/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-crafted/zero_sum_const2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:06:16,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:06:16,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:06:16,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:06:16,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:06:16,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:06:16,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:06:17,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:06:17,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:06:17,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:06:17,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:06:17,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:06:17,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:06:17,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:06:17,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:06:17,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:06:17,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:06:17,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:06:17,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:06:17,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:06:17,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:06:17,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:06:17,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:06:17,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:06:17,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:06:17,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:06:17,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:06:17,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:06:17,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:06:17,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:06:17,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:06:17,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:06:17,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:06:17,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:06:17,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:06:17,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:06:17,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:06:17,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:06:17,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:06:17,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:06:17,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:06:17,051 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 19:06:17,081 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:06:17,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:06:17,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:06:17,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:06:17,087 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:06:17,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:06:17,088 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:06:17,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:06:17,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:06:17,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:06:17,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:06:17,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:06:17,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:06:17,090 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:06:17,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:06:17,090 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:06:17,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:06:17,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:06:17,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:06:17,092 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:06:17,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:06:17,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:06:17,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:06:17,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:06:17,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:06:17,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:06:17,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:06:17,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:06:17,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:06:17,094 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:06:17,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:06:17,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:06:17,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:06:17,578 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:06:17,578 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:06:17,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2020-10-26 19:06:17,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3d706f72c/92ba4a4a08d14e1e9ea55c018724fcef/FLAGb3f15c729 [2020-10-26 19:06:18,352 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:06:18,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2020-10-26 19:06:18,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3d706f72c/92ba4a4a08d14e1e9ea55c018724fcef/FLAGb3f15c729 [2020-10-26 19:06:18,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3d706f72c/92ba4a4a08d14e1e9ea55c018724fcef [2020-10-26 19:06:18,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:06:18,722 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:06:18,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:06:18,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:06:18,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:06:18,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:06:18" (1/1) ... [2020-10-26 19:06:18,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@495092f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:18, skipping insertion in model container [2020-10-26 19:06:18,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:06:18" (1/1) ... [2020-10-26 19:06:18,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:06:18,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:06:18,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:06:18,950 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:06:18,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:06:18,990 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:06:18,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:18 WrapperNode [2020-10-26 19:06:18,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:06:18,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:06:18,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:06:18,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:06:19,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:18" (1/1) ... [2020-10-26 19:06:19,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:18" (1/1) ... [2020-10-26 19:06:19,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:18" (1/1) ... [2020-10-26 19:06:19,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:18" (1/1) ... [2020-10-26 19:06:19,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:18" (1/1) ... [2020-10-26 19:06:19,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:18" (1/1) ... [2020-10-26 19:06:19,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:18" (1/1) ... [2020-10-26 19:06:19,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:06:19,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:06:19,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:06:19,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:06:19,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:18" (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 19:06:19,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:06:19,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:06:19,127 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:06:19,128 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:06:19,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:06:19,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:06:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:06:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-26 19:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:06:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:06:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:06:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:06:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:06:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:06:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:06:19,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:06:19,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:06:19,545 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:06:19,545 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-26 19:06:19,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:06:19 BoogieIcfgContainer [2020-10-26 19:06:19,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:06:19,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:06:19,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:06:19,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:06:19,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:06:18" (1/3) ... [2020-10-26 19:06:19,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c89b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:06:19, skipping insertion in model container [2020-10-26 19:06:19,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:18" (2/3) ... [2020-10-26 19:06:19,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c89b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:06:19, skipping insertion in model container [2020-10-26 19:06:19,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:06:19" (3/3) ... [2020-10-26 19:06:19,563 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2020-10-26 19:06:19,577 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:06:19,582 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:06:19,597 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:06:19,632 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:06:19,632 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:06:19,632 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:06:19,633 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:06:19,633 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:06:19,633 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:06:19,633 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:06:19,633 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:06:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-26 19:06:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:06:19,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:19,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:19,661 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:19,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:19,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1679398581, now seen corresponding path program 1 times [2020-10-26 19:06:19,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:19,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341483456] [2020-10-26 19:06:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:19,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:20,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:20,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:20,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:20,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:20,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:21,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:21,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:06:21,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:06:21,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1543 [2020-10-26 19:06:21,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:21,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:06:21,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:21,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:06:21,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-26 19:06:21,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:21,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:21,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:21,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:21,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:21,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:06:21,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:21,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:21,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:21,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:21,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:21,584 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 19:06:21,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341483456] [2020-10-26 