/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-fpi/conda.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:37:06,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:37:06,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:37:07,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:37:07,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:37:07,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:37:07,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:37:07,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:37:07,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:37:07,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:37:07,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:37:07,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:37:07,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:37:07,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:37:07,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:37:07,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:37:07,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:37:07,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:37:07,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:37:07,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:37:07,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:37:07,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:37:07,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:37:07,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:37:07,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:37:07,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:37:07,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:37:07,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:37:07,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:37:07,065 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:37:07,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:37:07,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:37:07,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:37:07,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:37:07,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:37:07,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:37:07,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:37:07,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:37:07,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:37:07,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:37:07,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:37:07,081 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 19:37:07,135 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:37:07,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:37:07,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:37:07,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:37:07,140 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:37:07,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:37:07,140 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:37:07,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:37:07,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:37:07,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:37:07,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:37:07,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:37:07,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:37:07,143 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:37:07,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:37:07,144 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:37:07,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:37:07,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:37:07,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:37:07,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:37:07,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:37:07,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:37:07,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:37:07,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:37:07,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:37:07,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:37:07,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:37:07,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:37:07,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:37:07,148 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:37:07,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:37:07,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:37:07,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:37:07,556 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:37:07,557 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:37:07,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/conda.c [2020-10-26 19:37:07,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/944912e23/a9afcd8dfcff41378357a0659e725265/FLAG2a2f20245 [2020-10-26 19:37:08,216 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:37:08,217 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/conda.c [2020-10-26 19:37:08,224 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/944912e23/a9afcd8dfcff41378357a0659e725265/FLAG2a2f20245 [2020-10-26 19:37:08,585 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/944912e23/a9afcd8dfcff41378357a0659e725265 [2020-10-26 19:37:08,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:37:08,595 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:37:08,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:37:08,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:37:08,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:37:08,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:37:08" (1/1) ... [2020-10-26 19:37:08,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7260ffa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:08, skipping insertion in model container [2020-10-26 19:37:08,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:37:08" (1/1) ... [2020-10-26 19:37:08,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:37:08,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:37:08,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:37:08,822 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:37:08,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:37:08,870 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:37:08,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:08 WrapperNode [2020-10-26 19:37:08,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:37:08,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:37:08,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:37:08,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:37:08,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:08" (1/1) ... [2020-10-26 19:37:08,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:08" (1/1) ... [2020-10-26 19:37:08,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:08" (1/1) ... [2020-10-26 19:37:08,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:08" (1/1) ... [2020-10-26 19:37:08,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:08" (1/1) ... [2020-10-26 19:37:08,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:08" (1/1) ... [2020-10-26 19:37:08,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:08" (1/1) ... [2020-10-26 19:37:08,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:37:08,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:37:08,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:37:08,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:37:08,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:08" (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 19:37:09,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:37:09,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:37:09,002 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:37:09,002 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:37:09,002 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:37:09,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:37:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:37:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:37:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:37:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:37:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:37:09,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:37:09,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:37:09,004 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:37:09,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:37:09,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:37:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:37:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:37:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:37:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:37:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:37:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:37:09,331 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:37:09,331 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:37:09,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:37:09 BoogieIcfgContainer [2020-10-26 19:37:09,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:37:09,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:37:09,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:37:09,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:37:09,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:37:08" (1/3) ... [2020-10-26 19:37:09,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b80e63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:37:09, skipping insertion in model container [2020-10-26 19:37:09,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:08" (2/3) ... [2020-10-26 19:37:09,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b80e63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:37:09, skipping insertion in model container [2020-10-26 19:37:09,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:37:09" (3/3) ... [2020-10-26 19:37:09,344 INFO L111 eAbstractionObserver]: Analyzing ICFG conda.c [2020-10-26 19:37:09,359 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:37:09,364 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:37:09,379 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:37:09,410 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:37:09,411 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:37:09,411 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:37:09,411 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:37:09,411 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:37:09,411 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:37:09,411 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:37:09,412 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:37:09,434 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-26 19:37:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:37:09,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:09,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:09,443 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:09,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:09,450 INFO L82 PathProgramCache]: Analyzing trace with hash 371341983, now seen corresponding path program 1 times [2020-10-26 19:37:09,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:09,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871436200] [2020-10-26 19:37:09,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:09,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:10,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:37:10,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:37:10,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 908 [2020-10-26 19:37:10,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:10,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:37:10,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:10,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:37:10,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:37:10,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:10,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:10,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:10,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:10,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 19:37:10,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:10,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:10,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:10,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:10,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:37:10,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:10,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:10,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:10,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:10,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:37:10,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:10,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:10,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:10,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:10,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:10,842 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 19:37:10,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871436200] [2020-10-26 19:37:10,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:37:10,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:37:10,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578232583] [2020-10-26 19:37:10,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:37:10,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:10,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:37:10,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:37:10,876 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2020-10-26 19:37:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:11,157 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2020-10-26 19:37:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:37:11,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-26 19:37:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:11,167 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:37:11,168 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:37:11,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:37:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:37:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-10-26 19:37:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 19:37:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-26 19:37:11,219 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-26 19:37:11,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:11,220 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-26 19:37:11,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:37:11,220 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-26 19:37:11,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:37:11,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:11,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:11,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:37:11,222 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:11,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:11,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2090381425, now seen corresponding path program 1 times [2020-10-26 19:37:11,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:11,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719962181] [2020-10-26 19:37:11,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:11,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:11,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:11,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:11,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:12,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:12,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:12,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:12,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:14,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:37:14,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:37:14,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3492 [2020-10-26 19:37:14,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:14,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:37:14,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:14,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:37:14,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:15,163 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2020-10-26 19:37:15,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:15,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:15,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:15,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:15,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:15,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:37:15,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:15,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:15,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:15,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:15,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:15,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:15,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:15,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:15,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:15,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:15,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:15,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:15,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:15,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:15,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:15,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:15,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719962181] [2020-10-26 