/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/diamond_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:55:30,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:55:30,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:55:31,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:55:31,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:55:31,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:55:31,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:55:31,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:55:31,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:55:31,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:55:31,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:55:31,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:55:31,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:55:31,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:55:31,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:55:31,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:55:31,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:55:31,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:55:31,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:55:31,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:55:31,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:55:31,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:55:31,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:55:31,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:55:31,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:55:31,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:55:31,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:55:31,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:55:31,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:55:31,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:55:31,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:55:31,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:55:31,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:55:31,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:55:31,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:55:31,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:55:31,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:55:31,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:55:31,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:55:31,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:55:31,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:55:31,111 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:55:31,160 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:55:31,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:55:31,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:55:31,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:55:31,165 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:55:31,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:55:31,165 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:55:31,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:55:31,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:55:31,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:55:31,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:55:31,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:55:31,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:55:31,168 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:55:31,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:55:31,168 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:55:31,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:55:31,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:55:31,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:55:31,169 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:55:31,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:55:31,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:55:31,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:55:31,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:55:31,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:55:31,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:55:31,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:55:31,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:55:31,174 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:55:31,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:55:31,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:55:31,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:55:31,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:55:31,593 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:55:31,594 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:55:31,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2020-10-28 14:55:31,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3305e3012/4f4d8838a5954768bf7ec80318a2eaf0/FLAG62d0667ab [2020-10-28 14:55:32,304 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:55:32,306 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2020-10-28 14:55:32,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3305e3012/4f4d8838a5954768bf7ec80318a2eaf0/FLAG62d0667ab [2020-10-28 14:55:32,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3305e3012/4f4d8838a5954768bf7ec80318a2eaf0 [2020-10-28 14:55:32,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:55:32,678 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:55:32,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:55:32,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:55:32,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:55:32,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:55:32" (1/1) ... [2020-10-28 14:55:32,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f9819a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:55:32, skipping insertion in model container [2020-10-28 14:55:32,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:55:32" (1/1) ... [2020-10-28 14:55:32,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:55:32,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:55:32,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:55:32,950 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:55:32,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:55:32,993 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:55:32,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:55:32 WrapperNode [2020-10-28 14:55:32,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:55:32,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:55:32,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:55:32,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:55:33,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:55:32" (1/1) ... [2020-10-28 14:55:33,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:55:32" (1/1) ... [2020-10-28 14:55:33,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:55:32" (1/1) ... [2020-10-28 14:55:33,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:55:32" (1/1) ... [2020-10-28 14:55:33,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:55:32" (1/1) ... [2020-10-28 14:55:33,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:55:32" (1/1) ... [2020-10-28 14:55:33,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:55:32" (1/1) ... [2020-10-28 14:55:33,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:55:33,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:55:33,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:55:33,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:55:33,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:55:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:55:33,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:55:33,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:55:33,115 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:55:33,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:55:33,116 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:55:33,116 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:55:33,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:55:33,117 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:55:33,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:55:33,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-28 14:55:33,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:55:33,119 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:55:33,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:55:33,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:55:33,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:55:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:55:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:55:33,483 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:55:33,490 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:55:33,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:55:33 BoogieIcfgContainer [2020-10-28 14:55:33,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:55:33,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:55:33,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:55:33,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:55:33,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:55:32" (1/3) ... [2020-10-28 14:55:33,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f4076d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:55:33, skipping insertion in model container [2020-10-28 14:55:33,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:55:32" (2/3) ... [2020-10-28 14:55:33,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f4076d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:55:33, skipping insertion in model container [2020-10-28 14:55:33,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:55:33" (3/3) ... [2020-10-28 14:55:33,509 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-2.c [2020-10-28 14:55:33,523 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:55:33,533 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:55:33,548 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:55:33,593 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:55:33,593 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:55:33,593 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:55:33,593 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:55:33,594 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:55:33,594 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:55:33,594 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:55:33,594 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:55:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-28 14:55:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:55:33,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:33,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:33,648 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:33,658 INFO L82 PathProgramCache]: Analyzing trace with hash -2020849535, now seen corresponding path program 1 times [2020-10-28 14:55:33,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:33,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144531590] [2020-10-28 14:55:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:33,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:34,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:34,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:55:34,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:34,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-28 14:55:34,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:34,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:34,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:34,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:55:34,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:34,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:55:34,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:34,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:34,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:34,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:34,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:34,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 14:55:34,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:34,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:34,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:34,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:34,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:34,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:34,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144531590] [2020-10-28 14:55:34,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:55:34,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:55:34,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391639489] [2020-10-28 14:55:34,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:55:34,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:34,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:55:34,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:55:34,175 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-28 14:55:34,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:34,306 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-28 14:55:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:55:34,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:55:34,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:34,321 INFO L225 Difference]: With dead ends: 35 [2020-10-28 14:55:34,321 INFO L226 Difference]: Without dead ends: 14 [2020-10-28 14:55:34,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:55:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-28 14:55:34,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-28 14:55:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-28 14:55:34,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-28 14:55:34,391 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-10-28 14:55:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:34,392 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-28 14:55:34,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:55:34,392 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-28 14:55:34,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:55:34,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:34,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:34,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:55:34,393 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:34,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1987826251, now seen corresponding path program 1 times [2020-10-28 14:55:34,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:34,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841991535] [2020-10-28 14:55:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:34,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:34,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:34,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:55:34,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:34,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-28 14:55:34,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:34,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:34,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:55:34,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:34,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:55:34,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:34,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:34,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:34,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:34,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:34,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:34,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:55:34,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:34,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:34,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:34,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:34,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:34,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:34,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841991535] [2020-10-28 14:55:34,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:55:34,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:55:34,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235293430] [2020-10-28 14:55:34,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:55:34,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:34,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:55:34,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:55:34,735 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-28 14:55:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:34,828 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-10-28 14:55:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:55:34,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 14:55:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:34,831 INFO L225 Difference]: With dead ends: 22 [2020-10-28 14:55:34,831 INFO L226 Difference]: Without dead ends: 16 [2020-10-28 14:55:34,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:55:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-28 14:55:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-28 14:55:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 14:55:34,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-28 14:55:34,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-28 14:55:34,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:34,842 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-28 14:55:34,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:55:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-28 14:55:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 14:55:34,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:34,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:34,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:55:34,844 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1243554288, now seen corresponding path program 1 times [2020-10-28 14:55:34,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:34,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853905499] [2020-10-28 14:55:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:34,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:35,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:35,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:55:35,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:35,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-28 14:55:35,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:35,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:35,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:55:35,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:35,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:55:35,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:35,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:35,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:35,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:35,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:35,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:35,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:55:35,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:35,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:35,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:35,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:35,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:35,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:35,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853905499] [2020-10-28 14:55:35,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:35,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:55:35,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817368447] [2020-10-28 14:55:35,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:55:35,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:35,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:55:35,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:55:35,154 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-10-28 14:55:35,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:35,286 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-28 14:55:35,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:55:35,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-28 14:55:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:35,287 INFO L225 Difference]: With dead ends: 24 [2020-10-28 14:55:35,288 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 14:55:35,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:55:35,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 14:55:35,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-28 14:55:35,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 14:55:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-28 14:55:35,295 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-28 14:55:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:35,296 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-28 14:55:35,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:55:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-28 14:55:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:55:35,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:35,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:35,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:55:35,297 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:35,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:35,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1338897259, now seen corresponding path program 2 times [2020-10-28 14:55:35,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:35,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820265661] [2020-10-28 14:55:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:35,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:35,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:35,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:55:35,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:35,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-28 14:55:35,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:35,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:35,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:55:35,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:35,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:55:35,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:35,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:35,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:35,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:35,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:35,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:35,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:55:35,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:35,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:35,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:35,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:35,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:35,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:35,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820265661] [2020-10-28 14:55:35,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:35,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:55:35,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588763298] [2020-10-28 14:55:35,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:55:35,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:35,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:55:35,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:55:35,565 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2020-10-28 14:55:35,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:35,739 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-10-28 14:55:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:55:35,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-28 14:55:35,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:35,741 INFO L225 Difference]: With dead ends: 27 [2020-10-28 14:55:35,741 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 14:55:35,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:55:35,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 14:55:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-28 14:55:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 14:55:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-28 14:55:35,749 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2020-10-28 14:55:35,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:35,749 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-28 14:55:35,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:55:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-28 14:55:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:55:35,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:35,750 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:35,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:55:35,751 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:35,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:35,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2018955629, now seen corresponding path program 1 times [2020-10-28 14:55:35,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:35,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211468497] [2020-10-28 14:55:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:35,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:35,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:35,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:55:35,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:35,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 14:55:35,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:35,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:35,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:55:35,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:55:35,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:55:35,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:35,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:35,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:35,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:35,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:35,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:35,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:55:35,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:35,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:35,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:35,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:35,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:35,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:35,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211468497] [2020-10-28 14:55:35,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:55:35,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:55:35,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583019637] [2020-10-28 14:55:35,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:55:35,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:35,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:55:35,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:55:35,862 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2020-10-28 14:55:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:35,926 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-10-28 14:55:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:55:35,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 14:55:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:35,928 INFO L225 Difference]: With dead ends: 31 [2020-10-28 14:55:35,929 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 14:55:35,929 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 [2020-10-28 14:55:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 14:55:35,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-28 14:55:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 14:55:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-28 14:55:35,938 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2020-10-28 14:55:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:35,938 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-28 14:55:35,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:55:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-28 14:55:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:55:35,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:35,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:35,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:55:35,940 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:35,940 INFO L82 PathProgramCache]: Analyzing trace with hash 501004305, now seen corresponding path program 1 times [2020-10-28 14:55:35,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:35,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013089420] [2020-10-28 14:55:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:35,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:35,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:36,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:36,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:55:36,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:36,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-28 14:55:36,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:36,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:36,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:55:36,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:36,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:55:36,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:36,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:36,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:36,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:36,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:36,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:36,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:55:36,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:36,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:36,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:36,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:36,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:36,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:36,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013089420] [2020-10-28 