/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-lopstr16/break-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:47:42,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:47:43,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:47:43,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:47:43,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:47:43,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:47:43,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:47:43,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:47:43,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:47:43,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:47:43,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:47:43,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:47:43,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:47:43,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:47:43,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:47:43,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:47:43,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:47:43,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:47:43,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:47:43,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:47:43,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:47:43,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:47:43,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:47:43,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:47:43,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:47:43,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:47:43,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:47:43,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:47:43,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:47:43,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:47:43,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:47:43,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:47:43,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:47:43,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:47:43,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:47:43,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:47:43,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:47:43,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:47:43,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:47:43,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:47:43,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:47:43,132 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:47:43,163 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:47:43,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:47:43,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:47:43,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:47:43,167 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:47:43,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:47:43,167 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:47:43,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:47:43,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:47:43,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:47:43,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:47:43,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:47:43,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:47:43,169 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:47:43,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:47:43,170 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:47:43,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:47:43,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:47:43,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:47:43,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:47:43,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:47:43,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:47:43,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:47:43,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:47:43,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:47:43,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:47:43,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:47:43,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:47:43,174 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:47:43,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:47:43,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:47:43,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:47:43,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:47:43,647 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:47:43,652 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:47:43,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/break-1.i [2020-10-26 19:47:43,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f989f14fe/a6b7529ddc4445b98674a3c4db2e224b/FLAGfc4d645cc [2020-10-26 19:47:44,536 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:47:44,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/break-1.i [2020-10-26 19:47:44,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f989f14fe/a6b7529ddc4445b98674a3c4db2e224b/FLAGfc4d645cc [2020-10-26 19:47:44,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f989f14fe/a6b7529ddc4445b98674a3c4db2e224b [2020-10-26 19:47:44,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:47:44,852 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:47:44,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:47:44,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:47:44,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:47:44,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:47:44" (1/1) ... [2020-10-26 19:47:44,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29d98cf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:47:44, skipping insertion in model container [2020-10-26 19:47:44,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:47:44" (1/1) ... [2020-10-26 19:47:44,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:47:44,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:47:45,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:47:54,338 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:47:54,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:47:54,392 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:47:54,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:47:54 WrapperNode [2020-10-26 19:47:54,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:47:54,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:47:54,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:47:54,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:47:54,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:47:54" (1/1) ... [2020-10-26 19:47:54,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:47:54" (1/1) ... [2020-10-26 19:47:54,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:47:54" (1/1) ... [2020-10-26 19:47:54,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:47:54" (1/1) ... [2020-10-26 19:47:54,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:47:54" (1/1) ... [2020-10-26 19:47:54,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:47:54" (1/1) ... [2020-10-26 19:47:54,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:47:54" (1/1) ... [2020-10-26 19:47:54,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:47:54,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:47:54,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:47:54,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:47:54,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:47:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:47:54,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:47:54,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:47:54,552 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:47:54,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:47:54,553 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:47:54,553 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:47:54,554 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:47:54,555 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:47:54,555 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:47:54,555 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:47:54,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:47:54,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:47:54,557 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:47:54,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:47:54,558 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:47:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:47:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-26 19:47:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-26 19:47:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:47:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:47:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:47:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:47:54,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:47:54,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:47:55,159 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:47:55,163 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 19:47:55,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:47:55 BoogieIcfgContainer [2020-10-26 19:47:55,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:47:55,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:47:55,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:47:55,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:47:55,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:47:44" (1/3) ... [2020-10-26 19:47:55,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7f042f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:47:55, skipping insertion in model container [2020-10-26 19:47:55,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:47:54" (2/3) ... [2020-10-26 19:47:55,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7f042f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:47:55, skipping insertion in model container [2020-10-26 19:47:55,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:47:55" (3/3) ... [2020-10-26 19:47:55,179 INFO L111 eAbstractionObserver]: Analyzing ICFG break-1.i [2020-10-26 19:47:55,196 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:47:55,204 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:47:55,222 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:47:55,257 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:47:55,257 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:47:55,257 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:47:55,257 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:47:55,258 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:47:55,258 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:47:55,258 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:47:55,258 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:47:55,281 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-26 19:47:55,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 19:47:55,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:55,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:55,291 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:55,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1575655028, now seen corresponding path program 1 times [2020-10-26 19:47:55,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:55,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014639528] [2020-10-26 19:47:55,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:55,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:55,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:55,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:47:55,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:55,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-26 19:47:55,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:55,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:55,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:47:55,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:55,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 