19:37:15,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:15,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:37:15,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11489728] [2020-10-26 19:37:15,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:37:15,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:15,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:37:15,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:37:15,633 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 16 states. [2020-10-26 19:37:16,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:16,918 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-26 19:37:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:37:16,919 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-26 19:37:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:16,921 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:37:16,921 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:37:16,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:37:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:37:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-10-26 19:37:16,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:37:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-26 19:37:16,945 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2020-10-26 19:37:16,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:16,946 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-26 19:37:16,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:37:16,946 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-26 19:37:16,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:37:16,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:16,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:16,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:37:16,949 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:16,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:16,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1617779857, now seen corresponding path program 1 times [2020-10-26 19:37:16,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:16,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200441432] [2020-10-26 19:37:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:17,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:17,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:17,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:17,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:18,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:37:18,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:37:18,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1303 [2020-10-26 19:37:18,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:18,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:37:18,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:18,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:37:18,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:18,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:18,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:18,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:18,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:18,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:37:18,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:18,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:18,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:18,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:18,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:18,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:18,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:18,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:18,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:18,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:18,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:18,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:18,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:18,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:18,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:18,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200441432] [2020-10-26 19:37:18,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:18,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:37:18,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376681804] [2020-10-26 19:37:18,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:37:18,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:18,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:37:18,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:37:18,478 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-10-26 19:37:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:18,895 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2020-10-26 19:37:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:37:18,896 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-26 19:37:18,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:18,897 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:37:18,897 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:37:18,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:37:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:37:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2020-10-26 19:37:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:37:18,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-26 19:37:18,911 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2020-10-26 19:37:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:18,911 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-26 19:37:18,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:37:18,912 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-26 19:37:18,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:37:18,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:18,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:18,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:37:18,914 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:18,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:18,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1912294515, now seen corresponding path program 2 times [2020-10-26 19:37:18,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:18,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082421952] [2020-10-26 19:37:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:18,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:19,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:19,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:37:19,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:19,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-26 19:37:19,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:19,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:37:19,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:19,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:37:19,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:19,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:19,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:19,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:19,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:19,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:19,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 19:37:19,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:19,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:19,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:19,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:19,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:19,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:19,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:19,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:19,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:19,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:19,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:19,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:19,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:19,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:19,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:19,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:37:19,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082421952] [2020-10-26 19:37:19,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:19,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:37:19,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056125506] [2020-10-26 19:37:19,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:37:19,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:19,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:37:19,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:37:19,767 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 8 states. [2020-10-26 19:37:20,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:20,025 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2020-10-26 19:37:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:37:20,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-26 19:37:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:20,026 INFO L225 Difference]: With dead ends: 97 [2020-10-26 19:37:20,027 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:37:20,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:37:20,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:37:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2020-10-26 19:37:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:37:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-26 19:37:20,038 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 33 [2020-10-26 19:37:20,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:20,038 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-26 19:37:20,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:37:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-26 19:37:20,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:37:20,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:20,040 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:20,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:37:20,040 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:20,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:20,041 INFO L82 PathProgramCache]: Analyzing trace with hash 234001266, now seen corresponding path program 1 times [2020-10-26 19:37:20,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:20,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476257609] [2020-10-26 19:37:20,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:20,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:21,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:24,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:24,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:37:24,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:37:24,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4471 [2020-10-26 19:37:24,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:24,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:37:24,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:24,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:37:24,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:24,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:24,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:24,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:24,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:24,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:24,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:37:24,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:24,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:24,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:24,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:24,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:37:24,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:24,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:24,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:24,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:24,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:24,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:24,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:24,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:24,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:24,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:24,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:37:24,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476257609] [2020-10-26 19:37:24,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:24,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:37:24,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365384166] [2020-10-26 19:37:24,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:37:24,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:24,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:37:24,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:37:24,882 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 13 states. [2020-10-26 19:37:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:25,926 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-10-26 19:37:25,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:37:25,926 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-26 19:37:25,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:25,928 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:37:25,928 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:37:25,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:37:25,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:37:25,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2020-10-26 19:37:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:37:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-26 19:37:25,938 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 36 [2020-10-26 19:37:25,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:25,938 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-26 19:37:25,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:37:25,938 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-26 19:37:25,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:37:25,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:25,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:25,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:37:25,940 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:25,940 INFO L82 PathProgramCache]: Analyzing trace with hash -283658706, now seen corresponding path program 3 times [2020-10-26 19:37:25,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:25,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069220380] [2020-10-26 19:37:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:25,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:27,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:27,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:28,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:28,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:29,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:29,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:30,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:30,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:30,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:30,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:37:30,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:37:30,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:37:30,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:30,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:37:30,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:30,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:37:30,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:31,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:31,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:31,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:31,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:31,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:37:31,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:31,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:31,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:31,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:31,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:31,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:31,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:31,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:31,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:31,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:31,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:31,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:31,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:31,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:31,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:31,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069220380] [2020-10-26 