14:55:36,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:36,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:55:36,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843175062] [2020-10-28 14:55:36,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:55:36,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:36,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:55:36,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:55:36,402 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-10-28 14:55:36,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:36,683 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-28 14:55:36,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:55:36,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-28 14:55:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:36,684 INFO L225 Difference]: With dead ends: 34 [2020-10-28 14:55:36,685 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:55:36,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:55:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:55:36,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-28 14:55:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 14:55:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-28 14:55:36,694 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2020-10-28 14:55:36,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:36,695 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-28 14:55:36,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:55:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-28 14:55:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:55:36,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:36,696 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:36,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:55:36,696 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:36,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:36,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1525788122, now seen corresponding path program 3 times [2020-10-28 14:55:36,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:36,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692224394] [2020-10-28 14:55:36,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:36,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:36,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:36,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:55:36,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:36,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-28 14:55:36,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:36,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:36,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:55:36,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:36,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:55:36,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:36,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:36,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:36,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:36,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:36,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:36,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:55:36,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:36,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:36,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:36,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:36,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:36,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:36,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692224394] [2020-10-28 14:55:36,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:36,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:55:36,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673165492] [2020-10-28 14:55:36,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:55:36,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:36,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:55:36,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:55:36,948 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 7 states. [2020-10-28 14:55:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:37,201 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-28 14:55:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:55:37,202 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-28 14:55:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:37,203 INFO L225 Difference]: With dead ends: 39 [2020-10-28 14:55:37,203 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 14:55:37,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:55:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 14:55:37,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-28 14:55:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 14:55:37,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-28 14:55:37,212 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2020-10-28 14:55:37,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:37,212 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-28 14:55:37,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:55:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-28 14:55:37,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:55:37,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:37,213 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:37,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:55:37,214 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:37,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:37,214 INFO L82 PathProgramCache]: Analyzing trace with hash -929277610, now seen corresponding path program 2 times [2020-10-28 14:55:37,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:37,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250284585] [2020-10-28 14:55:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:37,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:37,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:37,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:37,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:55:37,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:37,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-28 14:55:37,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:37,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:37,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:55:37,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:55:37,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:55:37,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:37,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:37,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:37,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:37,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:37,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:37,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:55:37,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:37,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:37,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:37,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:37,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:37,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:55:37,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250284585] [2020-10-28 14:55:37,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:55:37,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:55:37,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066209711] [2020-10-28 14:55:37,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:55:37,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:37,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:55:37,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:55:37,356 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2020-10-28 14:55:37,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:37,427 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-10-28 14:55:37,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:55:37,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-28 14:55:37,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:37,428 INFO L225 Difference]: With dead ends: 36 [2020-10-28 14:55:37,428 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 14:55:37,429 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 [2020-10-28 14:55:37,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 14:55:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-28 14:55:37,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 14:55:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-28 14:55:37,436 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-10-28 14:55:37,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:37,436 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-28 14:55:37,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:55:37,437 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-28 14:55:37,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:55:37,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:37,437 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:37,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:55:37,438 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:37,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1630342188, now seen corresponding path program 2 times [2020-10-28 14:55:37,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:37,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932097994] [2020-10-28 14:55:37,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:37,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:37,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:37,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:55:37,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:37,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-28 14:55:37,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:37,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:37,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:55:37,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:37,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:55:37,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:37,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:37,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:37,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:37,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:37,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:37,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:55:37,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:37,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:37,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:37,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:37,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:37,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:37,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932097994] [2020-10-28 14:55:37,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:37,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:55:37,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281936589] [2020-10-28 14:55:37,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:55:37,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:37,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:55:37,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:55:37,656 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-28 14:55:37,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:37,873 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-28 14:55:37,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:55:37,874 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-28 14:55:37,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:37,874 INFO L225 Difference]: With dead ends: 37 [2020-10-28 14:55:37,875 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 14:55:37,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:55:37,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 14:55:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-28 14:55:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:55:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-28 14:55:37,883 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 18 [2020-10-28 14:55:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:37,883 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-28 14:55:37,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:55:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-28 14:55:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:55:37,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:37,884 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:37,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:55:37,885 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:37,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1414402527, now seen corresponding path program 4 times [2020-10-28 14:55:37,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:37,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443299045] [2020-10-28 14:55:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:37,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:37,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:38,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:55:38,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:38,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-28 14:55:38,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:38,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:38,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:55:38,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:38,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:55:38,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:38,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:38,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:38,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:38,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:38,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:38,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:55:38,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:38,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:38,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:38,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:38,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:38,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:38,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443299045] [2020-10-28 14:55:38,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:38,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:55:38,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105964885] [2020-10-28 14:55:38,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:55:38,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:38,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:55:38,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:55:38,119 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-28 14:55:38,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:38,453 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-28 14:55:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:55:38,454 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-28 14:55:38,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:38,454 INFO L225 Difference]: With dead ends: 39 [2020-10-28 14:55:38,455 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 14:55:38,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:55:38,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 14:55:38,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-28 14:55:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 14:55:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-28 14:55:38,466 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2020-10-28 14:55:38,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:38,467 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-28 14:55:38,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:55:38,467 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-28 14:55:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:55:38,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:38,468 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:38,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:55:38,468 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:38,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1747028132, now seen corresponding path program 5 times [2020-10-28 14:55:38,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:38,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483410493] [2020-10-28 14:55:38,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:38,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:38,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:38,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:55:38,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:38,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-28 14:55:38,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:38,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:38,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:55:38,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:38,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:55:38,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:38,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:38,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:38,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:38,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:38,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:38,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:55:38,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:38,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:38,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:38,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:38,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:38,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:38,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483410493] [2020-10-28 14:55:38,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:38,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:55:38,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347528337] [2020-10-28 14:55:38,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:55:38,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:38,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:55:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:55:38,796 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-10-28 14:55:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:39,204 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-28 14:55:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:55:39,205 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-28 14:55:39,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:39,206 INFO L225 Difference]: With dead ends: 41 [2020-10-28 14:55:39,206 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 14:55:39,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:55:39,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 14:55:39,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-28 14:55:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 14:55:39,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-28 14:55:39,216 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 22 [2020-10-28 14:55:39,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:39,216 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-28 14:55:39,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:55:39,217 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-28 14:55:39,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:55:39,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:39,217 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:39,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:55:39,218 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:39,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:39,218 INFO L82 PathProgramCache]: Analyzing trace with hash 457567514, now seen corresponding path program 3 times [2020-10-28 14:55:39,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:39,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653276340] [2020-10-28 14:55:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:39,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:39,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:39,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:55:39,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:39,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-28 14:55:39,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:39,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:55:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:55:39,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:39,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:39,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:39,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:39,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:39,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:39,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:55:39,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:39,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:39,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:39,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:39,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:39,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:39,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653276340] [2020-10-28 14:55:39,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:39,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:55:39,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819212175] [2020-10-28 14:55:39,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:55:39,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:39,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:55:39,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:55:39,532 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 9 states. [2020-10-28 14:55:39,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:39,914 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-28 14:55:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:55:39,915 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-28 14:55:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:39,915 INFO L225 Difference]: With dead ends: 45 [2020-10-28 14:55:39,915 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:55:39,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:55:39,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:55:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-28 14:55:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:55:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-28 14:55:39,925 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 22 [2020-10-28 14:55:39,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:39,925 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-28 14:55:39,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:55:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-28 14:55:39,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:55:39,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:39,927 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:39,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:55:39,927 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:39,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:39,927 INFO L82 PathProgramCache]: Analyzing trace with hash -722312663, now seen corresponding path program 6 times [2020-10-28 14:55:39,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:39,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799021830] [2020-10-28 14:55:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:39,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:40,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:40,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:55:40,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:40,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-28 14:55:40,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:40,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:40,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:55:40,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:40,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:55:40,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:40,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:40,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:40,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:40,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:40,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:40,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:55:40,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:40,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:40,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:40,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:40,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:40,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:40,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799021830] [2020-10-28 14:55:40,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:40,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:55:40,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989976473] [2020-10-28 14:55:40,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:55:40,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:40,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:55:40,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:55:40,237 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 10 states. [2020-10-28 14:55:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:40,646 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-28 14:55:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:55:40,647 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-28 14:55:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:40,647 INFO L225 Difference]: With dead ends: 47 [2020-10-28 14:55:40,648 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 14:55:40,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:55:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 14:55:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-28 14:55:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:55:40,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-28 14:55:40,665 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 24 [2020-10-28 14:55:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:40,666 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-28 14:55:40,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:55:40,666 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-28 14:55:40,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:55:40,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:40,667 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:40,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:55:40,669 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:40,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:40,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1358098030, now seen corresponding path program 7 times [2020-10-28 14:55:40,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:40,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609616745] [2020-10-28 14:55:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:40,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:40,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:40,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:55:40,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:40,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-28 14:55:40,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:40,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:40,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:55:40,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:40,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:55:40,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:41,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:41,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:41,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:41,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:41,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:41,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:55:41,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:41,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:41,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:41,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:41,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:41,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:41,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609616745] [2020-10-28 14:55:41,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:41,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:55:41,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179081784] [2020-10-28 14:55:41,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:55:41,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:41,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:55:41,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:55:41,105 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 11 states. [2020-10-28 14:55:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:41,642 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-28 14:55:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:55:41,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-28 14:55:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:41,644 INFO L225 Difference]: With dead