19:47:55,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:55,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:55,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:55,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:55,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:55,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 19:47:55,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:55,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:55,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:55,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:55,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:47:55,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014639528] [2020-10-26 19:47:55,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:47:55,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:47:55,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354002051] [2020-10-26 19:47:55,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:47:55,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:55,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:47:55,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:47:55,927 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-10-26 19:47:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:56,227 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-10-26 19:47:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:47:56,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-26 19:47:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:56,239 INFO L225 Difference]: With dead ends: 61 [2020-10-26 19:47:56,240 INFO L226 Difference]: Without dead ends: 31 [2020-10-26 19:47:56,244 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 [2020-10-26 19:47:56,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-26 19:47:56,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-10-26 19:47:56,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-26 19:47:56,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-26 19:47:56,302 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-10-26 19:47:56,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:56,303 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-26 19:47:56,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:47:56,303 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-26 19:47:56,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 19:47:56,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:56,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:56,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:47:56,305 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:56,306 INFO L82 PathProgramCache]: Analyzing trace with hash 585993527, now seen corresponding path program 1 times [2020-10-26 19:47:56,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:56,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136153716] [2020-10-26 19:47:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:56,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:56,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:56,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:47:56,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:56,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-26 19:47:56,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:56,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:47:56,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:56,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:47:56,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:56,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:56,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:56,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:56,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:56,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:56,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 19:47:56,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:56,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:56,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:56,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:56,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:47:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:47:56,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136153716] [2020-10-26 19:47:56,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:47:56,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:47:56,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391890288] [2020-10-26 19:47:56,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:47:56,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:56,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:47:56,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:47:56,647 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2020-10-26 19:47:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:56,843 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-10-26 19:47:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:47:56,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-26 19:47:56,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:56,845 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:47:56,846 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:47:56,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:47:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:47:56,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 24. [2020-10-26 19:47:56,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 19:47:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-26 19:47:56,858 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2020-10-26 19:47:56,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:56,859 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-26 19:47:56,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:47:56,859 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-26 19:47:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:47:56,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:56,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:56,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:47:56,861 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:56,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:56,861 INFO L82 PathProgramCache]: Analyzing trace with hash 836905597, now seen corresponding path program 1 times [2020-10-26 19:47:56,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:56,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341238677] [2020-10-26 19:47:56,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:56,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:57,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:57,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:47:57,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:57,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-26 19:47:57,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:57,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:47:57,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:47:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:47:57,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:57,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:57,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:57,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:57,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:57,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:57,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:47:57,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:57,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:57,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:57,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:57,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:47:57,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341238677] [2020-10-26 19:47:57,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:47:57,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:47:57,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877059085] [2020-10-26 19:47:57,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:47:57,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:57,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:47:57,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:47:57,109 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-10-26 19:47:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:57,246 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-26 19:47:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:47:57,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:47:57,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:57,248 INFO L225 Difference]: With dead ends: 46 [2020-10-26 19:47:57,248 INFO L226 Difference]: Without dead ends: 25 [2020-10-26 19:47:57,249 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 [2020-10-26 19:47:57,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-26 19:47:57,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-26 19:47:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 19:47:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-26 19:47:57,257 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 17 [2020-10-26 19:47:57,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:57,258 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-26 19:47:57,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:47:57,258 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-26 19:47:57,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:47:57,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:57,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:57,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:47:57,260 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:57,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1977759324, now seen corresponding path program 1 times [2020-10-26 19:47:57,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:57,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611270322] [2020-10-26 19:47:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:57,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:57,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:57,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:57,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:47:57,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:57,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-26 19:47:57,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:57,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:47:57,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:57,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:47:57,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:47:57,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:57,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:57,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:57,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:57,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:57,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:47:57,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:57,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:57,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:57,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:57,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:47:57,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611270322] [2020-10-26 19:47:57,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:57,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:47:57,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75441352] [2020-10-26 19:47:57,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:47:57,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:57,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:47:57,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:47:57,891 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2020-10-26 