19:37:31,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:31,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:37:31,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636581283] [2020-10-26 19:37:31,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:37:31,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:31,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:37:31,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:37:31,930 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 20 states. [2020-10-26 19:37:33,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:33,305 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-26 19:37:33,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:37:33,307 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-26 19:37:33,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:33,309 INFO L225 Difference]: With dead ends: 59 [2020-10-26 19:37:33,310 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:37:33,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:37:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:37:33,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-10-26 19:37:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:37:33,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-26 19:37:33,322 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 38 [2020-10-26 19:37:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:33,323 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-26 19:37:33,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:37:33,323 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-26 19:37:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:37:33,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:33,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:33,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:37:33,324 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:33,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1563522384, now seen corresponding path program 2 times [2020-10-26 19:37:33,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:33,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969184314] [2020-10-26 19:37:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:33,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:33,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:33,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:36,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:37,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:37:37,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:37:37,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4077 [2020-10-26 19:37:37,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:37:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:37:37,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:37,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:37,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:37,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:37,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:37,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:37,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:37,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:37,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:37,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:37,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:37,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:37,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:37,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:37,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:37,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:37,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:37,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:37,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:37,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:37,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:37,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969184314] [2020-10-26 19:37:37,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:37,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:37:37,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728140163] [2020-10-26 19:37:37,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:37:37,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:37,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:37:37,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:37:37,680 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 14 states. [2020-10-26 19:37:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:38,375 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-10-26 19:37:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:37:38,376 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-26 19:37:38,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:38,377 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:37:38,378 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:37:38,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:37:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:37:38,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2020-10-26 19:37:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:37:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-10-26 19:37:38,396 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 38 [2020-10-26 19:37:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:38,396 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-10-26 19:37:38,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:37:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-10-26 19:37:38,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:37:38,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:38,398 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:38,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:37:38,398 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:38,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:38,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2017163884, now seen corresponding path program 3 times [2020-10-26 19:37:38,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:38,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894097278] [2020-10-26 19:37:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:38,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:38,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:38,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:38,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:41,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:41,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:37:41,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:37:41,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3331 [2020-10-26 19:37:41,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:41,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:37:41,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:41,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:37:41,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:41,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:41,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:41,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:41,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:41,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:41,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:37:41,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:41,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:41,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:41,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:41,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:41,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:41,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:41,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:41,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:41,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:41,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:41,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:41,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:37:41,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894097278] [2020-10-26 19:37:41,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:41,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:37:41,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295531840] [2020-10-26 19:37:41,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:37:41,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:41,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:37:41,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:37:41,914 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 7 states. [2020-10-26 19:37:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:42,062 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2020-10-26 19:37:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:37:42,062 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-26 19:37:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:42,063 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:37:42,063 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:37:42,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:37:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:37:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-26 19:37:42,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:37:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-26 19:37:42,077 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 38 [2020-10-26 19:37:42,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:42,077 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-26 19:37:42,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:37:42,077 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-26 19:37:42,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:37:42,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:42,078 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:42,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:37:42,079 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:42,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:42,079 INFO L82 PathProgramCache]: Analyzing trace with hash -818549140, now seen corresponding path program 4 times [2020-10-26 19:37:42,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:42,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579959653] [2020-10-26 19:37:42,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:42,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:43,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:43,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:37:43,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:43,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-10-26 19:37:43,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:43,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:37:43,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:43,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:37:43,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:43,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:43,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:43,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:43,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:43,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:43,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:37:43,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:43,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:43,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:43,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:43,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:43,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:43,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:43,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:43,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:43,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:43,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:43,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:43,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:37:43,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579959653] [2020-10-26 19:37:43,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:43,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:37:43,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244842048] [2020-10-26 19:37:43,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:37:43,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:43,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:37:43,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:37:43,239 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 10 states. [2020-10-26 19:37:43,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:43,500 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2020-10-26 19:37:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:37:43,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-26 19:37:43,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:43,501 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:37:43,501 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:37:43,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:37:43,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:37:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-26 19:37:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:37:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-26 19:37:43,522 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 40 [2020-10-26 19:37:43,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:43,522 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-26 19:37:43,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:37:43,522 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-26 19:37:43,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:37:43,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:43,526 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:43,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:37:43,526 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:43,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:43,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1368274927, now seen corresponding path program 5 times [2020-10-26 19:37:43,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:43,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189155277] [2020-10-26 19:37:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:43,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:43,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:45,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:45,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:47,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:47,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:48,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:48,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:48,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:48,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:37:48,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:37:48,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5104 [2020-10-26 19:37:48,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:48,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:37:48,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:48,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:37:48,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:50,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:50,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:50,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:50,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:50,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:50,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:50,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:50,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:50,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:50,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:50,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:50,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:50,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:50,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:50,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:50,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:50,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:50,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:50,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:50,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:50,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:50,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:50,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189155277] [2020-10-26 19:37:50,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:50,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:37:50,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788618950] [2020-10-26 19:37:50,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:37:50,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:50,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:37:50,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:37:50,419 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 26 states. [2020-10-26 