ends: 49 [2020-10-28 14:55:41,644 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:55:41,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:55:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:55:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-28 14:55:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:55:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-28 14:55:41,660 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 26 [2020-10-28 14:55:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:41,660 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-28 14:55:41,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:55:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-28 14:55:41,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:55:41,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:41,662 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:41,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:55:41,664 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:41,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:41,665 INFO L82 PathProgramCache]: Analyzing trace with hash -949038240, now seen corresponding path program 4 times [2020-10-28 14:55:41,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:41,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222226269] [2020-10-28 14:55:41,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:41,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:41,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:41,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:55:41,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:41,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-28 14:55:41,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:41,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:41,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:55:41,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:41,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:55:41,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:41,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:41,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:41,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:41,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:41,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:41,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:55:41,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:41,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:41,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:41,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:41,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:41,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:42,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222226269] [2020-10-28 14:55:42,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:42,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:55:42,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056213291] [2020-10-28 14:55:42,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:55:42,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:42,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:55:42,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:55:42,005 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 11 states. [2020-10-28 14:55:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:42,507 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-28 14:55:42,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:55:42,507 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-28 14:55:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:42,508 INFO L225 Difference]: With dead ends: 53 [2020-10-28 14:55:42,508 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 14:55:42,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:55:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 14:55:42,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-28 14:55:42,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:55:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-28 14:55:42,519 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 26 [2020-10-28 14:55:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:42,520 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-28 14:55:42,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:55:42,520 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-28 14:55:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:55:42,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:42,521 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:42,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:55:42,521 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:42,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:42,522 INFO L82 PathProgramCache]: Analyzing trace with hash -821985933, now seen corresponding path program 8 times [2020-10-28 14:55:42,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:42,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089971695] [2020-10-28 14:55:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:42,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:42,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:42,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:55:42,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:42,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-28 14:55:42,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:42,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:42,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:55:42,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:42,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:55:42,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:42,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:42,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:42,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:42,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:42,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:42,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:55:42,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:42,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:42,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:42,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:42,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:42,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:42,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089971695] [2020-10-28 14:55:42,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:42,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:55:42,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259412411] [2020-10-28 14:55:42,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:55:42,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:42,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:55:42,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:55:42,974 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 12 states. [2020-10-28 14:55:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:43,512 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-28 14:55:43,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:55:43,514 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-28 14:55:43,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:43,515 INFO L225 Difference]: With dead ends: 55 [2020-10-28 14:55:43,515 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:55:43,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:55:43,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:55:43,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-28 14:55:43,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:55:43,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-28 14:55:43,526 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 28 [2020-10-28 14:55:43,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:43,526 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-28 14:55:43,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:55:43,527 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-28 14:55:43,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:55:43,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:43,528 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:43,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:55:43,528 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:43,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:43,529 INFO L82 PathProgramCache]: Analyzing trace with hash 61366072, now seen corresponding path program 9 times [2020-10-28 14:55:43,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:43,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136593680] [2020-10-28 14:55:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:43,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:43,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:43,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:55:43,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:43,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-28 14:55:43,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:43,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:43,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:55:43,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:43,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:55:43,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:43,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:43,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:43,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:43,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:43,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:43,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:55:43,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:43,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:43,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:43,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:43,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:43,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:43,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136593680] [2020-10-28 14:55:43,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:43,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:55:43,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700215291] [2020-10-28 14:55:43,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:55:43,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:43,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:55:43,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:55:43,998 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 13 states. [2020-10-28 14:55:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:44,595 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-28 14:55:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:55:44,597 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-28 14:55:44,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:44,598 INFO L225 Difference]: With dead ends: 57 [2020-10-28 14:55:44,598 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 14:55:44,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:55:44,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 14:55:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-28 14:55:44,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 14:55:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-28 14:55:44,621 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 30 [2020-10-28 14:55:44,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:44,621 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-28 14:55:44,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:55:44,624 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-28 14:55:44,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:55:44,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:44,629 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:44,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:55:44,630 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:44,630 INFO L82 PathProgramCache]: Analyzing trace with hash -863033690, now seen corresponding path program 5 times [2020-10-28 14:55:44,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:44,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901922398] [2020-10-28 14:55:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:44,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:44,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:44,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:55:44,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:44,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-28 14:55:44,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:44,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:44,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:55:44,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:44,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:55:44,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:45,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:45,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:45,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:45,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:45,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:45,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:55:45,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:45,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:45,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:45,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:45,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:45,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:45,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901922398] [2020-10-28 14:55:45,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:45,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:55:45,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43962220] [2020-10-28 14:55:45,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:55:45,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:45,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:55:45,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:55:45,125 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 13 states. [2020-10-28 14:55:45,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:45,790 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-28 14:55:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:55:45,790 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-28 14:55:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:45,791 INFO L225 Difference]: With dead ends: 61 [2020-10-28 14:55:45,791 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:55:45,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:55:45,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:55:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-28 14:55:45,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 14:55:45,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-28 14:55:45,811 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 30 [2020-10-28 14:55:45,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:45,812 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-28 14:55:45,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:55:45,812 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-28 14:55:45,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:55:45,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:45,819 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:45,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:55:45,820 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:45,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:45,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1440881731, now seen corresponding path program 10 times [2020-10-28 14:55:45,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:45,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024174672] [2020-10-28 14:55:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:45,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:46,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:46,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:55:46,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:46,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-28 14:55:46,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:46,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:46,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:55:46,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:46,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:55:46,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:46,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:46,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:46,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:46,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:46,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:46,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:55:46,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:46,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:46,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:46,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:46,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:46,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:46,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024174672] [2020-10-28 14:55:46,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:46,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:55:46,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442328599] [2020-10-28 14:55:46,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:55:46,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:46,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:55:46,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:55:46,360 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 14 states. [2020-10-28 14:55:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:47,080 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-28 14:55:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:55:47,081 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-28 14:55:47,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:47,082 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:55:47,082 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 14:55:47,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:55:47,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 14:55:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-28 14:55:47,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 14:55:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-28 14:55:47,093 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 32 [2020-10-28 14:55:47,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:47,093 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-28 14:55:47,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:55:47,093 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-28 14:55:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:55:47,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:47,094 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:47,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:55:47,095 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:47,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:47,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1992008958, now seen corresponding path program 11 times [2020-10-28 14:55:47,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:47,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622782592] [2020-10-28 14:55:47,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:47,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:47,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:47,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:55:47,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:47,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-28 14:55:47,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:47,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:47,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:55:47,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:47,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:55:47,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:47,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:47,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:47,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:47,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:47,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:47,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:55:47,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:47,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:47,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:47,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:47,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:47,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:47,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622782592] [2020-10-28 14:55:47,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:47,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:55:47,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49895241] [2020-10-28 14:55:47,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:55:47,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:47,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:55:47,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:55:47,722 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 15 states. [2020-10-28 14:55:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:48,560 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-28 14:55:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:55:48,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-28 14:55:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:48,561 INFO L225 Difference]: With dead ends: 65 [2020-10-28 14:55:48,562 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:55:48,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:55:48,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:55:48,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-28 14:55:48,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:55:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-28 14:55:48,573 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 34 [2020-10-28 14:55:48,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:48,573 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-28 14:55:48,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:55:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-28 14:55:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:55:48,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:48,575 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:48,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:55:48,575 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:48,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:48,576 INFO L82 PathProgramCache]: Analyzing trace with hash -685218068, now seen corresponding path program 6 times [2020-10-28 14:55:48,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:48,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839755405] [2020-10-28 14:55:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:48,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:48,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:48,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:55:48,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:48,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-28 14:55:48,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:48,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:48,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:55:48,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:48,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:55:48,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:49,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:49,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:49,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:49,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:49,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:49,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:55:49,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:49,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:49,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:49,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:49,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:49,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:49,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839755405] [2020-10-28 14:55:49,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:49,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:55:49,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527724779] [2020-10-28 14:55:49,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:55:49,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:49,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:55:49,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:55:49,135 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-10-28 14:55:50,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:50,023 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-28 14:55:50,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:55:50,023 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-28 14:55:50,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:50,025 INFO L225 Difference]: With dead ends: 69 [2020-10-28 14:55:50,025 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 14:55:50,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:55:50,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 14:55:50,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-28 14:55:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 14:55:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-28 14:55:50,041 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 34 [2020-10-28 14:55:50,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:50,042 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-28 14:55:50,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:55:50,042 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-28 14:55:50,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:55:50,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:50,046 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:50,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:55:50,046 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:50,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:50,047 INFO L82 PathProgramCache]: Analyzing trace with hash 950670599, now seen corresponding path program 12 times [2020-10-28 14:55:50,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:50,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046735798] [2020-10-28 14:55:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:50,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:50,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:50,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:55:50,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:50,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-28 14:55:50,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:50,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:50,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:55:50,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:50,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:55:50,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:50,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:50,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:50,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:50,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:50,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:50,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:55:50,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:50,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:50,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:50,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:50,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:50,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:55:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:50,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046735798] [2020-10-28 14:55:50,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:50,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:55:50,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946452478] [2020-10-28 14:55:50,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:55:50,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:50,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:55:50,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:55:50,829 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 16 states. [2020-10-28 14:55:51,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:51,726 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-28 14:55:51,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:55:51,726 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-28 14:55:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:51,727 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:55:51,727 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 14:55:51,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:55:51,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 14:55:51,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-28 14:55:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 14:55:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-28 14:55:51,744 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 36 [2020-10-28 14:55:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:51,745 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-28 14:55:51,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:55:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-28 14:55:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:55:51,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:51,750 