19:06:21,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:06:21,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 19:06:21,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683552711] [2020-10-26 19:06:21,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:06:21,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:21,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:06:21,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:06:21,614 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 6 states. [2020-10-26 19:06:21,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:21,955 INFO L93 Difference]: Finished difference Result 77 states and 108 transitions. [2020-10-26 19:06:21,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:06:21,957 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-26 19:06:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:21,966 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:06:21,966 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:06:21,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:06:21,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:06:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-26 19:06:22,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:06:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-26 19:06:22,039 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2020-10-26 19:06:22,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:22,039 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-26 19:06:22,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:06:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-26 19:06:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:06:22,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:22,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:22,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:06:22,043 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:22,044 INFO L82 PathProgramCache]: Analyzing trace with hash -203566653, now seen corresponding path program 1 times [2020-10-26 19:06:22,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:22,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739598570] [2020-10-26 19:06:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:22,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:23,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:23,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:06:23,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:06:23,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1702 [2020-10-26 19:06:23,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:23,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:06:23,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:23,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:06:23,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:23,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:23,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:23,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:23,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:23,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:23,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:06:23,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:23,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:23,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:23,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:23,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:06:23,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739598570] [2020-10-26 19:06:23,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:06:23,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:06:23,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450584456] [2020-10-26 19:06:23,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:06:23,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:23,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:06:23,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:06:23,870 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2020-10-26 19:06:24,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:24,069 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2020-10-26 19:06:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:06:24,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-26 19:06:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:24,071 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:06:24,072 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 19:06:24,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:06:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 19:06:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-10-26 19:06:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 19:06:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-26 19:06:24,088 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2020-10-26 19:06:24,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:24,089 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-26 19:06:24,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:06:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-26 19:06:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:06:24,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:24,092 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 19:06:24,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:06:24,093 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:24,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1073664907, now seen corresponding path program 1 times [2020-10-26 19:06:24,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:24,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296292576] [2020-10-26 19:06:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:24,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:25,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:25,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:25,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:26,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:26,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:26,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:29,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:29,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:06:29,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:06:29,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:06:29,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:29,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:06:29,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:29,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:06:29,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:29,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:29,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:29,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:29,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:29,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:29,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:06:29,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:29,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:29,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:29,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:29,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:06:29,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296292576] [2020-10-26 19:06:29,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:29,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:06:29,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286353498] [2020-10-26 19:06:29,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:06:29,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:29,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:06:29,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:06:29,556 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 12 states. [2020-10-26 19:06:30,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:30,161 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-26 19:06:30,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:06:30,161 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-26 19:06:30,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:30,163 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:06:30,163 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:06:30,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:06:30,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:06:30,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-26 19:06:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:06:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-26 19:06:30,174 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 31 [2020-10-26 19:06:30,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:30,175 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-26 19:06:30,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:06:30,175 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-26 19:06:30,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:06:30,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:30,177 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 19:06:30,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:06:30,177 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:30,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:30,178 INFO L82 PathProgramCache]: Analyzing trace with hash 948172045, now seen corresponding path program 2 times [2020-10-26 19:06:30,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:30,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450041981] [2020-10-26 19:06:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:30,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:35,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:35,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:06:35,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:06:35,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:06:35,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:35,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:06:35,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:35,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:06:35,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:35,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:35,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:35,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:35,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:35,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:35,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:06:35,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:35,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:35,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:35,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:35,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 19:06:35,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450041981] [2020-10-26 19:06:35,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:35,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:06:35,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785999791] [2020-10-26 19:06:35,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:06:35,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:35,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:06:35,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:06:35,310 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 6 states. [2020-10-26 19:06:35,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:35,540 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-10-26 19:06:35,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:06:35,540 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-26 19:06:35,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:35,541 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:06:35,542 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:06:35,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:06:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:06:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-26 19:06:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:06:35,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-26 19:06:35,555 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2020-10-26 19:06:35,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:35,557 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-26 19:06:35,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:06:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-26 19:06:35,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:06:35,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:35,561 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2020-10-26 19:06:35,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:06:35,561 