19:37:52,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:52,483 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2020-10-26 19:37:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:37:52,483 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 45 [2020-10-26 19:37:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:52,485 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:37:52,485 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:37:52,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=141, Invalid=1341, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:37:52,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:37:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-10-26 19:37:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:37:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-26 19:37:52,499 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 45 [2020-10-26 19:37:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:52,500 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-26 19:37:52,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:37:52,500 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-26 19:37:52,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:37:52,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:52,503 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:52,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:37:52,503 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:52,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:52,505 INFO L82 PathProgramCache]: Analyzing trace with hash -220072975, now seen corresponding path program 4 times [2020-10-26 19:37:52,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:52,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115274741] [2020-10-26 19:37:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:52,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:53,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:53,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:54,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:54,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:55,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:56,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:57,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:37:57,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:37:57,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:37:57,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:57,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:37:57,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:57,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:37:57,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:57,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:57,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:57,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:57,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:57,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:57,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:57,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:57,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:57,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:57,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:57,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:57,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:57,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:57,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:57,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:57,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:57,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:57,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:57,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:57,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:37:57,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115274741] [2020-10-26 19:37:57,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:57,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:37:57,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982774036] [2020-10-26 19:37:57,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:37:57,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:57,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:37:57,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:37:57,739 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 11 states. [2020-10-26 19:37:58,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:58,253 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2020-10-26 19:37:58,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:37:58,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-26 19:37:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:58,256 INFO L225 Difference]: With dead ends: 81 [2020-10-26 19:37:58,256 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:37:58,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:37:58,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:37:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2020-10-26 19:37:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:37:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-10-26 19:37:58,268 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 45 [2020-10-26 19:37:58,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:58,269 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-10-26 19:37:58,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:37:58,269 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-10-26 19:37:58,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:37:58,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:58,270 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:58,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:37:58,270 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:58,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:58,271 INFO L82 PathProgramCache]: Analyzing trace with hash 550626477, now seen corresponding path program 5 times [2020-10-26 19:37:58,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:58,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065624048] [2020-10-26 19:37:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:58,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:58,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:58,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:59,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:59,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:59,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:59,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:59,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:01,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:03,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:03,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:03,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:38:03,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:38:03,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 19:38:03,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:38:03,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:03,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:38:03,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:03,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:03,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:03,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:03,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:03,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:03,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:03,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:03,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:03,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:03,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:03,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:03,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:03,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:03,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:03,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:03,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:03,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:03,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:03,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:03,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:03,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:03,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:03,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065624048] [2020-10-26 19:38:03,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:03,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:38:03,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853058876] [2020-10-26 19:38:03,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:38:03,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:03,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:38:03,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:38:03,663 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 18 states. [2020-10-26 19:38:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:05,462 INFO L93 Difference]: Finished difference Result 129 states and 148 transitions. [2020-10-26 19:38:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:38:05,463 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-26 19:38:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:05,464 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:38:05,465 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:38:05,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=445, Invalid=2311, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:38:05,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:38:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 73. [2020-10-26 19:38:05,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:38:05,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-10-26 19:38:05,480 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 45 [2020-10-26 19:38:05,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:05,480 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-10-26 19:38:05,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:38:05,481 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-10-26 19:38:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:38:05,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:05,482 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:05,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:38:05,482 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:05,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:05,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1846739949, now seen corresponding path program 6 times [2020-10-26 19:38:05,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:05,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387261057] [2020-10-26 19:38:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:05,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:05,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:06,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:06,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:38:06,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:38:06,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1360 [2020-10-26 19:38:06,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:06,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:38:06,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:06,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:38:06,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:06,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:06,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:06,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:06,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:06,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:06,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:06,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:06,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:06,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:06,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:06,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:06,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:06,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:06,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:06,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:06,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:06,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:06,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:06,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:06,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:38:06,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387261057] [2020-10-26 19:38:06,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:06,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:38:06,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538792178] [2020-10-26 19:38:06,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:38:06,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:06,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:38:06,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:38:06,997 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 12 states. [2020-10-26 19:38:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:07,420 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2020-10-26 19:38:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:38:07,422 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-26 19:38:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:07,422 INFO L225 Difference]: With dead ends: 133 [2020-10-26 19:38:07,422 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:38:07,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:38:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:38:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2020-10-26 19:38:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:38:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2020-10-26 19:38:07,435 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 47 [2020-10-26 19:38:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:07,435 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2020-10-26 19:38:07,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:38:07,436 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2020-10-26 19:38:07,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:38:07,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:07,439 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:07,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:38:07,439 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:07,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:07,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1179539386, now seen corresponding path program 7 times [2020-10-26 19:38:07,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:07,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822228515] [2020-10-26 19:38:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:07,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:07,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:09,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:10,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:10,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:10,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:11,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:11,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:12,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:12,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:38:12,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:38:12,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:38:12,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:12,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:38:12,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:12,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:38:12,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:12,998 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-26 19:38:13,315 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-26 19:38:13,537 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-26 19:38:13,728 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-26 19:38:15,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:15,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:15,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:15,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:15,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:15,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:15,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:15,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:15,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:15,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:15,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:15,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:15,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:15,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:15,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:15,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:15,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:38:15,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:15,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:15,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:15,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:15,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:38:15,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822228515] [2020-10-26 