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:51,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:55:51,750 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:51,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:51,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1517723188, now seen corresponding path program 13 times [2020-10-28 14:55:51,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:51,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589246641] [2020-10-28 14:55:51,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:51,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:52,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:52,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:55:52,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:52,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-28 14:55:52,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:52,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:55:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:55:52,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:52,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:52,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:52,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:52,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:52,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:52,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:55:52,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:52,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:52,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:52,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:52,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:52,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:52,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589246641] [2020-10-28 14:55:52,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:52,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:55:52,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226060476] [2020-10-28 14:55:52,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:55:52,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:52,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:55:52,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:55:52,486 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-10-28 14:55:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:53,482 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-28 14:55:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:55:53,484 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-28 14:55:53,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:53,485 INFO L225 Difference]: With dead ends: 73 [2020-10-28 14:55:53,485 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 14:55:53,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:55:53,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 14:55:53,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-28 14:55:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 14:55:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-28 14:55:53,498 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 38 [2020-10-28 14:55:53,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:53,498 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-28 14:55:53,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:55:53,498 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-28 14:55:53,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:55:53,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:53,499 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:53,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:55:53,499 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:53,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1996231730, now seen corresponding path program 7 times [2020-10-28 14:55:53,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:53,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688500489] [2020-10-28 14:55:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:53,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:53,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:53,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:55:53,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:53,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-28 14:55:53,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:53,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:53,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:55:53,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:53,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:55:53,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:54,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:54,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:54,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:54,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:54,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:54,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:55:54,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:54,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:54,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:54,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:54,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688500489] [2020-10-28 14:55:54,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:54,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:55:54,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163207637] [2020-10-28 14:55:54,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:55:54,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:54,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:55:54,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:55:54,183 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 17 states. [2020-10-28 14:55:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:55,243 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-28 14:55:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:55:55,244 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-28 14:55:55,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:55,245 INFO L225 Difference]: With dead ends: 77 [2020-10-28 14:55:55,245 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 14:55:55,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:55:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 14:55:55,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-28 14:55:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 14:55:55,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-28 14:55:55,256 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 38 [2020-10-28 14:55:55,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:55,256 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-28 14:55:55,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:55:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-28 14:55:55,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:55:55,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:55,257 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:55,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:55:55,258 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:55,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:55,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1472762193, now seen corresponding path program 14 times [2020-10-28 14:55:55,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:55,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542691820] [2020-10-28 14:55:55,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:55,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:55,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:55,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:55:55,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:55,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-28 14:55:55,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:55,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:55,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:55:55,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:55,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:55:55,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:56,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:56,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:56,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:56,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:56,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:56,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:55:56,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:56,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:56,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:56,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542691820] [2020-10-28 14:55:56,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:56,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:55:56,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093557589] [2020-10-28 14:55:56,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:55:56,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:56,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:55:56,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:55:56,057 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 18 states. [2020-10-28 14:55:57,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:57,159 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-28 14:55:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:55:57,159 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-28 14:55:57,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:57,161 INFO L225 Difference]: With dead ends: 79 [2020-10-28 14:55:57,161 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 14:55:57,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:55:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 14:55:57,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-28 14:55:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 14:55:57,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-28 14:55:57,172 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 40 [2020-10-28 14:55:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:57,172 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-28 14:55:57,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:55:57,172 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-28 14:55:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:55:57,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:57,173 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:57,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:55:57,173 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:57,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:57,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1996092310, now seen corresponding path program 15 times [2020-10-28 14:55:57,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:57,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892534450] [2020-10-28 14:55:57,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:57,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:57,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:57,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:55:57,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:57,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-28 14:55:57,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:57,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:57,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:55:57,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:57,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:55:57,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:55:57,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:57,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:57,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:57,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:57,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:57,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:55:57,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:57,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:57,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:57,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:57,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:57,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:57,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892534450] [2020-10-28 14:55:57,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:57,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:55:57,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002209078] [2020-10-28 14:55:57,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:55:57,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:57,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:55:57,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:55:57,986 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 19 states. [2020-10-28 14:55:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:59,188 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-28 14:55:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:55:59,189 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-28 14:55:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:59,190 INFO L225 Difference]: With dead ends: 81 [2020-10-28 14:55:59,190 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 14:55:59,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:55:59,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 14:55:59,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-28 14:55:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 14:55:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-28 14:55:59,199 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 42 [2020-10-28 14:55:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:59,199 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-28 14:55:59,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:55:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-28 14:55:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:55:59,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:59,200 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:59,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:55:59,201 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:59,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:59,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2131471992, now seen corresponding path program 8 times [2020-10-28 14:55:59,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:59,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693071153] [2020-10-28 14:55:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:59,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:59,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:59,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:55:59,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:59,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-28 14:55:59,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:59,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:59,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:55:59,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:55:59,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:55:59,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:59,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:59,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:59,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:59,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:59,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:59,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:55:59,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:59,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:59,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:59,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:59,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:59,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:59,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693071153] [2020-10-28 14:55:59,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:59,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:55:59,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925487835] [2020-10-28 14:55:59,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:55:59,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:59,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:55:59,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:55:59,954 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 19 states. [2020-10-28 14:56:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:01,215 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-28 14:56:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:56:01,215 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-28 14:56:01,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:01,216 INFO L225 Difference]: With dead ends: 85 [2020-10-28 14:56:01,216 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 14:56:01,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:56:01,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 14:56:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-28 14:56:01,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 14:56:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-28 14:56:01,228 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 42 [2020-10-28 14:56:01,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:01,228 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-28 14:56:01,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:56:01,228 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-28 14:56:01,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:56:01,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:01,229 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:01,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:56:01,230 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:01,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:01,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1889806181, now seen corresponding path program 16 times [2020-10-28 14:56:01,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:01,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936059679] [2020-10-28 14:56:01,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:01,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:01,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:01,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:56:01,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:01,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-28 14:56:01,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:01,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:01,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:56:01,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:01,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:56:01,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:02,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:02,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:02,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:02,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:02,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:02,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:56:02,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:02,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:02,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:02,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:02,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:02,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:02,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936059679] [2020-10-28 14:56:02,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:02,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:56:02,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598550792] [2020-10-28 14:56:02,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:56:02,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:02,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:56:02,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:56:02,144 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 20 states. [2020-10-28 14:56:03,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:03,557 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-10-28 14:56:03,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:56:03,562 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-28 14:56:03,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:03,563 INFO L225 Difference]: With dead ends: 87 [2020-10-28 14:56:03,563 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 14:56:03,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:56:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 14:56:03,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-28 14:56:03,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 14:56:03,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-28 14:56:03,575 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 44 [2020-10-28 14:56:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:03,575 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-28 14:56:03,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:56:03,575 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-28 14:56:03,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:56:03,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:03,576 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:03,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:56:03,577 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:03,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:03,578 INFO L82 PathProgramCache]: Analyzing trace with hash 383291488, now seen corresponding path program 17 times [2020-10-28 14:56:03,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:03,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219641462] [2020-10-28 14:56:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:03,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:04,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:04,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:56:04,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:04,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-28 14:56:04,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:04,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:04,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:56:04,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:04,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:56:04,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:04,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:04,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:04,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:04,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:04,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:04,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:56:04,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:04,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:04,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:04,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:04,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:04,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:04,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219641462] [2020-10-28 14:56:04,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:04,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:56:04,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310584239] [2020-10-28 14:56:04,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:56:04,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:04,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:56:04,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:56:04,569 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 21 states. [2020-10-28 14:56:05,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:05,996 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-28 14:56:05,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:56:05,997 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-28 14:56:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:05,999 INFO L225 Difference]: With dead ends: 89 [2020-10-28 14:56:05,999 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 14:56:06,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:56:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 14:56:06,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-28 14:56:06,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 14:56:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-28 14:56:06,010 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 46 [2020-10-28 14:56:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:06,010 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-28 14:56:06,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:56:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-28 14:56:06,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:56:06,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:06,011 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:06,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:56:06,011 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:06,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:06,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1704506814, now seen corresponding path program 9 times [2020-10-28 14:56:06,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:06,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125917779] [2020-10-28 14:56:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:06,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:06,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:06,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:56:06,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:06,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-28 14:56:06,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:06,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:06,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:56:06,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:06,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:56:06,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:06,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:06,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:06,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:06,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:06,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:06,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 14:56:06,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:06,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:06,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:06,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:06,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:06,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:06,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125917779] [2020-10-28 14:56:06,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:06,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:56:06,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168840714] [2020-10-28 14:56:06,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:56:06,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:06,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:56:06,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:56:06,977 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 21 states. [2020-10-28 14:56:08,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:08,643 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-28 14:56:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:56:08,644 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-28 14:56:08,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:08,645 INFO L225 Difference]: With dead ends: 93 [2020-10-28 14:56:08,645 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 14:56:08,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:56:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 14:56:08,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-28 14:56:08,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 14:56:08,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-28 14:56:08,657 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 46 [2020-10-28 14:56:08,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:08,657 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-28 14:56:08,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:56:08,657 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-28 14:56:08,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:56:08,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:08,658 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:08,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:56:08,658 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:08,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:08,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1308202267, now seen corresponding path program 18 times [2020-10-28 14:56:08,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:08,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7176111] [2020-10-28 14:56:08,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:08,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:09,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:09,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:56:09,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:09,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-28 