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:35,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:35,562 INFO L82 PathProgramCache]: Analyzing trace with hash 169491669, now seen corresponding path program 3 times [2020-10-26 19:06:35,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:35,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117959919] [2020-10-26 19:06:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:35,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:35,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:36,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:37,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:38,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:38,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:39,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:39,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:40,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:40,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:40,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:40,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:06:40,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:06:40,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:06:40,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:40,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:06:40,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:40,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:06:40,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:41,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:41,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:41,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:41,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:41,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:41,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:06:41,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:41,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:41,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:41,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:41,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:06:41,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117959919] [2020-10-26 19:06:41,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:41,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:06:41,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447381933] [2020-10-26 19:06:41,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:06:41,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:41,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:06:41,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:06:41,141 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 17 states. [2020-10-26 19:06:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:41,654 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-10-26 19:06:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:06:41,654 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-26 19:06:41,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:41,655 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:06:41,656 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:06:41,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:06:41,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:06:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-10-26 19:06:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:06:41,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-26 19:06:41,673 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 41 [2020-10-26 19:06:41,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:41,674 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-26 19:06:41,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:06:41,674 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-26 19:06:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:06:41,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:41,676 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2020-10-26 19:06:41,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:06:41,676 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:41,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:41,677 INFO L82 PathProgramCache]: Analyzing trace with hash -92060713, now seen corresponding path program 4 times [2020-10-26 19:06:41,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:41,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294650512] [2020-10-26 19:06:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:41,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:41,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:41,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:41,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:46,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:46,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:06:46,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:06:46,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:06:46,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:06:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:46,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:06:46,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:46,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:46,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:46,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:46,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:46,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:46,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:06:46,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:46,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:46,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:46,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:46,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:06:46,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294650512] [2020-10-26 19:06:46,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:46,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:06:46,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156585940] [2020-10-26 19:06:46,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:06:46,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:46,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:06:46,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:06:46,815 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 10 states. [2020-10-26 19:06:47,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:47,242 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2020-10-26 19:06:47,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:06:47,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-26 19:06:47,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:47,244 INFO L225 Difference]: With dead ends: 125 [2020-10-26 19:06:47,245 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:06:47,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:06:47,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:06:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2020-10-26 19:06:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:06:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-10-26 19:06:47,257 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 43 [2020-10-26 19:06:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:47,257 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-10-26 19:06:47,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:06:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-10-26 19:06:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:06:47,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:47,259 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-26 19:06:47,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:06:47,259 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:47,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:47,260 INFO L82 PathProgramCache]: Analyzing trace with hash 638925081, now seen corresponding path program 5 times [2020-10-26 19:06:47,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:47,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36579113] [2020-10-26 19:06:47,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:47,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:47,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:47,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:47,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:49,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:49,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:52,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:52,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:06:52,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:06:52,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:06:52,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:52,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:06:52,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:52,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:06:52,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:52,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:52,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:52,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:52,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:52,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:52,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:06:52,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:52,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:52,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:52,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:52,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 19:06:52,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36579113] [2020-10-26 19:06:52,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:52,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:06:52,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234668199] [2020-10-26 19:06:52,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:06:52,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:52,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:06:52,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:06:52,389 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 10 states. [2020-10-26 19:06:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:52,809 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-26 19:06:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:06:52,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-26 19:06:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:52,812 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:06:52,812 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:06:52,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:06:52,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:06:52,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-26 19:06:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:06:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-26 19:06:52,821 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 45 [2020-10-26 19:06:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:52,822 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-26 19:06:52,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:06:52,822 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-26 19:06:52,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:06:52,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:52,823 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-26 19:06:52,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:06:52,823 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:52,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:52,824 INFO L82 PathProgramCache]: Analyzing trace with hash -22589025, now seen corresponding path program 6 times [2020-10-26 19:06:52,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:52,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817804693] [2020-10-26 19:06:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:52,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:53,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:53,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:54,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:55,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:55,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:56,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:56,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:57,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:57,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:57,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:57,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:06:57,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:06:57,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-26 