19:38:15,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:15,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:38:15,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781990847] [2020-10-26 19:38:15,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:38:15,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:15,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:38:15,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:38:15,052 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 29 states. [2020-10-26 19:38:16,000 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-26 19:38:16,351 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-26 19:38:16,566 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-26 19:38:16,909 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-10-26 19:38:17,158 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-10-26 19:38:17,945 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-26 19:38:18,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:18,348 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2020-10-26 19:38:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:38:18,348 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 52 [2020-10-26 19:38:18,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:18,349 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:38:18,349 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:38:18,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:38:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:38:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-10-26 19:38:18,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:38:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2020-10-26 19:38:18,368 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 52 [2020-10-26 19:38:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:18,369 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2020-10-26 19:38:18,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:38:18,369 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2020-10-26 19:38:18,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:38:18,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:18,370 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:18,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:38:18,370 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:18,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:18,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1426484168, now seen corresponding path program 6 times [2020-10-26 19:38:18,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:18,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425824757] [2020-10-26 19:38:18,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:18,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:22,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:22,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:23,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:23,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:38:23,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:38:23,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:38:23,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:23,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:38:23,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:23,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:38:23,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:23,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:23,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:23,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:23,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:23,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:23,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:23,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:23,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:23,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:23,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:23,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:23,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:23,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:23,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:23,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:23,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:23,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:38:23,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:23,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:23,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:23,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:23,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 19:38:23,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425824757] [2020-10-26 19:38:23,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:23,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:38:23,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329147757] [2020-10-26 19:38:23,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:38:23,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:23,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:38:23,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:38:23,674 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 13 states. [2020-10-26 19:38:24,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:24,421 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2020-10-26 19:38:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:38:24,422 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-26 19:38:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:24,423 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:38:24,424 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:38:24,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:38:24,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:38:24,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-10-26 19:38:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:38:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-10-26 19:38:24,438 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 52 [2020-10-26 19:38:24,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:24,438 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-10-26 19:38:24,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:38:24,438 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-10-26 19:38:24,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:38:24,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:24,439 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:24,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:38:24,439 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:24,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:24,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1815858001, now seen corresponding path program 8 times [2020-10-26 19:38:24,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:24,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87837114] [2020-10-26 19:38:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:24,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:25,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:25,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:25,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:25,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:25,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:25,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:25,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:28,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:29,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:29,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:29,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:29,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:29,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:38:29,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-26 19:38:29,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-26 19:38:29,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:38:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 19:38:29,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:29,780 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 28 [2020-10-26 19:38:29,994 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2020-10-26 19:38:30,137 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-26 19:38:30,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:30,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:31,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:31,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:31,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:31,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:31,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:31,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:31,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:31,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:31,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:31,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:31,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:31,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:31,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:31,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:31,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:31,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:31,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:31,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:31,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:31,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:38:31,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87837114] [2020-10-26 19:38:31,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:31,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:38:31,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898524356] [2020-10-26 19:38:31,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:38:31,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:31,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:38:31,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:38:31,025 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 24 states. [2020-10-26 19:38:32,647 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-26 19:38:33,020 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-10-26 19:38:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:33,649 INFO L93 Difference]: Finished difference Result 127 states and 144 transitions. [2020-10-26 19:38:33,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:38:33,650 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-26 19:38:33,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:33,651 INFO L225 Difference]: With dead ends: 127 [2020-10-26 19:38:33,651 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:38:33,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=430, Invalid=2120, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:38:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:38:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2020-10-26 19:38:33,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:38:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-10-26 19:38:33,672 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 55 [2020-10-26 19:38:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:33,672 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-10-26 19:38:33,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:38:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-10-26 19:38:33,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:38:33,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:33,673 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:33,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:38:33,674 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:33,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:33,674 INFO L82 PathProgramCache]: Analyzing trace with hash 790165553, now seen corresponding path program 7 times [2020-10-26 19:38:33,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:33,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856981336] [2020-10-26 19:38:33,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:33,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:38,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:38,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:38,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:38,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:38:38,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-26 19:38:38,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-26 19:38:38,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:38,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:38:38,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:38,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:38:38,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:40,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:40,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:40,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:40,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:40,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:40,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:40,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:40,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:40,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:40,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:40,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:40,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:40,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:40,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:40,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:40,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:40,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:40,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:40,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:40,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 19:38:40,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856981336] [2020-10-26 19:38:40,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:40,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:38:40,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218308331] [2020-10-26 19:38:40,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:38:40,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:40,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:38:40,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:38:40,328 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 23 states. [2020-10-26 19:38:41,062 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-26 19:38:41,356 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 49 [2020-10-26 19:38:41,547 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2020-10-26 19:38:41,751 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2020-10-26 19:38:42,020 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-26 19:38:42,315 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-26 19:38:42,486 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-26 19:38:42,867 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-26 19:38:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:43,342 INFO L93 Difference]: Finished difference Result 111 states and 125 transitions. [2020-10-26 19:38:43,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:38:43,343 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-26 19:38:43,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:43,344 INFO L225 Difference]: With dead ends: 111 [2020-10-26 19:38:43,344 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:38:43,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:38:43,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:38:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-10-26 19:38:43,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:38:43,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2020-10-26 19:38:43,363 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 55 [2020-10-26 19:38:43,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:43,363 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2020-10-26 19:38:43,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:38:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2020-10-26 19:38:43,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:38:43,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:43,364 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:43,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:38:43,364 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:43,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:43,365 INFO L82 PathProgramCache]: Analyzing trace with hash -88289107, now seen corresponding path program 9 times [2020-10-26 19:38:43,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:43,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589113656] [2020-10-26 