14:56:09,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:09,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:56:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:56:09,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:09,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:09,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:09,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:09,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:09,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:09,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:09,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:09,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:09,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:09,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:09,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:09,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:09,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7176111] [2020-10-28 14:56:09,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:09,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:56:09,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111284061] [2020-10-28 14:56:09,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:56:09,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:09,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:56:09,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:56:09,689 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 22 states. [2020-10-28 14:56:11,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:11,225 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-10-28 14:56:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:56:11,226 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-28 14:56:11,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:11,228 INFO L225 Difference]: With dead ends: 95 [2020-10-28 14:56:11,228 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 14:56:11,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:56:11,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 14:56:11,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-28 14:56:11,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 14:56:11,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-28 14:56:11,239 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 48 [2020-10-28 14:56:11,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:11,239 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-28 14:56:11,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:56:11,240 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-28 14:56:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:56:11,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:11,240 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:11,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:56:11,241 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:11,241 INFO L82 PathProgramCache]: Analyzing trace with hash 958904362, now seen corresponding path program 19 times [2020-10-28 14:56:11,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:11,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550575862] [2020-10-28 14:56:11,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:11,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:11,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:11,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:56:11,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:11,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 539 [2020-10-28 14:56:11,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:11,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:11,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:56:11,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:11,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:56:11,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:12,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:12,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:12,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:12,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:12,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:12,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:56:12,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:12,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:12,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:12,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550575862] [2020-10-28 14:56:12,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:12,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:56:12,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324394497] [2020-10-28 14:56:12,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:56:12,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:12,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:56:12,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:56:12,286 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 23 states. [2020-10-28 14:56:14,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:14,082 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-10-28 14:56:14,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:56:14,083 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-28 14:56:14,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:14,084 INFO L225 Difference]: With dead ends: 97 [2020-10-28 14:56:14,084 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 14:56:14,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:56:14,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 14:56:14,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-28 14:56:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 14:56:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-28 14:56:14,097 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 50 [2020-10-28 14:56:14,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:14,098 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-28 14:56:14,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:56:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-28 14:56:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:56:14,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:14,099 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:14,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:56:14,099 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:14,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1541101052, now seen corresponding path program 10 times [2020-10-28 14:56:14,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:14,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159590052] [2020-10-28 14:56:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:14,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:14,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:14,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:56:14,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:14,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-10-28 14:56:14,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:14,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:14,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:56:14,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:14,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:56:14,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:15,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:15,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:15,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:15,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:15,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:15,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:56:15,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:15,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:15,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:15,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:15,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:15,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:56:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:15,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159590052] [2020-10-28 14:56:15,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:15,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:56:15,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189874757] [2020-10-28 14:56:15,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:56:15,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:15,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:56:15,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:56:15,213 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 23 states. [2020-10-28 14:56:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:17,098 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-28 14:56:17,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:56:17,099 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-28 14:56:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:17,100 INFO L225 Difference]: With dead ends: 101 [2020-10-28 14:56:17,100 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 14:56:17,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:56:17,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 14:56:17,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-28 14:56:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 14:56:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-28 14:56:17,111 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 50 [2020-10-28 14:56:17,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:17,112 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-28 14:56:17,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:56:17,112 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-28 14:56:17,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:56:17,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:17,113 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:17,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:56:17,113 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:17,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:17,113 INFO L82 PathProgramCache]: Analyzing trace with hash 2099955759, now seen corresponding path program 20 times [2020-10-28 14:56:17,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:17,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155459315] [2020-10-28 14:56:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:17,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:17,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:17,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:56:17,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:17,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 668 [2020-10-28 14:56:17,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:17,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:17,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:56:17,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:17,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:56:17,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:18,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:18,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:18,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:18,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:18,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:18,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:56:18,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:18,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:18,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:18,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:18,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:18,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:18,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155459315] [2020-10-28 14:56:18,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:18,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:56:18,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051770636] [2020-10-28 14:56:18,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:56:18,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:18,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:56:18,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:56:18,356 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 24 states. [2020-10-28 14:56:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:20,250 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-10-28 14:56:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:56:20,251 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-28 14:56:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:20,252 INFO L225 Difference]: With dead ends: 103 [2020-10-28 14:56:20,252 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 14:56:20,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:56:20,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 14:56:20,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-28 14:56:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 14:56:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-28 14:56:20,262 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 52 [2020-10-28 14:56:20,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:20,262 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-28 14:56:20,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:56:20,262 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-28 14:56:20,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:56:20,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:20,263 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:20,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:56:20,263 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:20,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:20,264 INFO L82 PathProgramCache]: Analyzing trace with hash -861279500, now seen corresponding path program 21 times [2020-10-28 14:56:20,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:20,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092857769] [2020-10-28 14:56:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:20,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:20,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:20,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:56:20,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:20,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-28 14:56:20,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:20,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:56:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:56:20,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:21,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:21,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:21,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:21,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:21,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:21,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:56:21,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:21,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:21,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:21,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:21,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:21,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:21,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092857769] [2020-10-28 14:56:21,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:21,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:56:21,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742808614] [2020-10-28 14:56:21,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:56:21,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:21,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:56:21,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:56:21,590 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 25 states. [2020-10-28 14:56:23,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:23,513 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-10-28 14:56:23,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:56:23,514 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-28 14:56:23,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:23,515 INFO L225 Difference]: With dead ends: 105 [2020-10-28 14:56:23,515 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 14:56:23,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:56:23,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 14:56:23,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-28 14:56:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 14:56:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-28 14:56:23,525 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 54 [2020-10-28 14:56:23,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:23,525 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-28 14:56:23,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:56:23,525 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-28 14:56:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:56:23,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:23,526 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:23,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:56:23,526 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:23,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:23,527 INFO L82 PathProgramCache]: Analyzing trace with hash 393284426, now seen corresponding path program 11 times [2020-10-28 14:56:23,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:23,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432076409] [2020-10-28 14:56:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:23,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:24,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:24,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:56:24,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:24,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 634 [2020-10-28 14:56:24,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:24,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:24,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:56:24,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:24,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:56:24,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:24,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:24,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:24,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:24,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:24,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:24,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:56:24,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:24,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:24,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:24,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:24,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:24,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:24,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432076409] [2020-10-28 14:56:24,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:24,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:56:24,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025442007] [2020-10-28 14:56:24,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:56:24,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:24,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:56:24,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:56:24,770 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 25 states. [2020-10-28 14:56:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:26,951 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2020-10-28 14:56:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:56:26,952 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-28 14:56:26,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:26,953 INFO L225 Difference]: With dead ends: 109 [2020-10-28 14:56:26,954 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 14:56:26,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:56:26,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 14:56:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-28 14:56:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 14:56:26,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-28 14:56:26,971 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 54 [2020-10-28 14:56:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:26,971 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-28 14:56:26,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:56:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-28 14:56:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 14:56:26,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:26,972 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:26,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:56:26,972 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:26,973 INFO L82 PathProgramCache]: Analyzing trace with hash 954953849, now seen corresponding path program 22 times [2020-10-28 14:56:26,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:26,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221598238] [2020-10-28 14:56:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:26,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:27,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:27,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 14:56:27,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:27,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-28 14:56:27,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:27,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:27,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:56:27,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:27,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:56:27,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:28,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:28,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:28,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:28,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:28,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:28,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:56:28,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:28,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:28,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:28,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221598238] [2020-10-28 14:56:28,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:28,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:56:28,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623105340] [2020-10-28 14:56:28,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:56:28,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:28,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:56:28,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:56:28,182 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 26 states. [2020-10-28 14:56:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:30,300 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-10-28 14:56:30,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:56:30,303 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-28 14:56:30,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:30,304 INFO L225 Difference]: With dead ends: 111 [2020-10-28 14:56:30,304 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 14:56:30,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 14:56:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 14:56:30,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-28 14:56:30,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 14:56:30,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-28 14:56:30,313 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 56 [2020-10-28 14:56:30,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:30,313 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-28 14:56:30,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:56:30,314 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-28 14:56:30,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 14:56:30,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:30,314 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:30,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:56:30,314 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:30,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:30,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1696487234, now seen corresponding path program 23 times [2020-10-28 14:56:30,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:30,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046967377] [2020-10-28 14:56:30,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:30,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:30,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:30,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 14:56:30,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:30,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-28 14:56:30,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:30,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:30,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:56:30,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:30,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 14:56:30,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:31,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:31,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:31,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:31,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:31,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:31,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:31,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:31,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:31,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:31,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:31,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046967377] [2020-10-28 14:56:31,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:31,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:56:31,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600725205] [2020-10-28 14:56:31,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:56:31,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:31,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:56:31,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:56:31,611 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 27 states. [2020-10-28 14:56:34,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:34,005 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2020-10-28 14:56:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:56:34,006 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-28 14:56:34,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:34,007 INFO L225 Difference]: With dead ends: 113 [2020-10-28 14:56:34,008 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 14:56:34,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 14:56:34,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 14:56:34,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-28 14:56:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 14:56:34,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-28 14:56:34,019 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 58 [2020-10-28 14:56:34,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:34,019 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-28 14:56:34,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:56:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-28 14:56:34,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 14:56:34,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:34,020 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:34,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:56:34,020 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:34,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:34,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1602181520, now seen corresponding path program 12 times [2020-10-28 14:56:34,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:34,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152443356] [2020-10-28 14:56:34,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:34,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:34,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:34,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 14:56:34,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:34,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 661 [2020-10-28 14:56:34,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:34,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:34,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:56:34,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:34,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 14:56:34,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:35,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:35,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:35,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:35,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:35,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:35,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:35,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:35,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:35,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:35,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:35,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:35,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:35,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152443356] [2020-10-28 14:56:35,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:35,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:56:35,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876942699] [2020-10-28 14:56:35,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:56:35,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:35,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:56:35,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:56:35,406 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 27 states. [2020-10-28 14:56:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:37,841 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2020-10-28 14:56:37,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:56:37,842 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-28 14:56:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:37,843 