10-29 09:34:05,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:34:05,392 INFO L168 Benchmark]: Toolchain (without parser) took 29805.68 ms. Allocated memory was 158.3 MB in the beginning and 669.0 MB in the end (delta: 510.7 MB). Free memory was 134.0 MB in the beginning and 521.9 MB in the end (delta: -387.8 MB). Peak memory consumption was 431.5 MB. Max. memory is 8.0 GB. [2020-10-29 09:34:05,393 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 158.3 MB. Free memory is still 131.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:34:05,393 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.04 ms. Allocated memory is still 158.3 MB. Free memory was 133.4 MB in the beginning and 123.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-29 09:34:05,394 INFO L168 Benchmark]: Boogie Preprocessor took 48.24 ms. Allocated memory is still 158.3 MB. Free memory was 123.3 MB in the beginning and 121.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:34:05,394 INFO L168 Benchmark]: RCFGBuilder took 646.96 ms. Allocated memory is still 158.3 MB. Free memory was 121.6 MB in the beginning and 101.9 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-10-29 09:34:05,395 INFO L168 Benchmark]: TraceAbstraction took 28819.54 ms. Allocated memory was 158.3 MB in the beginning and 669.0 MB in the end (delta: 510.7 MB). Free memory was 101.5 MB in the beginning and 521.9 MB in the end (delta: -420.4 MB). Peak memory consumption was 399.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:34:05,402 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 158.3 MB. Free memory is still 131.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.04 ms. Allocated memory is still 158.3 MB. Free memory was 133.4 MB in the beginning and 123.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.24 ms. Allocated memory is still 158.3 MB. Free memory was 123.3 MB in the beginning and 121.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 646.96 ms. Allocated memory is still 158.3 MB. Free memory was 121.6 MB in the beginning and 101.9 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 28819.54 ms. Allocated memory was 158.3 MB in the beginning and 669.0 MB in the end (delta: 510.7 MB). Free memory was 101.5 MB in the beginning and 521.9 MB in the end (delta: -420.4 MB). Peak memory consumption was 399.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.5s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 15.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1800 SDtfs, 2598 SDslu, 178 SDs, 0 SdLazy, 1304 SolverSat, 84 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10122occurred in iteration=22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 2047 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 30 PreInvPairs, 545 NumberOfFragments, 38 HoareAnnotationTreeSize, 30 FomulaSimplifications, 13555690 FormulaSimplificationTreeSizeReduction, 15.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 580 NumberOfCodeBlocks, 580 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 557 ConstructedInterpolants, 0 QuantifiedInterpolants, 41922 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...