19:38:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:43,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:43,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:43,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:44,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:44,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:44,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:44,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:45,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:47,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:47,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:48,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:48,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:38:48,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-26 19:38:48,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:38:48,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:48,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:38:48,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:48,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:38:48,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:48,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:48,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:48,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:48,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:48,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:48,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:38:48,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:48,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:48,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:48,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:48,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:49,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:49,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:49,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:49,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:49,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:49,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:49,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:49,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:49,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:49,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-26 19:38:49,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589113656] [2020-10-26 19:38:49,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:49,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:38:49,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353978339] [2020-10-26 19:38:49,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:38:49,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:49,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:38:49,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:38:49,033 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand 20 states. [2020-10-26 19:38:50,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:50,283 INFO L93 Difference]: Finished difference Result 149 states and 171 transitions. [2020-10-26 19:38:50,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:38:50,284 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-10-26 19:38:50,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:50,286 INFO L225 Difference]: With dead ends: 149 [2020-10-26 19:38:50,286 INFO L226 Difference]: Without dead ends: 129 [2020-10-26 19:38:50,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:38:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-26 19:38:50,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2020-10-26 19:38:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:38:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 128 transitions. [2020-10-26 19:38:50,306 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 128 transitions. Word has length 57 [2020-10-26 19:38:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:50,306 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 128 transitions. [2020-10-26 19:38:50,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:38:50,306 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 128 transitions. [2020-10-26 19:38:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:38:50,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:50,307 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:50,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:38:50,307 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:50,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:50,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1614132420, now seen corresponding path program 8 times [2020-10-26 19:38:50,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:50,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318861264] [2020-10-26 19:38:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:50,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:51,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:51,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:51,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:51,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:51,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:51,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:55,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:38:55,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-26 19:38:55,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:38:55,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:38:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:38:55,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:55,883 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-26 19:38:56,151 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2020-10-26 19:38:56,548 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 44 [2020-10-26 19:38:57,015 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 43 [2020-10-26 19:38:57,192 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-26 19:38:57,430 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-26 19:38:57,637 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-26 19:38:57,809 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-26 19:38:57,958 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-26 19:38:58,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:58,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:58,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:58,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:58,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:58,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:58,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:58,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:58,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:58,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:58,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:58,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:58,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:58,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:58,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:58,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:58,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:58,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:58,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:58,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:38:58,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318861264] [2020-10-26 19:38:58,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:58,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:38:58,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950017928] [2020-10-26 19:38:58,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:38:58,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:58,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:38:58,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:38:58,727 INFO L87 Difference]: Start difference. First operand 113 states and 128 transitions. Second operand 27 states. [2020-10-26 19:38:59,455 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-10-26 19:38:59,933 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 54 [2020-10-26 19:39:00,293 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-26 19:39:00,506 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-26 19:39:00,693 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-26 19:39:00,915 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-26 19:39:01,154 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-26 19:39:01,355 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 19:39:01,661 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-26 19:39:02,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:02,238 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2020-10-26 19:39:02,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:39:02,239 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-26 19:39:02,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:02,240 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:39:02,240 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:39:02,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=355, Invalid=1715, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:39:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:39:02,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 116. [2020-10-26 19:39:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-26 19:39:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2020-10-26 19:39:02,266 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 58 [2020-10-26 19:39:02,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:02,266 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2020-10-26 19:39:02,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:39:02,266 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2020-10-26 19:39:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:39:02,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:02,267 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:02,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:39:02,268 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:02,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:02,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1364016719, now seen corresponding path program 10 times [2020-10-26 19:39:02,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:02,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384119939] [2020-10-26 19:39:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:02,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:04,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:05,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:07,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:39:07,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:39:07,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:39:07,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:39:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:07,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-26 19:39:07,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:08,448 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 43 [2020-10-26 19:39:08,660 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2020-10-26 19:39:08,832 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-26 19:39:08,979 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2020-10-26 19:39:09,731 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-26 19:39:11,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:11,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:11,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:11,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:11,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:11,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:11,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:11,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:11,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:11,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:11,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:11,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:11,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:11,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:11,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:11,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:11,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:39:11,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:11,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:11,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:11,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:11,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:12,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384119939] [2020-10-26 19:39:12,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:12,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:39:12,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291210457] [2020-10-26 19:39:12,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:39:12,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:12,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:39:12,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:39:12,007 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand 38 states. [2020-10-26 19:39:15,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:15,227 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2020-10-26 19:39:15,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:39:15,228 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 59 [2020-10-26 19:39:15,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:15,229 INFO L225 Difference]: With dead ends: 139 [2020-10-26 19:39:15,230 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:39:15,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=118, Invalid=1774, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:39:15,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:39:15,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 119. [2020-10-26 19:39:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:39:15,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2020-10-26 19:39:15,255 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 59 [2020-10-26 19:39:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:15,255 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2020-10-26 19:39:15,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:39:15,255 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2020-10-26 19:39:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:39:15,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:15,256 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:15,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:39:15,256 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:15,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:15,257 INFO L82 PathProgramCache]: Analyzing trace with hash 488230031, now seen corresponding path program 9 times [2020-10-26 19:39:15,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:15,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984321431] [2020-10-26 19:39:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:15,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:18,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:18,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:18,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:18,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:19,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:19,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:19,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:20,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:39:20,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-26 19:39:20,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:39:20,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:20,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:39:20,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:20,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:39:20,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:21,226 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2020-10-26 19:39:21,382 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2020-10-26 19:39:22,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:22,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:22,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:22,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:22,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:22,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:22,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:22,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:22,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:22,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:22,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:22,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:22,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:22,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:22,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:22,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:22,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:22,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:22,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:22,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:22,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 19:39:22,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984321431] [2020-10-26 