INFO L225 Difference]: With dead ends: 117 [2020-10-28 14:56:37,843 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 14:56:37,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 14:56:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 14:56:37,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-28 14:56:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 14:56:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-28 14:56:37,857 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 58 [2020-10-28 14:56:37,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:37,857 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-28 14:56:37,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:56:37,857 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-28 14:56:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:56:37,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:37,858 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:37,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:56:37,858 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:37,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:37,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1479205827, now seen corresponding path program 24 times [2020-10-28 14:56:37,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:37,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209386488] [2020-10-28 14:56:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:37,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:38,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:38,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:56:38,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:38,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-28 14:56:38,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:38,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:38,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:56:38,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:38,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 14:56:38,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:39,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:39,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:39,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:39,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:39,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:39,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:56:39,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:39,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:39,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:39,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:39,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:39,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:39,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209386488] [2020-10-28 14:56:39,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:39,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 14:56:39,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222162085] [2020-10-28 14:56:39,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 14:56:39,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:39,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 14:56:39,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:56:39,267 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 28 states. [2020-10-28 14:56:41,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:41,810 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2020-10-28 14:56:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:56:41,810 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-28 14:56:41,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:41,812 INFO L225 Difference]: With dead ends: 119 [2020-10-28 14:56:41,812 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 14:56:41,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:56:41,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 14:56:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-28 14:56:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 14:56:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-28 14:56:41,825 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 60 [2020-10-28 14:56:41,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:41,825 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-28 14:56:41,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 14:56:41,826 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-28 14:56:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:56:41,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:41,826 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:41,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:56:41,827 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:41,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:41,827 INFO L82 PathProgramCache]: Analyzing trace with hash -401510008, now seen corresponding path program 25 times [2020-10-28 14:56:41,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:41,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215176589] [2020-10-28 14:56:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:41,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:42,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:42,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 14:56:42,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:42,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 802 [2020-10-28 14:56:42,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:42,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:42,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 14:56:42,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:42,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 14:56:42,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:43,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:43,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:43,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:43,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:43,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:43,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:43,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:43,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:43,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:43,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:43,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:43,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:43,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215176589] [2020-10-28 14:56:43,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:43,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 14:56:43,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029822002] [2020-10-28 14:56:43,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 14:56:43,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:43,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 14:56:43,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:56:43,423 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 29 states. [2020-10-28 14:56:46,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:46,041 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2020-10-28 14:56:46,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:56:46,041 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-28 14:56:46,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:46,043 INFO L225 Difference]: With dead ends: 121 [2020-10-28 14:56:46,043 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 14:56:46,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 14:56:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 14:56:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-28 14:56:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 14:56:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-28 14:56:46,056 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 62 [2020-10-28 14:56:46,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:46,056 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-28 14:56:46,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 14:56:46,057 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-28 14:56:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:56:46,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:46,057 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:46,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:56:46,058 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:46,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:46,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1066472662, now seen corresponding path program 13 times [2020-10-28 14:56:46,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:46,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27793748] [2020-10-28 14:56:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:46,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:46,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:46,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 14:56:46,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:46,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 788 [2020-10-28 14:56:46,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:46,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 14:56:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 14:56:46,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:47,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:47,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:47,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:47,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:47,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:47,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:47,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:47,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:47,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:47,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:47,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:47,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:47,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27793748] [2020-10-28 14:56:47,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:47,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 14:56:47,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469106989] [2020-10-28 14:56:47,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 14:56:47,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:47,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 14:56:47,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:56:47,699 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 29 states. [2020-10-28 14:56:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:50,731 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2020-10-28 14:56:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:56:50,731 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-28 14:56:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:50,733 INFO L225 Difference]: With dead ends: 125 [2020-10-28 14:56:50,733 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 14:56:50,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 14:56:50,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 14:56:50,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-28 14:56:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 14:56:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-28 14:56:50,745 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 62 [2020-10-28 14:56:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:50,745 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-28 14:56:50,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 14:56:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-28 14:56:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 14:56:50,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:50,746 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:50,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:56:50,746 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:50,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:50,747 INFO L82 PathProgramCache]: Analyzing trace with hash 411804173, now seen corresponding path program 26 times [2020-10-28 14:56:50,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:50,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793293844] [2020-10-28 14:56:50,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:50,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:51,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:51,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 14:56:51,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:51,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-28 14:56:51,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:51,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:51,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:56:51,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:51,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 14:56:51,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:52,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:52,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:52,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:52,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:52,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:52,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:52,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:52,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:52,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:52,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:52,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:52,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:52,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793293844] [2020-10-28 14:56:52,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:52,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 14:56:52,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636090950] [2020-10-28 14:56:52,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 14:56:52,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:52,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 14:56:52,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:56:52,487 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 30 states. [2020-10-28 14:56:55,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:55,375 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2020-10-28 14:56:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:56:55,376 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-28 14:56:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:55,378 INFO L225 Difference]: With dead ends: 127 [2020-10-28 14:56:55,378 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 14:56:55,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 14:56:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 14:56:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-28 14:56:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 14:56:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-10-28 14:56:55,392 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 64 [2020-10-28 14:56:55,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:55,392 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-10-28 14:56:55,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 14:56:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-10-28 14:56:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 14:56:55,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:55,393 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:55,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:56:55,394 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:55,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:55,394 INFO L82 PathProgramCache]: Analyzing trace with hash 322684242, now seen corresponding path program 27 times [2020-10-28 14:56:55,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:55,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351243835] [2020-10-28 14:56:55,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:55,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:56,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:56,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:56:56,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:56,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1036 [2020-10-28 14:56:56,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:56,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:56,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:56:56,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:56,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 14:56:56,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:57,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:57,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:57,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:57,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:57,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:57,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:57,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:57,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:57,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:57,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:57,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:57,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:57,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351243835] [2020-10-28 14:56:57,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:57,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 14:56:57,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553949891] [2020-10-28 14:56:57,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 14:56:57,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:57,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 14:56:57,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:56:57,327 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 31 states. [2020-10-28 14:57:00,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:00,317 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2020-10-28 14:57:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:57:00,320 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-28 14:57:00,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:00,320 INFO L225 Difference]: With dead ends: 129 [2020-10-28 14:57:00,321 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 14:57:00,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 14:57:00,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 14:57:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-28 14:57:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 14:57:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-10-28 14:57:00,334 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 66 [2020-10-28 14:57:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:00,334 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-10-28 14:57:00,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 14:57:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-10-28 14:57:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 14:57:00,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:00,335 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:00,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:57:00,335 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:00,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:00,336 INFO L82 PathProgramCache]: Analyzing trace with hash -30950116, now seen corresponding path program 14 times [2020-10-28 14:57:00,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:00,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269983349] [2020-10-28 14:57:00,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:00,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:01,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:01,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:57:01,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:01,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 774 [2020-10-28 14:57:01,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:01,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:01,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:57:01,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:01,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 14:57:01,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:01,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:01,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:02,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:02,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:02,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:02,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:02,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:02,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:02,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:02,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269983349] [2020-10-28 14:57:02,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:02,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 14:57:02,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960449784] [2020-10-28 14:57:02,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 14:57:02,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:02,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 14:57:02,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:57:02,013 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 31 states. [2020-10-28 14:57:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:05,446 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2020-10-28 14:57:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:57:05,446 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-28 14:57:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:05,447 INFO L225 Difference]: With dead ends: 133 [2020-10-28 14:57:05,448 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 14:57:05,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 14:57:05,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 14:57:05,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-28 14:57:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 14:57:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-28 14:57:05,460 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 66 [2020-10-28 14:57:05,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:05,461 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-28 14:57:05,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 14:57:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-28 14:57:05,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 14:57:05,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:05,462 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:05,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:57:05,462 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:05,462 INFO L82 PathProgramCache]: Analyzing trace with hash 577776471, now seen corresponding path program 28 times [2020-10-28 14:57:05,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:05,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137884962] [2020-10-28 14:57:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:05,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:06,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:06,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 14:57:06,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:06,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 775 [2020-10-28 14:57:06,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:06,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:06,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 14:57:06,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:06,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 14:57:06,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:07,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:07,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:07,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:07,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:07,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:07,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:07,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:07,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:07,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:07,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:07,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:07,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:07,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137884962] [2020-10-28 14:57:07,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:07,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 14:57:07,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63391952] [2020-10-28 14:57:07,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 14:57:07,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 14:57:07,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:57:07,190 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 32 states. [2020-10-28 14:57:10,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:10,428 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2020-10-28 14:57:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 14:57:10,429 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-28 14:57:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:10,430 INFO L225 Difference]: With dead ends: 135 [2020-10-28 14:57:10,430 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:57:10,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 14:57:10,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:57:10,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-28 14:57:10,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-28 14:57:10,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-10-28 14:57:10,444 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 68 [2020-10-28 14:57:10,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:10,445 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-10-28 14:57:10,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 14:57:10,445 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-10-28 14:57:10,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 14:57:10,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:10,446 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:10,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:57:10,446 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:10,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:10,446 INFO L82 PathProgramCache]: Analyzing trace with hash 908272668, now seen corresponding path program 29 times [2020-10-28 14:57:10,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:10,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789707438] [2020-10-28 14:57:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:10,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:11,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:11,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 14:57:11,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:11,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-28 14:57:11,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:11,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:11,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 14:57:11,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:11,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 14:57:11,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:12,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:12,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:12,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:12,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:12,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:12,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:12,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:12,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:12,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:12,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:12,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:12,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:12,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789707438] [2020-10-28 14:57:12,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:12,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 14:57:12,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993807597] [2020-10-28 14:57:12,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 14:57:12,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:12,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 14:57:12,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:57:12,216 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 33 states. [2020-10-28 14:57:15,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:15,628 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2020-10-28 14:57:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 14:57:15,629 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-28 14:57:15,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:15,630 INFO L225 Difference]: With dead ends: 137 [2020-10-28 14:57:15,631 INFO L226 Difference]: Without dead ends: 131 [2020-10-28 14:57:15,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 14:57:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-28 14:57:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-28 14:57:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 14:57:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-10-28 14:57:15,642 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 70 [2020-10-28 14:57:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:15,642 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-10-28 14:57:15,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 14:57:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-10-28 14:57:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 14:57:15,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:15,643 