19:06:57,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:57,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:06:57,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:57,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 19:06:57,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:59,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:59,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:59,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:59,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:59,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:59,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:06:59,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:59,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:06:59,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817804693] [2020-10-26 19:06:59,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:59,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:06:59,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723247994] [2020-10-26 19:06:59,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:06:59,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:59,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:06:59,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:06:59,927 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 33 states. [2020-10-26 19:07:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:02,398 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2020-10-26 19:07:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:07:02,399 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 51 [2020-10-26 19:07:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:02,400 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:07:02,400 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:07:02,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=185, Invalid=2167, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:07:02,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:07:02,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2020-10-26 19:07:02,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:07:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2020-10-26 19:07:02,436 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 51 [2020-10-26 19:07:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:02,436 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2020-10-26 19:07:02,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:07:02,436 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2020-10-26 19:07:02,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:07:02,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:02,440 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2020-10-26 19:07:02,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:07:02,440 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:02,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:02,441 INFO L82 PathProgramCache]: Analyzing trace with hash 791895585, now seen corresponding path program 7 times [2020-10-26 19:07:02,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:02,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760815374] [2020-10-26 19:07:02,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:02,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:02,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:02,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:03,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:07,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:07,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:07:07,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:07:07,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:07:07,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:07,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:07:07,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:07,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:07:07,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:07,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:07,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:07,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:07,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:07,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:07,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:07:07,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:07,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 19:07:07,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760815374] [2020-10-26 19:07:07,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:07,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:07:07,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884705870] [2020-10-26 19:07:07,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:07:07,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:07,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:07:07,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:07:07,590 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 12 states. [2020-10-26 19:07:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:08,048 INFO L93 Difference]: Finished difference Result 153 states and 169 transitions. [2020-10-26 19:07:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:07:08,049 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-26 19:07:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:08,051 INFO L225 Difference]: With dead ends: 153 [2020-10-26 19:07:08,051 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:07:08,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:07:08,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:07:08,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2020-10-26 19:07:08,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:07:08,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-10-26 19:07:08,077 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 53 [2020-10-26 19:07:08,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:08,078 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-10-26 19:07:08,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:07:08,078 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-10-26 19:07:08,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:07:08,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:08,085 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-10-26 19:07:08,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:07:08,086 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:08,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:08,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1991760099, now seen corresponding path program 8 times [2020-10-26 19:07:08,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:08,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746226486] [2020-10-26 19:07:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:08,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:08,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:08,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:08,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:08,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:09,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:13,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:13,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:07:13,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:07:13,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:07:13,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:13,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:07:13,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:13,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:07:13,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:13,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:13,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:13,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:13,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:13,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:13,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:07:13,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:13,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:13,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:13,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:13,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-26 19:07:13,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746226486] [2020-10-26 19:07:13,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:13,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:07:13,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033844628] [2020-10-26 19:07:13,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:07:13,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:13,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:07:13,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:07:13,249 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 12 states. [2020-10-26 19:07:13,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:13,677 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-26 19:07:13,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:07:13,677 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-26 19:07:13,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:13,679 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:07:13,679 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:07:13,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:07:13,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:07:13,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-26 19:07:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:07:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-26 19:07:13,695 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 55 [2020-10-26 19:07:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:13,695 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-26 19:07:13,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:07:13,696 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-26 19:07:13,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:07:13,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:13,697 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2020-10-26 19:07:13,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:07:13,697 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:13,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:13,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1839353367, now seen corresponding path program 9 times [2020-10-26 19:07:13,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:13,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654369963] [2020-10-26 19:07:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:13,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:14,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:14,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:15,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:16,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:16,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:17,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:17,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:18,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:18,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:18,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:07:18,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:07:18,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:07:18,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:18,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:07:18,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:18,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-26 19:07:18,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:21,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:21,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:21,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:21,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:21,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:21,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:07:21,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:21,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:21,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:21,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:21,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:07:21,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654369963] [2020-10-26 19:07:21,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:21,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:07:21,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866400284] [2020-10-26 