19:39:22,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:22,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:39:22,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375688637] [2020-10-26 19:39:22,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:39:22,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:22,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:39:22,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:39:22,119 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand 27 states. [2020-10-26 19:39:22,818 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-10-26 19:39:23,302 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-26 19:39:24,317 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 19:39:24,585 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-26 19:39:24,787 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-26 19:39:24,978 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-26 19:39:25,248 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-26 19:39:25,398 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-26 19:39:25,815 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-26 19:39:26,222 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-26 19:39:26,724 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-26 19:39:27,409 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-26 19:39:28,019 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-26 19:39:28,251 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-26 19:39:28,914 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-26 19:39:29,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:29,447 INFO L93 Difference]: Finished difference Result 215 states and 255 transitions. [2020-10-26 19:39:29,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-26 19:39:29,448 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-26 19:39:29,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:29,450 INFO L225 Difference]: With dead ends: 215 [2020-10-26 19:39:29,450 INFO L226 Difference]: Without dead ends: 182 [2020-10-26 19:39:29,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=864, Invalid=4538, Unknown=0, NotChecked=0, Total=5402 [2020-10-26 19:39:29,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-26 19:39:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 154. [2020-10-26 19:39:29,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-26 19:39:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 184 transitions. [2020-10-26 19:39:29,479 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 184 transitions. Word has length 61 [2020-10-26 19:39:29,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:29,480 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 184 transitions. [2020-10-26 19:39:29,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:39:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 184 transitions. [2020-10-26 19:39:29,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:39:29,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:29,481 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:29,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:39:29,481 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:29,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:29,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2049569357, now seen corresponding path program 11 times [2020-10-26 19:39:29,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:29,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999289477] [2020-10-26 19:39:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:29,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:29,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:33,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:33,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:39:33,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:39:33,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4349 [2020-10-26 19:39:33,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:33,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:39:33,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:33,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:39:33,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:34,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:34,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:34,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:34,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:34,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:34,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:34,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:34,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:34,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:34,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:34,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:34,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:34,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:34,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:34,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:34,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:34,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:34,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:34,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:34,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:34,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:34,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:39:34,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999289477] [2020-10-26 19:39:34,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:34,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:39:34,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660505552] [2020-10-26 19:39:34,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:39:34,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:34,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:39:34,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:39:34,095 INFO L87 Difference]: Start difference. First operand 154 states and 184 transitions. Second operand 16 states. [2020-10-26 19:39:34,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:34,909 INFO L93 Difference]: Finished difference Result 241 states and 282 transitions. [2020-10-26 19:39:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:39:34,912 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-26 19:39:34,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:34,913 INFO L225 Difference]: With dead ends: 241 [2020-10-26 19:39:34,913 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:39:34,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=607, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:39:34,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:39:34,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 74. [2020-10-26 19:39:34,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:39:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-10-26 19:39:34,934 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 61 [2020-10-26 19:39:34,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:34,935 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-10-26 19:39:34,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:39:34,935 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-10-26 19:39:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:39:34,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:34,936 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:34,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:39:34,936 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:34,936 INFO L82 PathProgramCache]: Analyzing trace with hash 737635863, now seen corresponding path program 10 times [2020-10-26 19:39:34,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:34,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269872355] [2020-10-26 19:39:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:34,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:34,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:35,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:35,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:35,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:35,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:36,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:36,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:36,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:37,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:38,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:38,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:38,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:39,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:39,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:39,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:39:39,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:39:39,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:39:39,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:39,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:39:39,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:39,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:39:39,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:40,874 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2020-10-26 19:39:41,138 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2020-10-26 19:39:41,505 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 49 [2020-10-26 19:39:41,835 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 47 [2020-10-26 19:39:42,425 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 50 [2020-10-26 19:39:42,799 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 51 [2020-10-26 19:39:43,339 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 66 [2020-10-26 19:39:44,146 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 76 [2020-10-26 19:39:44,932 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 77 [2020-10-26 19:39:45,660 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 64 [2020-10-26 19:39:46,003 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-10-26 19:39:46,382 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-26 19:39:46,662 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2020-10-26 19:39:47,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:47,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:47,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:47,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:47,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:47,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:47,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:47,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:47,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:47,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:47,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:47,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:47,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:47,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:39:47,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:47,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:47,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:47,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:47,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 93 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:39:47,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269872355] [2020-10-26 19:39:47,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:47,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:39:47,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923974512] [2020-10-26 19:39:47,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:39:47,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:47,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:39:47,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:39:47,257 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 28 states. [2020-10-26 19:39:48,136 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2020-10-26 19:39:48,407 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 52 [2020-10-26 19:39:48,795 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 50 [2020-10-26 19:39:49,006 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-26 19:39:49,338 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 51 [2020-10-26 19:39:49,700 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2020-10-26 19:39:50,401 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 64 [2020-10-26 19:39:50,649 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-26 19:39:51,228 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 94 [2020-10-26 19:39:51,630 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-26 19:39:51,988 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-26 19:39:52,600 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-10-26 19:39:53,475 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-26 19:39:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:53,826 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2020-10-26 19:39:53,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:39:53,827 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-26 19:39:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:53,829 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:39:53,829 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 19:39:53,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=333, Invalid=2217, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:39:53,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 19:39:53,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-26 19:39:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:39:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-10-26 19:39:53,843 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 63 [2020-10-26 19:39:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:53,843 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-10-26 19:39:53,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:39:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-10-26 19:39:53,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:39:53,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:53,844 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:53,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:39:53,844 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:53,844 INFO L82 PathProgramCache]: Analyzing trace with hash -80012587, now seen corresponding path program 11 times [2020-10-26 19:39:53,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:53,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271773467] [2020-10-26 19:39:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:53,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:53,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:53,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:53,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:54,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:54,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:54,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:54,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:54,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:58,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:58,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:58,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:58,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:39:58,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-26 19:39:58,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-26 19:39:58,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:58,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:39:58,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:58,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-26 19:39:58,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:59,333 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 29 [2020-10-26 19:39:59,688 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-26 19:40:00,159 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2020-10-26 19:40:00,312 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-26 19:40:00,681 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-26 19:40:00,934 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-26 19:40:01,217 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-26 19:40:01,496 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2020-10-26 19:40:01,760 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-26 19:40:03,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:03,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:03,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:03,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:03,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:03,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:03,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:03,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:03,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:03,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:03,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:03,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:03,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:03,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:03,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:03,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:03,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:03,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:03,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:40:03,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:03,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:40:03,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 