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:15,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:57:15,643 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:15,644 INFO L82 PathProgramCache]: Analyzing trace with hash -989539742, now seen corresponding path program 15 times [2020-10-28 14:57:15,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:15,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956693197] [2020-10-28 14:57:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:15,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:16,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:16,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 14:57:16,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:16,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-28 14:57:16,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:16,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:16,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 14:57:16,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:16,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 14:57:16,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:17,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:17,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:17,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:17,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:17,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:17,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:17,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:17,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:17,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:17,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:17,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:17,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:17,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956693197] [2020-10-28 14:57:17,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:17,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 14:57:17,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351625114] [2020-10-28 14:57:17,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 14:57:17,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:17,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 14:57:17,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:57:17,332 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 33 states. [2020-10-28 14:57:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:21,269 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2020-10-28 14:57:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 14:57:21,270 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-28 14:57:21,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:21,271 INFO L225 Difference]: With dead ends: 141 [2020-10-28 14:57:21,272 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 14:57:21,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 14:57:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 14:57:21,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-28 14:57:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-28 14:57:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-10-28 14:57:21,289 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 70 [2020-10-28 14:57:21,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:21,289 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-10-28 14:57:21,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 14:57:21,289 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-10-28 14:57:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 14:57:21,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:21,290 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:21,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:57:21,290 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:21,291 INFO L82 PathProgramCache]: Analyzing trace with hash 687538081, now seen corresponding path program 30 times [2020-10-28 14:57:21,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:21,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683271948] [2020-10-28 14:57:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:21,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:22,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:22,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 14:57:22,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:22,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 905 [2020-10-28 14:57:22,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:22,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:22,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 14:57:22,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:22,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 14:57:22,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:23,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:23,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:23,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:23,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:23,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:23,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:23,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:23,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:23,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:23,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:23,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:23,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:23,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683271948] [2020-10-28 14:57:23,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:23,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 14:57:23,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700152626] [2020-10-28 14:57:23,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 14:57:23,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:23,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 14:57:23,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:57:23,266 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 34 states. [2020-10-28 14:57:26,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:26,878 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2020-10-28 14:57:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 14:57:26,879 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-10-28 14:57:26,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:26,880 INFO L225 Difference]: With dead ends: 143 [2020-10-28 14:57:26,881 INFO L226 Difference]: Without dead ends: 137 [2020-10-28 14:57:26,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 14:57:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-28 14:57:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-28 14:57:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-28 14:57:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2020-10-28 14:57:26,896 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 72 [2020-10-28 14:57:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:26,896 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2020-10-28 14:57:26,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 14:57:26,896 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2020-10-28 14:57:26,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 14:57:26,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:26,897 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:26,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:57:26,898 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:26,898 INFO L82 PathProgramCache]: Analyzing trace with hash -985002522, now seen corresponding path program 31 times [2020-10-28 14:57:26,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:26,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543139315] [2020-10-28 14:57:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:26,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:28,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:28,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 14:57:28,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:28,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1117 [2020-10-28 14:57:28,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:28,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:28,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 14:57:28,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:28,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 14:57:28,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:29,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:29,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:29,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:29,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:29,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:29,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:29,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:29,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:29,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:29,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:29,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:29,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:29,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543139315] [2020-10-28 14:57:29,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:29,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 14:57:29,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974808980] [2020-10-28 14:57:29,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 14:57:29,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:29,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 14:57:29,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:57:29,231 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 35 states. [2020-10-28 14:57:33,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:33,346 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2020-10-28 14:57:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 14:57:33,347 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-28 14:57:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:33,348 INFO L225 Difference]: With dead ends: 145 [2020-10-28 14:57:33,348 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 14:57:33,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 14:57:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 14:57:33,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-28 14:57:33,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 14:57:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-10-28 14:57:33,363 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 74 [2020-10-28 14:57:33,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:33,364 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-10-28 14:57:33,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 14:57:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-10-28 14:57:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 14:57:33,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:33,365 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:33,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:57:33,365 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:33,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:33,365 INFO L82 PathProgramCache]: Analyzing trace with hash 19518632, now seen corresponding path program 16 times [2020-10-28 14:57:33,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:33,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762896046] [2020-10-28 14:57:33,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:33,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:34,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:34,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 14:57:34,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:34,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 930 [2020-10-28 14:57:34,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:34,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:34,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 14:57:34,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:34,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 14:57:34,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:35,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:35,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:35,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:35,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:35,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:35,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:35,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:35,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:35,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:35,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762896046] [2020-10-28 14:57:35,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:35,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 14:57:35,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907167518] [2020-10-28 14:57:35,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 14:57:35,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:35,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 14:57:35,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:57:35,503 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 35 states. [2020-10-28 14:57:40,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:40,136 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2020-10-28 14:57:40,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 14:57:40,137 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-28 14:57:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:40,139 INFO L225 Difference]: With dead ends: 149 [2020-10-28 14:57:40,139 INFO L226 Difference]: Without dead ends: 143 [2020-10-28 14:57:40,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 14:57:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-28 14:57:40,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-28 14:57:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 14:57:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2020-10-28 14:57:40,152 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 74 [2020-10-28 14:57:40,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:40,152 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2020-10-28 14:57:40,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 14:57:40,152 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2020-10-28 14:57:40,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 14:57:40,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:40,153 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:40,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 14:57:40,154 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:40,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:40,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1978753301, now seen corresponding path program 32 times [2020-10-28 14:57:40,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:40,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736316757] [2020-10-28 14:57:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:40,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:41,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:41,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 14:57:41,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:41,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1521 [2020-10-28 14:57:41,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:41,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:41,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 14:57:41,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:41,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 14:57:41,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:42,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:42,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:42,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:42,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:42,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:42,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:42,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:42,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:42,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:42,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:42,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:42,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:42,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736316757] [2020-10-28 14:57:42,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:42,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 14:57:42,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781719371] [2020-10-28 14:57:42,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 14:57:42,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:42,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 14:57:42,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:57:42,951 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 36 states. [2020-10-28 14:57:47,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:47,236 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2020-10-28 14:57:47,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 14:57:47,237 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-10-28 14:57:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:47,238 INFO L225 Difference]: With dead ends: 151 [2020-10-28 14:57:47,238 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 14:57:47,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 14:57:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 14:57:47,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-10-28 14:57:47,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 14:57:47,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-10-28 14:57:47,253 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 76 [2020-10-28 14:57:47,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:47,254 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-10-28 14:57:47,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 14:57:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-10-28 14:57:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 14:57:47,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:47,255 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:47,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 14:57:47,255 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:47,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:47,256 INFO L82 PathProgramCache]: Analyzing trace with hash 804455088, now seen corresponding path program 33 times [2020-10-28 14:57:47,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:47,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143652111] [2020-10-28 14:57:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:47,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:48,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:48,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 14:57:48,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:48,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1061 [2020-10-28 14:57:48,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:48,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 14:57:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 14:57:48,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:49,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:49,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:49,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:49,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:49,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:49,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:49,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:49,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:49,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:49,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:49,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:49,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:49,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143652111] [2020-10-28 14:57:49,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:49,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 14:57:49,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184014271] [2020-10-28 14:57:49,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 14:57:49,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:49,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 14:57:49,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:57:49,645 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 37 states. [2020-10-28 14:57:54,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:54,063 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2020-10-28 14:57:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 14:57:54,064 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-28 14:57:54,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:54,065 INFO L225 Difference]: With dead ends: 153 [2020-10-28 14:57:54,065 INFO L226 Difference]: Without dead ends: 147 [2020-10-28 14:57:54,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 14:57:54,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-28 14:57:54,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-10-28 14:57:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-28 14:57:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2020-10-28 14:57:54,080 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 78 [2020-10-28 14:57:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:54,081 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2020-10-28 14:57:54,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 14:57:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2020-10-28 14:57:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 14:57:54,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:54,082 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:54,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 14:57:54,082 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:54,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1026014226, now seen corresponding path program 17 times [2020-10-28 14:57:54,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:54,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866879194] [2020-10-28 14:57:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:54,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:55,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:55,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 14:57:55,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:55,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1034 [2020-10-28 14:57:55,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:55,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:55,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 14:57:55,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:55,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 14:57:55,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:56,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:56,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:56,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:56,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:56,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:56,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:56,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:56,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:56,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:56,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:56,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:56,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:56,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866879194] [2020-10-28 14:57:56,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:56,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 14:57:56,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607432497] [2020-10-28 14:57:56,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 14:57:56,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:56,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 14:57:56,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:57:56,434 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 37 states. [2020-10-28 14:58:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:01,356 INFO L93 Difference]: Finished difference Result 157 states and 159 transitions. [2020-10-28 14:58:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 14:58:01,357 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-28 14:58:01,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:01,359 INFO L225 Difference]: With dead ends: 157 [2020-10-28 14:58:01,359 INFO L226 Difference]: Without dead ends: 151 [2020-10-28 14:58:01,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 14:58:01,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-28 14:58:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2020-10-28 14:58:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 14:58:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-10-28 14:58:01,371 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 78 [2020-10-28 14:58:01,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:01,371 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-10-28 14:58:01,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 14:58:01,371 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-10-28 14:58:01,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 14:58:01,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:01,372 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:01,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 14:58:01,372 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:01,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:01,373 INFO L82 PathProgramCache]: Analyzing trace with hash -296908491, now seen corresponding path program 34 times [2020-10-28 14:58:01,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:01,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608034767] [2020-10-28 14:58:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:01,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:02,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:02,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 14:58:02,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:02,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1407 [2020-10-28 14:58:02,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:02,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:02,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 14:58:02,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:02,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 14:58:02,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:04,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:04,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:04,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:04,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:04,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:04,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:04,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:04,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:04,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:04,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:04,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:04,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:04,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608034767] [2020-10-28 14:58:04,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:04,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 14:58:04,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208951579] [2020-10-28 14:58:04,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 14:58:04,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:04,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 14:58:04,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:58:04,204 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 38 states. [2020-10-28 14:58:08,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:08,951 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2020-10-28 14:58:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 14:58:08,952 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-10-28 14:58:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:08,954 INFO L225 Difference]: With dead ends: 159 [2020-10-28 14:58:08,954 INFO L226 Difference]: Without dead ends: 153 [2020-10-28 14:58:08,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-28 14:58:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-28 14:58:08,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-10-28 14:58:08,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-28 14:58:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2020-10-28 14:58:08,967 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 80 [2020-10-28 14:58:08,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:08,968 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2020-10-28 14:58:08,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 14:58:08,968 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2020-10-28 14:58:08,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 14:58:08,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:08,969 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:08,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 14:58:08,969 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:08,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:08,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2145353094, now seen corresponding path program 35 times [2020-10-28 14:58:08,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:08,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929947538] [2020-10-28 14:58:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:08,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:10,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:10,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 