19:07:21,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:07:21,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:21,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:07:21,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1754, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:07:21,234 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 44 states. [2020-10-26 19:07:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:24,942 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-10-26 19:07:24,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:07:24,943 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 61 [2020-10-26 19:07:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:24,944 INFO L225 Difference]: With dead ends: 111 [2020-10-26 19:07:24,945 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:07:24,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=299, Invalid=4123, Unknown=0, NotChecked=0, Total=4422 [2020-10-26 19:07:24,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:07:24,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-10-26 19:07:24,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:07:24,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2020-10-26 19:07:24,963 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 61 [2020-10-26 19:07:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:24,969 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2020-10-26 19:07:24,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:07:24,969 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2020-10-26 19:07:24,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:07:24,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:24,971 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2020-10-26 19:07:24,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:07:24,971 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:24,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:24,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1826874347, now seen corresponding path program 10 times [2020-10-26 19:07:24,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:24,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371949776] [2020-10-26 19:07:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:25,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:25,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:25,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:26,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:30,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:30,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:07:30,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:07:30,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:07:30,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:30,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:07:30,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:30,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:07:30,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:30,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:30,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:30,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:30,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:30,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:30,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:07:30,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:30,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:30,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:07:30,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371949776] [2020-10-26 19:07:30,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:30,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:07:30,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075372141] [2020-10-26 19:07:30,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:07:30,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:30,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:07:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:07:30,180 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand 14 states. [2020-10-26 19:07:30,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:30,758 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2020-10-26 19:07:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:07:30,759 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-26 19:07:30,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:30,760 INFO L225 Difference]: With dead ends: 191 [2020-10-26 19:07:30,760 INFO L226 Difference]: Without dead ends: 113 [2020-10-26 19:07:30,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:07:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-26 19:07:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 100. [2020-10-26 19:07:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:07:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-10-26 19:07:30,788 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 63 [2020-10-26 19:07:30,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:30,789 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-10-26 19:07:30,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:07:30,789 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-10-26 19:07:30,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:07:30,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:30,793 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2020-10-26 19:07:30,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:07:30,793 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:30,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:30,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1230019371, now seen corresponding path program 11 times [2020-10-26 19:07:30,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:30,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140572097] [2020-10-26 19:07:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:30,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:30,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:30,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:31,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:35,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:35,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:07:35,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:07:35,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:07:35,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:35,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:07:35,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:35,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:07:35,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:35,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:35,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:35,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:35,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:35,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:35,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:07:35,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:35,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:35,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:35,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:35,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:07:35,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140572097] [2020-10-26 19:07:35,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:35,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:07:35,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356602800] [2020-10-26 19:07:35,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:07:35,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:35,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:07:35,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:07:35,991 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 14 states. [2020-10-26 19:07:36,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:36,509 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2020-10-26 19:07:36,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:07:36,510 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-26 19:07:36,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:36,511 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:07:36,511 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:07:36,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:07:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:07:36,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-26 19:07:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:07:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-26 19:07:36,524 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 63 [2020-10-26 19:07:36,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:36,525 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-26 19:07:36,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:07:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-26 19:07:36,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:07:36,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:36,533 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2020-10-26 19:07:36,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:07:36,533 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:36,535 INFO L82 PathProgramCache]: Analyzing trace with hash 585956787, now seen corresponding path program 12 times [2020-10-26 19:07:36,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:36,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606243186] [2020-10-26 19:07:36,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:36,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:37,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:38,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:39,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:39,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:40,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:41,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:41,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:41,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:07:41,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:07:41,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5162 [2020-10-26 19:07:41,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:41,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-26 19:07:41,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:41,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 19:07:41,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:46,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:46,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:46,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:46,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:46,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:46,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:07:46,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:46,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:46,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:46,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:46,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 28 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:07:46,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606243186] [2020-10-26 19:07:46,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:46,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-26 19:07:46,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328680] [2020-10-26 19:07:46,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-26 19:07:46,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:46,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-26 19:07:46,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=2310, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:07:46,466 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 52 states. [2020-10-26 19:07:46,711 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-26 19:07:48,072 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-26 19:07:48,518 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-26 19:07:48,734 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-26 19:07:48,957 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-10-26 19:07:49,302 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-26 19:07:49,924 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-26 19:07:50,974 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-26 19:07:51,273 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2020-10-26 19:07:51,488 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-26 19:07:53,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:53,052 INFO L93 Difference]: Finished difference Result 144 states and 156 transitions. [2020-10-26 