19:47:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:58,059 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-26 19:47:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:47:58,060 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-26 19:47:58,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:58,062 INFO L225 Difference]: With dead ends: 53 [2020-10-26 19:47:58,062 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:47:58,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:47:58,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:47:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2020-10-26 19:47:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-26 19:47:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-26 19:47:58,072 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2020-10-26 19:47:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:58,072 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-26 19:47:58,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:47:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-26 19:47:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:47:58,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:58,074 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:58,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:47:58,074 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:58,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1335518697, now seen corresponding path program 2 times [2020-10-26 19:47:58,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:58,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761336649] [2020-10-26 19:47:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:58,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:58,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:58,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:58,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:47:58,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:58,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 861 [2020-10-26 19:47:58,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:58,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:47:58,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:58,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:47:58,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:59,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:59,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:59,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:59,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:59,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:59,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:47:59,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:59,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:59,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:59,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:59,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:47:59,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761336649] [2020-10-26 19:47:59,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:59,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:47:59,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798880514] [2020-10-26 19:47:59,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:47:59,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:59,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:47:59,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:47:59,148 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-10-26 19:47:59,315 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-26 19:47:59,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:59,611 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-26 19:47:59,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:47:59,612 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-26 19:47:59,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:59,613 INFO L225 Difference]: With dead ends: 40 [2020-10-26 19:47:59,614 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:47:59,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:47:59,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:47:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-26 19:47:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:47:59,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-26 19:47:59,623 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 22 [2020-10-26 19:47:59,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:59,623 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-26 19:47:59,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:47:59,624 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-26 19:47:59,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:47:59,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:59,625 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:59,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:47:59,626 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:59,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:59,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1214224133, now seen corresponding path program 1 times [2020-10-26 19:47:59,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:59,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319517661] [2020-10-26 19:47:59,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:59,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:59,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:59,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:00,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:01,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:01,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:48:01,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:48:01,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1687 [2020-10-26 19:48:01,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:01,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:48:01,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:48:01,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:48:01,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:01,967 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-26 19:48:02,216 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-26 19:48:02,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:02,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:02,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:02,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:02,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:02,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 19:48:02,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:02,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:48:02,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:02,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:48:02,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:48:02,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-26 19:48:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:02,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:02,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:02,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:48:02,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:02,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 19:48:02,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:02,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:48:02,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:02,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:48:02,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:48:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:02,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319517661] [2020-10-26 19:48:02,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:02,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:48:02,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035091274] [2020-10-26 19:48:02,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:48:02,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:02,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:48:02,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:48:02,642 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2020-10-26 19:48:03,634 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-26 19:48:04,202 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-26 19:48:05,007 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-10-26 19:48:05,359 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-26 19:48:05,702 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-26 19:48:06,274 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-10-26 19:48:06,990 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-26 19:48:07,531 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-26 19:48:08,197 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-26 19:48:08,842 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2020-10-26 19:48:09,135 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-26 19:48:09,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:09,496 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-26 19:48:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:48:09,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-10-26 19:48:09,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:09,506 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:48:09,506 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:48:09,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:48:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:48:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-26 19:48:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:48:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-26 19:48:09,517 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-10-26 19:48:09,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:09,517 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-26 19:48:09,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:48:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-26 19:48:09,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:48:09,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:09,519 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:09,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:48:09,519 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:09,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:09,520 INFO L82 PathProgramCache]: Analyzing trace with hash -699706632, now seen corresponding path program 2 times [2020-10-26 19:48:09,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:09,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548232757] [2020-10-26 19:48:09,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:09,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:09,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:10,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:10,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:12,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:12,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:48:12,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:48:12,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2849 [2020-10-26 19:48:12,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:12,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:48:12,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:48:12,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:48:12,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:13,987 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 54 [2020-10-26 19:48:14,418 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 57 [2020-10-26 19:48:15,598 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 73 [2020-10-26 19:48:16,593 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 68 [2020-10-26 19:48:17,022 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-10-26 