/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/s3lif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:41:34,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:41:34,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:41:34,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:41:34,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:41:34,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:41:34,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:41:34,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:41:34,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:41:35,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:41:35,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:41:35,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:41:35,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:41:35,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:41:35,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:41:35,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:41:35,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:41:35,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:41:35,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:41:35,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:41:35,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:41:35,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:41:35,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:41:35,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:41:35,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:41:35,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:41:35,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:41:35,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:41:35,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:41:35,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:41:35,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:41:35,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:41:35,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:41:35,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:41:35,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:41:35,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:41:35,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:41:35,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:41:35,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:41:35,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:41:35,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:41:35,080 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 19:41:35,135 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:41:35,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:41:35,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:41:35,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:41:35,141 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:41:35,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:41:35,141 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:41:35,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:41:35,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:41:35,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:41:35,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:41:35,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:41:35,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:41:35,144 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:41:35,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:41:35,144 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:41:35,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:41:35,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:41:35,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:41:35,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:41:35,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:41:35,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:41:35,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:41:35,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:41:35,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:41:35,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:41:35,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:41:35,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:41:35,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:41:35,147 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:41:35,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:41:35,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:41:35,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:41:35,626 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:41:35,627 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:41:35,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s3lif.c [2020-10-26 19:41:35,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6008186fd/3b7bde3edefe44b5b5802235f545824a/FLAGd17de93a6 [2020-10-26 19:41:36,299 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:41:36,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s3lif.c [2020-10-26 19:41:36,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6008186fd/3b7bde3edefe44b5b5802235f545824a/FLAGd17de93a6 [2020-10-26 19:41:36,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6008186fd/3b7bde3edefe44b5b5802235f545824a [2020-10-26 19:41:36,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:41:36,674 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:41:36,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:41:36,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:41:36,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:41:36,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:41:36" (1/1) ... [2020-10-26 19:41:36,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ed8eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:41:36, skipping insertion in model container [2020-10-26 19:41:36,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:41:36" (1/1) ... [2020-10-26 19:41:36,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:41:36,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:41:36,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:41:36,905 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:41:36,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:41:36,952 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:41:36,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:41:36 WrapperNode [2020-10-26 19:41:36,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:41:36,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:41:36,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:41:36,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:41:36,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:41:36" (1/1) ... [2020-10-26 19:41:36,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:41:36" (1/1) ... [2020-10-26 19:41:36,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:41:36" (1/1) ... [2020-10-26 19:41:36,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:41:36" (1/1) ... [2020-10-26 19:41:37,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:41:36" (1/1) ... [2020-10-26 19:41:37,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:41:36" (1/1) ... [2020-10-26 19:41:37,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:41:36" (1/1) ... [2020-10-26 19:41:37,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:41:37,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:41:37,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:41:37,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:41:37,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:41:36" (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 19:41:37,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:41:37,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:41:37,116 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:41:37,116 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:41:37,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:41:37,117 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:41:37,117 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:41:37,117 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:41:37,117 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:41:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:41:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:41:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:41:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:41:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:41:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:41:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:41:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:41:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:41:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:41:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:41:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:41:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:41:37,655 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:41:37,655 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:41:37,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:41:37 BoogieIcfgContainer [2020-10-26 19:41:37,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:41:37,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:41:37,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:41:37,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:41:37,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:41:36" (1/3) ... [2020-10-26 19:41:37,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7991bc6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:41:37, skipping insertion in model container [2020-10-26 19:41:37,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:41:36" (2/3) ... [2020-10-26 19:41:37,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7991bc6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:41:37, skipping insertion in model container [2020-10-26 19:41:37,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:41:37" (3/3) ... [2020-10-26 19:41:37,667 INFO L111 eAbstractionObserver]: Analyzing ICFG s3lif.c [2020-10-26 19:41:37,682 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:41:37,687 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:41:37,703 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:41:37,735 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:41:37,735 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:41:37,735 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:41:37,735 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:41:37,736 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:41:37,736 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:41:37,736 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:41:37,736 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:41:37,755 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-26 19:41:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:41:37,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:37,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:37,764 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:37,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:37,771 INFO L82 PathProgramCache]: Analyzing trace with hash 371341983, now seen corresponding path program 1 times [2020-10-26 19:41:37,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:37,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990673963] [2020-10-26 19:41:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:37,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:38,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:38,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:38,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:38,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:38,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:41:38,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:41:38,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 943 [2020-10-26 19:41:38,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:38,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:41:38,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:41:38,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:41:38,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:41:38,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:39,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:39,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:39,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:39,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:39,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:41:39,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:39,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:39,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:39,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:39,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:39,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:39,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:39,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:39,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:39,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:39,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:41:39,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:41:39,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:39,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:41:39,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:39,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:41:39,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:39,073 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 19:41:39,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990673963] [2020-10-26 19:41:39,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:41:39,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:41:39,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177259614] [2020-10-26 19:41:39,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:41:39,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:39,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:41:39,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:41:39,109 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2020-10-26 19:41:39,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:39,495 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2020-10-26 19:41:39,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:41:39,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-26 19:41:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:39,520 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:41:39,523 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:41:39,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:41:39,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:41:39,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-10-26 19:41:39,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 19:41:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-26 19:41:39,602 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-26 19:41:39,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:39,604 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-26 19:41:39,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:41:39,605 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-26 19:41:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:41:39,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:39,607 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 19:41:39,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:41:39,608 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:39,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:39,611 INFO L82 PathProgramCache]: Analyzing trace with hash -2090381425, now seen corresponding path program 1 times [2020-10-26 19:41:39,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:39,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278078640] [2020-10-26 19:41:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:39,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:39,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:40,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:40,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:40,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:40,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:40,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:41,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:43,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:43,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:41:43,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:41:43,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3340 [2020-10-26 19:41:43,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:43,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:41:43,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:43,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:41:43,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:43,345 