16 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:40:03,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271773467] [2020-10-26 19:40:03,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:03,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:40:03,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517505718] [2020-10-26 19:40:03,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:40:03,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:03,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:40:03,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:40:03,135 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 35 states. [2020-10-26 19:40:04,564 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 62 [2020-10-26 19:40:04,763 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2020-10-26 19:40:05,008 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-26 19:40:05,414 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-10-26 19:40:05,658 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-26 19:40:06,136 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2020-10-26 19:40:06,445 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-26 19:40:06,751 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-26 19:40:07,105 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2020-10-26 19:40:07,462 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-26 19:40:07,679 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-26 19:40:08,098 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-26 19:40:09,584 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 75 [2020-10-26 19:40:10,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:10,587 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2020-10-26 19:40:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:40:10,588 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 63 [2020-10-26 19:40:10,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:10,589 INFO L225 Difference]: With dead ends: 107 [2020-10-26 19:40:10,589 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:40:10,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=817, Invalid=4295, Unknown=0, NotChecked=0, Total=5112 [2020-10-26 19:40:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:40:10,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2020-10-26 19:40:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:40:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-10-26 19:40:10,605 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 63 [2020-10-26 19:40:10,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:10,605 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-10-26 19:40:10,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:40:10,605 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-10-26 19:40:10,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:40:10,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:10,606 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:10,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:40:10,606 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:10,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:10,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1668360489, now seen corresponding path program 12 times [2020-10-26 19:40:10,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:10,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685389948] [2020-10-26 19:40:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:10,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:10,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:10,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:10,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:11,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:11,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:11,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:11,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:12,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:12,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:13,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:13,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:13,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:14,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:14,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:14,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:14,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:15,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:40:15,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-26 19:40:15,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:40:15,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:40:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 19:40:15,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:15,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:15,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:15,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:15,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:15,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:40:15,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:15,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:15,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:15,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:15,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:15,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:15,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:15,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:15,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:15,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:40:15,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:15,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:15,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:15,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:15,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-26 19:40:15,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685389948] [2020-10-26 19:40:15,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:15,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:40:15,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134385979] [2020-10-26 19:40:15,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:40:15,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:15,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:40:15,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:40:15,832 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 14 states. [2020-10-26 19:40:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:16,543 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2020-10-26 19:40:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:40:16,544 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-26 19:40:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:16,545 INFO L225 Difference]: With dead ends: 107 [2020-10-26 19:40:16,545 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:40:16,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:40:16,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:40:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 77. [2020-10-26 19:40:16,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:40:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-10-26 19:40:16,563 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 63 [2020-10-26 19:40:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:16,563 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-10-26 19:40:16,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:40:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-10-26 19:40:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:40:16,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:16,564 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:16,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:40:16,564 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:16,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:16,565 INFO L82 PathProgramCache]: Analyzing trace with hash 519142560, now seen corresponding path program 12 times [2020-10-26 19:40:16,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:16,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796014592] [2020-10-26 19:40:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:16,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:17,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:17,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:17,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:17,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:21,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:21,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:21,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:21,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:21,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:21,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:21,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:40:21,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-26 19:40:21,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:40:21,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:21,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:40:21,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:40:21,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:40:21,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:21,879 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 22 [2020-10-26 19:40:22,124 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2020-10-26 19:40:22,267 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2020-10-26 19:40:22,446 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-26 19:40:22,630 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-10-26 19:40:22,772 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2020-10-26 19:40:23,098 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-10-26 19:40:23,278 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-10-26 19:40:23,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:24,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:24,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:24,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:24,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:24,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:24,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:24,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:24,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:24,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:24,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:24,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:24,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:24,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:24,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:24,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:24,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:40:24,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:24,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:40:24,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 10 proven. 77 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-26 19:40:24,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796014592] [2020-10-26 19:40:24,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:24,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:40:24,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069698525] [2020-10-26 19:40:24,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:40:24,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:24,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:40:24,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:40:24,027 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 27 states. [2020-10-26 19:40:24,991 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-26 19:40:25,284 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-26 19:40:25,459 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-26 19:40:25,604 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-26 19:40:25,761 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-26 19:40:25,951 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-26 19:40:26,113 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-10-26 19:40:26,338 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-26 19:40:26,505 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-26 19:40:26,730 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-26 19:40:26,916 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2020-10-26 19:40:27,092 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-26 19:40:27,410 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-26 19:40:27,615 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2020-10-26 19:40:28,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:28,079 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2020-10-26 19:40:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:40:28,081 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-10-26 19:40:28,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:28,082 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:40:28,082 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:40:28,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=547, Invalid=2645, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:40:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:40:28,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-10-26 19:40:28,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:40:28,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-10-26 19:40:28,102 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 64 [2020-10-26 19:40:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:28,102 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-10-26 19:40:28,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:40:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-10-26 19:40:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:40:28,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:28,103 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:28,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:40:28,103 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:28,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1874321502, now seen corresponding path program 13 times [2020-10-26 19:40:28,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:28,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032037214] [2020-10-26 19:40:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:28,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:29,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:33,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:40:33,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:40:33,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:40:33,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:33,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:40:33,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:33,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:40:33,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:33,967 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2020-10-26 19:40:34,246 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-26 19:40:34,389 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-26 19:40:34,621 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-26 19:40:34,815 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-26 19:40:35,011 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-26 19:40:35,192 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-26 19:40:35,499 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 52 [2020-10-26 19:40:35,752 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2020-10-26 19:40:36,061 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-26 19:40:36,317 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-26 19:40:36,597 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-10-26 19:40:36,836 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-10-26 19:40:37,117 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-26 19:40:37,455 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-26 19:40:37,754 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-10-26 19:40:38,087 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-26 19:40:38,448 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-26 19:40:38,702 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-26 19:40:38,961 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-26 19:40:39,209 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-26 19:40:39,498 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-26 19:40:39,760 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-26 19:40:40,053 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-26 19:40:40,322 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-26 19:40:40,625 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-26 19:40:40,880 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41