19:48:17,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:17,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:17,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:17,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:17,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:17,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 19:48:17,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:17,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:48:17,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:17,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:48:17,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:17,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 19:48:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:17,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:17,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:17,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:48:17,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:17,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 19:48:17,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:17,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:48:17,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:17,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:48:17,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:17,500 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:17,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548232757] [2020-10-26 19:48:17,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:17,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:48:17,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522117352] [2020-10-26 19:48:17,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:48:17,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:17,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:48:17,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:48:17,512 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2020-10-26 19:48:18,349 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-26 19:48:19,751 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2020-10-26 19:48:20,883 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-10-26 19:48:22,588 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 107 DAG size of output: 101 [2020-10-26 19:48:23,323 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-26 19:48:24,023 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-26 19:48:25,214 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-10-26 19:48:27,243 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-10-26 19:48:28,470 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2020-10-26 19:48:32,477 WARN L193 SmtUtils]: Spent 3.53 s on a formula simplification. DAG size of input: 123 DAG size of output: 96 [2020-10-26 19:48:37,008 WARN L193 SmtUtils]: Spent 3.91 s on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2020-10-26 19:48:37,941 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-26 19:48:39,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:39,867 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-26 19:48:39,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:48:39,871 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-10-26 19:48:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:39,872 INFO L225 Difference]: With dead ends: 65 [2020-10-26 19:48:39,872 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 19:48:39,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:48:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 19:48:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-26 19:48:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:48:39,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-26 19:48:39,885 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2020-10-26 19:48:39,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:39,885 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-26 19:48:39,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:48:39,885 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-26 19:48:39,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:48:39,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:39,887 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:39,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:48:39,887 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:39,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:39,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1374694949, now seen corresponding path program 3 times [2020-10-26 19:48:39,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:39,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271940579] [2020-10-26 19:48:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:39,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:39,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:40,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:40,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:43,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:43,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:48:43,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:48:43,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3414 [2020-10-26 19:48:43,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:43,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:48:43,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:48:43,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:48:43,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:49,174 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2020-10-26 19:48:49,398 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2020-10-26 19:48:50,420 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 73 [2020-10-26 19:48:51,815 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 159 DAG size of output: 78 [2020-10-26 19:48:54,424 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 259 DAG size of output: 94 [2020-10-26 19:48:58,992 WARN L193 SmtUtils]: Spent 3.67 s on a formula simplification. DAG size of input: 263 DAG size of output: 96 [2020-10-26 19:49:04,784 WARN L193 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 343 DAG size of output: 119 [2020-10-26 19:49:11,878 WARN L193 SmtUtils]: Spent 6.32 s on a formula simplification. DAG size of input: 340 DAG size of output: 115 [2020-10-26 19:49:13,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:13,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:13,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:13,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:13,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:13,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:49:13,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:13,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:49:13,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:13,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:49:13,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:13,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 19:49:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:13,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:13,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:13,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:49:13,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:13,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:49:13,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:13,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:49:13,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:13,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:49:13,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:14,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271940579] [2020-10-26 19:49:14,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:14,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:49:14,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581477277] [2020-10-26 19:49:14,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:49:14,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:14,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:49:14,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:49:14,128 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 21 states. [2020-10-26 19:49:15,237 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 27 [2020-10-26 19:49:17,586 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-26 19:49:22,376 WARN L193 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 141 DAG size of output: 137 [2020-10-26 19:49:28,551 WARN L193 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 133 DAG size of output: 129 [2020-10-26 19:49:35,070 WARN L193 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 150 DAG size of output: 140 [2020-10-26 19:49:37,927 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 147 [2020-10-26 19:49:40,918 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 150 [2020-10-26 19:49:46,177 WARN L193 SmtUtils]: Spent 3.84 s on a formula simplification. DAG size of input: 154 DAG size of output: 152 [2020-10-26 19:50:30,164 WARN L193 SmtUtils]: Spent 38.61 s on a formula simplification. DAG size of input: 204 DAG size of output: 168 [2020-10-26 19:50:30,425 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-10-26 19:50:37,845 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification that was a NOOP. DAG size: 124 [2020-10-26 19:51:22,985 WARN L193 SmtUtils]: Spent 36.92 s on a formula simplification. DAG size of input: 207 DAG size of output: 162 [2020-10-26 19:51:26,887 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 150 [2020-10-26 19:51:32,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:32,600 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-26 19:51:32,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:51:32,604 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-10-26 19:51:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:32,606 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:51:32,606 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:51:32,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 139.6s TimeCoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:51:32,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:51:32,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-26 19:51:32,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:51:32,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-26 19:51:32,616 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2020-10-26 19:51:32,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:32,617 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-26 19:51:32,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:51:32,617 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-26 19:51:32,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:51:32,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:32,618 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:32,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:51:32,619 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:32,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:32,621 INFO L82 PathProgramCache]: Analyzing trace with hash -412227624, now seen corresponding path program 4 times [2020-10-26 19:51:32,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:32,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114019866] [2020-10-26 19:51:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:32,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:32,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:33,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:33,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:37,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:37,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:51:37,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:51:37,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4807 [2020-10-26 19:51:37,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:37,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:51:37,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:51:37,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:51:37,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0