19:07:53,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:07:53,053 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 71 [2020-10-26 19:07:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:53,054 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:07:53,054 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:07:53,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=854, Invalid=5788, Unknown=0, NotChecked=0, Total=6642 [2020-10-26 19:07:53,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:07:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-26 19:07:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:07:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-26 19:07:53,067 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 71 [2020-10-26 19:07:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:53,067 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-26 19:07:53,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-26 19:07:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-26 19:07:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:07:53,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:53,068 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 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] [2020-10-26 19:07:53,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:07:53,069 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash -586761099, now seen corresponding path program 13 times [2020-10-26 19:07:53,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:53,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834246124] [2020-10-26 19:07:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:53,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:53,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:53,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:54,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:58,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:58,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:07:58,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:07:58,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:07:58,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:58,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:07:58,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:58,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:07:58,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:58,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:58,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:58,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:58,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:58,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:58,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:07:58,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:58,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:58,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:58,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:58,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:07:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-26 19:07:58,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834246124] [2020-10-26 19:07:58,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:58,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:07:58,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086646225] [2020-10-26 19:07:58,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:07:58,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:58,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:07:58,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:07:58,326 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 16 states. [2020-10-26 19:07:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:59,213 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-10-26 19:07:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:07:59,214 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-26 19:07:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:59,215 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:07:59,215 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:07:59,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:07:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:07:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-26 19:07:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:07:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-26 19:07:59,227 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 73 [2020-10-26 19:07:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:59,227 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-26 19:07:59,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:07:59,227 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-26 19:07:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:07:59,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:59,228 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2020-10-26 19:07:59,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:07:59,228 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:59,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:59,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1594043139, now seen corresponding path program 14 times [2020-10-26 19:07:59,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:59,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877001467] [2020-10-26 19:07:59,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:59,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:00,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:01,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:02,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:03,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:04,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:04,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:08:04,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:08:04,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-26 19:08:04,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:04,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-26 19:08:04,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:04,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 19:08:04,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:10,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:10,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:10,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:10,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:10,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:10,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:08:10,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:10,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:10,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:10,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:10,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 6 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:08:10,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877001467] [2020-10-26 19:08:10,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:10,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-26 19:08:10,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179273960] [2020-10-26 19:08:10,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-26 19:08:10,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:10,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-26 19:08:10,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=3577, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:08:10,139 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 63 states. [2020-10-26 19:08:12,923 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-26 19:08:14,267 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 75 [2020-10-26 19:08:14,574 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-10-26 19:08:15,539 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-26 19:08:16,313 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-26 19:08:16,670 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-26 19:08:17,343 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2020-10-26 19:08:17,863 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-26 19:08:18,157 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2020-10-26 19:08:18,458 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-26 19:08:18,996 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-10-26 19:08:20,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:20,372 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2020-10-26 19:08:20,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-26 19:08:20,372 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 81 [2020-10-26 19:08:20,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:20,375 INFO L225 Difference]: With dead ends: 160 [2020-10-26 19:08:20,376 INFO L226 Difference]: Without dead ends: 154 [2020-10-26 19:08:20,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2319 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=906, Invalid=9600, Unknown=0, NotChecked=0, Total=10506 [2020-10-26 19:08:20,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-26 19:08:20,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 129. [2020-10-26 19:08:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-26 19:08:20,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 137 transitions. [2020-10-26 19:08:20,394 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 137 transitions. Word has length 81 [2020-10-26 19:08:20,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:20,395 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 137 transitions. [2020-10-26 19:08:20,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-26 19:08:20,395 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 137 transitions. [2020-10-26 19:08:20,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:08:20,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:20,396 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 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] [2020-10-26 19:08:20,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:08:20,396 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:20,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1518712257, now seen corresponding path program 15 times [2020-10-26 19:08:20,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:20,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888238119] [2020-10-26 19:08:20,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:20,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:20,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:20,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:20,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:25,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:25,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:08:25,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:08:25,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:08:25,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:25,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:08:25,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:25,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:08:25,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:25,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:25,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:25,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:25,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:25,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:25,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:08:25,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:25,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:25,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:25,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:25,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-26 19:08:25,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888238119] [2020-10-26 19:08:25,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:25,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:08:25,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639609543] [2020-10-26 19:08:25,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:08:25,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:25,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:08:25,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:08:25,669 INFO L87 Difference]: Start difference. First operand 129 states and 137 transitions. Second operand 18 states. [2020-10-26 19:08:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:26,631 INFO L93 Difference]: Finished difference Result 270 states and 289 transitions. [2020-10-26 19:08:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:08:26,632 