14:58:10,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:10,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1196 [2020-10-28 14:58:10,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:10,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:10,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 14:58:10,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:10,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 14:58:10,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:11,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:11,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:11,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:11,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:11,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:11,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:11,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:11,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:11,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:11,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:11,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:11,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:11,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929947538] [2020-10-28 14:58:11,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:11,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 14:58:11,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289031402] [2020-10-28 14:58:11,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 14:58:11,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:11,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 14:58:11,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:58:11,610 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand 39 states. [2020-10-28 14:58:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:16,380 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2020-10-28 14:58:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 14:58:16,381 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-28 14:58:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:16,382 INFO L225 Difference]: With dead ends: 161 [2020-10-28 14:58:16,382 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 14:58:16,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 14:58:16,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 14:58:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-10-28 14:58:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 14:58:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-10-28 14:58:16,396 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 82 [2020-10-28 14:58:16,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:16,396 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-10-28 14:58:16,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 14:58:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-10-28 14:58:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 14:58:16,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:16,397 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:16,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 14:58:16,398 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:16,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:16,398 INFO L82 PathProgramCache]: Analyzing trace with hash 496082996, now seen corresponding path program 18 times [2020-10-28 14:58:16,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:16,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601925650] [2020-10-28 14:58:16,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:16,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:17,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:17,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 14:58:17,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:17,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1052 [2020-10-28 14:58:17,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:17,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:17,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 14:58:17,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:17,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 14:58:17,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:18,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:18,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:18,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:18,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:18,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:18,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:18,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:18,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:18,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:18,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:18,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:18,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:18,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601925650] [2020-10-28 14:58:18,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:18,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 14:58:18,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907813478] [2020-10-28 14:58:18,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 14:58:18,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:18,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 14:58:18,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:58:18,926 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 39 states. [2020-10-28 14:58:24,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:24,281 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2020-10-28 14:58:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 14:58:24,282 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-28 14:58:24,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:24,284 INFO L225 Difference]: With dead ends: 165 [2020-10-28 14:58:24,284 INFO L226 Difference]: Without dead ends: 159 [2020-10-28 14:58:24,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 14:58:24,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-28 14:58:24,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-10-28 14:58:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-28 14:58:24,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2020-10-28 14:58:24,297 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 82 [2020-10-28 14:58:24,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:24,297 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2020-10-28 14:58:24,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 14:58:24,298 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2020-10-28 14:58:24,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 14:58:24,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:24,298 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:24,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 14:58:24,299 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:24,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:24,299 INFO L82 PathProgramCache]: Analyzing trace with hash -384156033, now seen corresponding path program 36 times [2020-10-28 14:58:24,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:24,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222352775] [2020-10-28 14:58:24,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:24,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:25,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:25,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 14:58:25,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:25,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1262 [2020-10-28 14:58:25,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:25,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:25,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 14:58:25,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:25,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 14:58:25,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:27,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:27,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:27,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:27,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:27,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:27,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:27,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:27,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:27,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:27,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:27,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:27,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:27,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222352775] [2020-10-28 14:58:27,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:27,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 14:58:27,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521630448] [2020-10-28 14:58:27,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 14:58:27,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:27,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 14:58:27,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:58:27,108 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 40 states. [2020-10-28 14:58:32,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:32,285 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2020-10-28 14:58:32,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 14:58:32,286 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-10-28 14:58:32,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:32,287 INFO L225 Difference]: With dead ends: 167 [2020-10-28 14:58:32,288 INFO L226 Difference]: Without dead ends: 161 [2020-10-28 14:58:32,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 14:58:32,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-28 14:58:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-28 14:58:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-28 14:58:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2020-10-28 14:58:32,301 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 84 [2020-10-28 14:58:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:32,301 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2020-10-28 14:58:32,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 14:58:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2020-10-28 14:58:32,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 14:58:32,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:32,302 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:32,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-28 14:58:32,302 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:32,303 INFO L82 PathProgramCache]: Analyzing trace with hash -90895036, now seen corresponding path program 37 times [2020-10-28 14:58:32,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:32,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306346437] [2020-10-28 14:58:32,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:32,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:33,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:33,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 14:58:33,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:33,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1242 [2020-10-28 14:58:33,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:33,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:33,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 14:58:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 14:58:33,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:35,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:35,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:35,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:35,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:35,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:35,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:35,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:35,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:35,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:35,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:35,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306346437] [2020-10-28 14:58:35,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:35,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 14:58:35,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449703326] [2020-10-28 14:58:35,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 14:58:35,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:35,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 14:58:35,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:58:35,093 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 41 states. [2020-10-28 14:58:40,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:40,485 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2020-10-28 14:58:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 14:58:40,486 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-28 14:58:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:40,488 INFO L225 Difference]: With dead ends: 169 [2020-10-28 14:58:40,488 INFO L226 Difference]: Without dead ends: 163 [2020-10-28 14:58:40,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-28 14:58:40,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-28 14:58:40,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-10-28 14:58:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 14:58:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2020-10-28 14:58:40,502 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 86 [2020-10-28 14:58:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:40,502 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2020-10-28 14:58:40,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 14:58:40,502 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2020-10-28 14:58:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 14:58:40,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:40,503 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:40,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-28 14:58:40,503 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:40,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2011731590, now seen corresponding path program 19 times [2020-10-28 14:58:40,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:40,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712086821] [2020-10-28 14:58:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:40,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:41,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:41,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 14:58:41,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:41,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1132 [2020-10-28 14:58:41,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:41,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:41,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 14:58:41,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:41,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 14:58:41,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:43,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:43,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:43,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:43,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:43,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:43,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:43,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:43,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:43,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:43,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:43,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:43,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:43,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712086821] [2020-10-28 14:58:43,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:43,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 14:58:43,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715711876] [2020-10-28 14:58:43,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 14:58:43,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:43,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 14:58:43,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:58:43,217 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand 41 states. [2020-10-28 14:58:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:49,011 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2020-10-28 14:58:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 14:58:49,011 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-28 14:58:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:49,013 INFO L225 Difference]: With dead ends: 173 [2020-10-28 14:58:49,013 INFO L226 Difference]: Without dead ends: 167 [2020-10-28 14:58:49,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-28 14:58:49,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-28 14:58:49,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-28 14:58:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-28 14:58:49,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2020-10-28 14:58:49,029 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 86 [2020-10-28 14:58:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:49,029 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2020-10-28 14:58:49,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 14:58:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2020-10-28 14:58:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 14:58:49,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:49,030 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:49,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-28 14:58:49,030 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:49,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:49,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1734918455, now seen corresponding path program 38 times [2020-10-28 14:58:49,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:49,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555467444] [2020-10-28 14:58:49,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:49,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:50,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:50,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 14:58:50,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:50,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1523 [2020-10-28 14:58:50,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:50,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:50,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 14:58:50,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:50,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 14:58:50,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:52,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:52,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:52,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:52,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:52,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:52,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:52,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:52,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:52,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:52,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:52,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:52,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:52,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555467444] [2020-10-28 14:58:52,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:52,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 14:58:52,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005243800] [2020-10-28 14:58:52,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 14:58:52,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:52,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 14:58:52,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:58:52,259 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 42 states. [2020-10-28 14:58:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:57,783 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2020-10-28 14:58:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 14:58:57,784 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-10-28 14:58:57,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:57,785 INFO L225 Difference]: With dead ends: 175 [2020-10-28 14:58:57,786 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 14:58:57,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-28 14:58:57,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 14:58:57,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2020-10-28 14:58:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-28 14:58:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2020-10-28 14:58:57,801 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 88 [2020-10-28 14:58:57,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:57,801 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2020-10-28 14:58:57,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 14:58:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2020-10-28 14:58:57,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 14:58:57,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:57,802 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:57,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-28 14:58:57,802 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:57,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:57,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1093459186, now seen corresponding path program 39 times [2020-10-28 14:58:57,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:57,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049657017] [2020-10-28 14:58:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:57,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:59,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:59,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 14:58:59,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:59,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1391 [2020-10-28 14:58:59,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:59,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:59,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 14:58:59,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:59,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 14:58:59,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:00,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:00,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:00,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:00,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:00,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:00,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:59:00,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:00,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:00,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:00,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:00,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:00,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:59:00,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049657017] [2020-10-28 14:59:00,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:00,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 14:59:00,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341901356] [2020-10-28 14:59:00,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 14:59:00,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:00,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 14:59:00,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:59:00,911 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 43 states. [2020-10-28 14:59:06,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:06,684 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2020-10-28 14:59:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 14:59:06,685 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-28 14:59:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:06,687 INFO L225 Difference]: With dead ends: 177 [2020-10-28 14:59:06,687 INFO L226 Difference]: Without dead ends: 171 [2020-10-28 14:59:06,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-28 14:59:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-28 14:59:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2020-10-28 14:59:06,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-28 14:59:06,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2020-10-28 14:59:06,705 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 90 [2020-10-28 14:59:06,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:06,705 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2020-10-28 14:59:06,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 14:59:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2020-10-28 14:59:06,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 14:59:06,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:06,706 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:06,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-28 14:59:06,707 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:06,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:06,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1013653440, now seen corresponding path program 20 times [2020-10-28 14:59:06,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:06,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174492687] [2020-10-28 14:59:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:06,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:07,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:07,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 14:59:07,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:07,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1260 [2020-10-28 14:59:07,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:07,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:07,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 14:59:07,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:07,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 14:59:07,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:09,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:09,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:09,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:09,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:09,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:09,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:09,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:09,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:09,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:09,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:09,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:59:09,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174492687] [2020-10-28 14:59:09,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:09,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 14:59:09,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059282871] [2020-10-28 14:59:09,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 14:59:09,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:09,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 14:59:09,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:59:09,672 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 43 states. [2020-10-28 14:59:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:16,197 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2020-10-28 14:59:16,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 14:59:16,198 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-28 14:59:16,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:16,200 INFO L225 Difference]: With dead ends: 181 [2020-10-28 14:59:16,200 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 14:59:16,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-28 14:59:16,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 14:59:16,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2020-10-28 14:59:16,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 14:59:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2020-10-28 14:59:16,217 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 90 [2020-10-28 14:59:16,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:16,217 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2020-10-28 14:59:16,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 14:59:16,217 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2020-10-28 14:59:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 14:59:16,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:16,218 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:16,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-28 14:59:16,219 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:16,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:16,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1168574995, now seen corresponding path program 40 times [2020-10-28 14:59:16,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:16,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591593192] [2020-10-28 14:59:16,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:16,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:17,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:17,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 14:59:17,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:17,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1452 [2020-10-28 14:59:17,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:17,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:17,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 14:59:17,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:17,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 14:59:17,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0