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-26 19:08:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:26,634 INFO L225 Difference]: With dead ends: 270 [2020-10-26 19:08:26,634 INFO L226 Difference]: Without dead ends: 145 [2020-10-26 19:08:26,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:08:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-26 19:08:26,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2020-10-26 19:08:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-26 19:08:26,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 139 transitions. [2020-10-26 19:08:26,649 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 139 transitions. Word has length 83 [2020-10-26 19:08:26,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:26,649 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 139 transitions. [2020-10-26 19:08:26,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:08:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 139 transitions. [2020-10-26 19:08:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:08:26,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:26,650 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 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] [2020-10-26 19:08:26,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:08:26,651 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:26,651 INFO L82 PathProgramCache]: Analyzing trace with hash -506427073, now seen corresponding path program 16 times [2020-10-26 19:08:26,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:26,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58303187] [2020-10-26 19:08:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:26,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:26,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:26,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:29,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:31,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:31,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:08:31,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:08:31,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:08:31,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:08:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:08:31,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:31,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:31,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:31,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:31,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:31,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:31,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:08:31,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:31,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:31,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-26 19:08:31,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58303187] [2020-10-26 19:08:31,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:31,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:08:31,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998280860] [2020-10-26 19:08:31,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:08:31,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:31,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:08:31,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:08:31,963 INFO L87 Difference]: Start difference. First operand 132 states and 139 transitions. Second operand 18 states. [2020-10-26 19:08:32,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:32,983 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2020-10-26 19:08:32,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:08:32,984 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-26 19:08:32,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:32,985 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:08:32,986 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:08:32,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:08:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:08:32,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-26 19:08:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:08:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-10-26 19:08:32,998 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 83 [2020-10-26 19:08:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:32,998 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-10-26 19:08:32,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:08:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-10-26 19:08:32,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:08:32,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:32,999 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:08:32,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:08:32,999 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:33,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:33,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1171466297, now seen corresponding path program 17 times [2020-10-26 19:08:33,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:33,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474233185] [2020-10-26 19:08:33,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:33,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:33,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:35,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:37,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:38,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:38,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:08:38,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:08:38,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-26 19:08:38,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:38,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-26 19:08:38,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:38,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 19:08:38,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:38,962 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-26 19:08:39,133 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-26 19:08:44,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:44,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:44,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:44,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:44,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:44,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:08:44,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:44,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:44,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:44,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:44,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-26 19:08:44,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474233185] [2020-10-26 19:08:44,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:44,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-26 19:08:44,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310233506] [2020-10-26 19:08:44,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-26 19:08:44,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:44,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-26 19:08:44,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3626, Unknown=0, NotChecked=0, Total=3782 [2020-10-26 19:08:44,595 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 62 states. [2020-10-26 19:08:44,909 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-26 19:08:45,790 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-26 19:08:48,796 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 147 [2020-10-26 19:08:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:53,087 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2020-10-26 19:08:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:08:53,088 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 91 [2020-10-26 19:08:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:53,090 INFO L225 Difference]: With dead ends: 152 [2020-10-26 19:08:53,090 INFO L226 Difference]: Without dead ends: 146 [2020-10-26 19:08:53,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=340, Invalid=6800, Unknown=0, NotChecked=0, Total=7140 [2020-10-26 19:08:53,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-26 19:08:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 129. [2020-10-26 19:08:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-26 19:08:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 136 transitions. [2020-10-26 19:08:53,108 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 136 transitions. Word has length 91 [2020-10-26 19:08:53,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:53,108 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 136 transitions. [2020-10-26 19:08:53,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-26 19:08:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 136 transitions. [2020-10-26 19:08:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:08:53,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:53,109 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:08:53,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:08:53,110 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:53,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:53,110 INFO L82 PathProgramCache]: Analyzing trace with hash 463223369, now seen corresponding path program 18 times [2020-10-26 19:08:53,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:53,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979912232] [2020-10-26 19:08:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:53,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:53,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:53,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:58,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:58,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:08:58,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:08:58,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:08:58,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:58,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:08:58,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:58,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:08:58,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:58,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:58,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:58,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:58,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:58,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:58,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:08:58,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:58,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:58,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:58,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:58,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-26 19:08:58,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979912232] [2020-10-26 19:08:58,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:58,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:08:58,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799488040] [2020-10-26 19:08:58,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:08:58,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:58,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:08:58,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:08:58,532 INFO L87 Difference]: Start difference. First operand 129 states and 136 transitions. Second operand 20 states. [2020-10-26 19:08:59,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:59,761 INFO L93 Difference]: Finished difference Result 265 states and 281 transitions. [2020-10-26 19:08:59,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:08:59,763 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-10-26 19:08:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:59,765 INFO L225 Difference]: With dead ends: 265 [2020-10-26 19:08:59,765 INFO L226 Difference]: Without dead ends: 145 [2020-10-26 19:08:59,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:08:59,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-26 19:08:59,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2020-10-26 19:08:59,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-26 19:08:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 138 transitions. [2020-10-26 19:08:59,783 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 138 transitions. Word has length 93 [2020-10-26 19:08:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:59,783 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 138 transitions. [2020-10-26 19:08:59,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:08:59,783 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 138 transitions. [2020-10-26 19:08:59,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:08:59,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:59,785 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:08:59,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:08:59,785 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:59,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1038224139, now seen corresponding path program 19 times [2020-10-26 19:08:59,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:59,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542534404] [2020-10-26 19:08:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:59,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:59,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:59,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:04,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:04,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:04,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:09:04,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:09:04,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:09:04,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:04,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:09:04,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:09:04,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:09:04,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:05,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:09:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:05,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:05,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:05,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:09:05,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:09:05,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:09:05,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:09:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:09:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:09:05,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-26 19:09:05,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542534404] [2020-10-26 19:09:05,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:09:05,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:09:05,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333305165] [2020-10-26 19:09:05,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:09:05,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:09:05,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:09:05,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:09:05,226 INFO L87 Difference]: Start difference. First operand 132 states and 138 transitions. Second operand 20 states. [2020-10-26 19:09:06,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:09:06,813 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-10-26 19:09:06,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:09:06,814 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2020-10-26 19:09:06,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:09:06,816 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:09:06,816 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:09:06,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:09:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:09:06,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-26 19:09:06,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:09:06,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-26 19:09:06,831 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 95 [2020-10-26 19:09:06,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:09:06,831 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-26 19:09:06,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:09:06,831 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-26 19:09:06,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:09:06,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:09:06,833 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:09:06,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:09:06,833 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:09:06,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:09:06,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2095798767, now seen corresponding path program 20 times [2020-10-26 19:09:06,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:09:06,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119237312] [2020-10-26 19:09:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:09:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:06,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:08,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:11,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:12,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:12,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:09:12,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:09:12,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5503 [2020-10-26 19:09:12,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:12,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 78 [2020-10-26 19:09:12,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:09:12,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 19:09:12,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:14,130 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-10-26 19:09:14,380 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-10-26 19:09:14,610 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-26 19:09:14,870 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-26 19:09:15,141 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-26 19:09:15,451 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-26 19:09:15,729 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-26 19:09:16,104 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2020-10-26 19:09:16,478 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2020-10-26 19:09:16,839 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2020-10-26 19:09:17,203 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2020-10-26 19:09:17,598 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2020-10-26 19:09:17,982 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 42 [2020-10-26 19:09:18,434 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-10-26 19:09:18,920 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2020-10-26 19:09:19,335 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2020-10-26 19:09:19,803 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-10-26 19:09:20,222 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2020-10-26 19:09:20,647 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2020-10-26 19:09:21,114 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-26 19:09:21,609 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2020-10-26 19:09:22,065 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2020-10-26 19:09:22,468 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-10-26 19:09:23,002 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 46 [2020-10-26 19:09:23,554 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 48 [2020-10-26 19:09:23,960 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-26 19:09:24,428 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2020-10-26 19:09:24,928 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-10-26 19:09:25,451 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2020-10-26 19:09:25,969 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2020-10-26 19:09:26,530 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2020-10-26 19:09:27,040 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2020-10-26 19:09:27,553 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-10-26 19:09:28,091 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2020-10-26 19:09:28,801 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2020-10-26 19:09:29,345 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-26 19:09:29,874 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-26 19:09:30,387 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-26 19:09:31,204 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2020-10-26 19:09:31,774 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2020-10-26 19:09:32,311 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-26 19:09:32,779 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-10-26 19:09:33,287 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-10-26 19:09:33,758 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2020-10-26 19:09:34,273 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-26 19:09:34,787 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-10-26 19:09:35,291 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-26 19:09:35,800 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-10-26 19:09:36,270 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-10-26 19:09:36,743 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2020-10-26 19:09:37,204 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-10-26 19:09:38,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:09:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:38,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:38,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:38,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:09:38,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:09:38,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:09:38,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:38,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:09:38,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:09:38,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:09:38,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 42 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:09:39,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119237312] [2020-10-26 19:09:39,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:09:39,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-26 19:09:39,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000671576] [2020-10-26 19:09:39,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-26 19:09:39,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:09:39,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-26 19:09:39,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=5824, Unknown=0, NotChecked=0, Total=6162 [2020-10-26 19:09:39,089 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 79 states. [2020-10-26 19:09:39,688 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 3 [2020-10-26 19:09:40,533 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 39 [2020-10-26 19:09:41,787 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 66 [2020-10-26 19:09:42,350 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-26 19:09:43,906 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2020-10-26 19:09:44,649 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2020-10-26 19:09:45,520 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2020-10-26 19:09:46,290 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2020-10-26 19:09:47,210 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2020-10-26 19:09:47,950 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-10-26 19:09:48,808 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-26 19:09:49,655 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-10-26 19:09:50,654 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2020-10-26 19:09:51,932 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2020-10-26 19:09:53,245 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 110 [2020-10-26 19:09:54,537 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 104 [2020-10-26 19:09:55,860 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 94 [2020-10-26 19:09:56,829 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2020-10-26 19:09:57,507 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-10-26 19:09:58,339 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2020-10-26 19:09:58,742 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2020-10-26 19:09:59,418 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-26 19:10:00,071 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-26 19:10:00,754 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-26 19:10:01,377 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-26 19:10:02,014 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-26 19:10:02,638 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-26 19:10:03,305 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-10-26 19:10:03,978 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-26 19:10:04,656 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61