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2020-10-26 19:41:43,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:43,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:43,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:43,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:43,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:43,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:41:43,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:43,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:43,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:43,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:43,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:43,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:43,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:43,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:43,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:43,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:43,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:41:43,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:43,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:43,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:43,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:43,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:41:43,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278078640] [2020-10-26 19:41:43,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:43,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:41:43,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922874961] [2020-10-26 19:41:43,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:41:43,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:43,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:41:43,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:41:43,832 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 16 states. [2020-10-26 19:41:45,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:45,325 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-26 19:41:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:41:45,326 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-26 19:41:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:45,328 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:41:45,328 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:41:45,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:41:45,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:41:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-10-26 19:41:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:41:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-26 19:41:45,352 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2020-10-26 19:41:45,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:45,354 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-26 19:41:45,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:41:45,354 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-26 19:41:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:41:45,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:45,356 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 19:41:45,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:41:45,357 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:45,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:45,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1617779857, now seen corresponding path program 1 times [2020-10-26 19:41:45,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:45,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051446155] [2020-10-26 19:41:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:45,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:45,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:45,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:46,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:46,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:46,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:41:46,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:41:46,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1552 [2020-10-26 19:41:46,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:46,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:41:46,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:46,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:41:46,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:47,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:47,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:47,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:47,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:47,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:47,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:41:47,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:47,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:47,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:47,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:47,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:47,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:47,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:47,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:47,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:47,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:47,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:41:47,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:47,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:47,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:47,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:47,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:41:47,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051446155] [2020-10-26 19:41:47,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:47,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:41:47,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697016262] [2020-10-26 19:41:47,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:41:47,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:47,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:41:47,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:41:47,124 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-10-26 19:41:47,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:47,525 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2020-10-26 19:41:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:41:47,525 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-26 19:41:47,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:47,527 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:41:47,527 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:41:47,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:41:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:41:47,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2020-10-26 19:41:47,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:41:47,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-26 19:41:47,539 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2020-10-26 19:41:47,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:47,539 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-26 19:41:47,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:41:47,540 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-26 19:41:47,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:41:47,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:47,541 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 19:41:47,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:41:47,541 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:47,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:47,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1912294515, now seen corresponding path program 2 times [2020-10-26 19:41:47,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:47,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388678057] [2020-10-26 19:41:47,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:47,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:47,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:48,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:48,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:41:48,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:41:48,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-10-26 19:41:48,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:48,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:41:48,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:48,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:41:48,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:48,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:48,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:48,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:48,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:48,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:48,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:41:48,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:48,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:48,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:48,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:48,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:48,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:48,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:48,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:48,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:48,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:48,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:41:48,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:48,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:48,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:48,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:48,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:41:48,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388678057] [2020-10-26 19:41:48,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:48,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:41:48,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424291529] [2020-10-26 19:41:48,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:41:48,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:48,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:41:48,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:41:48,442 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 8 states. [2020-10-26 19:41:48,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:48,717 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2020-10-26 19:41:48,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:41:48,718 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-26 19:41:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:48,719 INFO L225 Difference]: With dead ends: 97 [2020-10-26 19:41:48,719 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:41:48,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:41:48,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:41:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2020-10-26 19:41:48,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:41:48,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-26 19:41:48,730 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 33 [2020-10-26 19:41:48,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:48,731 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-26 19:41:48,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:41:48,731 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-26 19:41:48,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:41:48,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:48,732 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:48,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:41:48,733 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:48,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:48,733 INFO L82 PathProgramCache]: Analyzing trace with hash 234001266, now seen corresponding path program 1 times [2020-10-26 19:41:48,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:48,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283510894] [2020-10-26 19:41:48,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:48,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:48,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:48,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:48,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:49,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:49,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:50,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:53,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:53,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:41:53,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:41:53,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4877 [2020-10-26 19:41:53,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:53,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:41:53,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:53,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:41:53,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:53,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:53,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:53,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:53,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:53,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:53,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:41:53,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:53,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:53,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:53,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:53,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:41:53,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:53,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:53,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:53,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:53,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:53,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:41:53,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:53,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:53,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:53,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:53,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 19:41:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:41:53,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283510894] [2020-10-26 19:41:53,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:53,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:41:53,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474641411] [2020-10-26 19:41:53,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:41:53,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:53,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:41:53,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:41:53,995 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 13 states. [2020-10-26 19:41:54,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:54,993 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-10-26 19:41:54,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:41:54,994 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-26 19:41:54,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:54,995 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:41:54,995 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:41:54,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:41:54,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:41:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2020-10-26 19:41:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:41:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-26 19:41:55,005 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 36 [2020-10-26 19:41:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:55,006 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-26 19:41:55,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:41:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-26 19:41:55,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:41:55,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:55,007 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:55,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:41:55,008 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:55,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:55,008 INFO L82 PathProgramCache]: Analyzing trace with hash -283658706, now seen corresponding path program 3 times [2020-10-26 19:41:55,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:55,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410161606] [2020-10-26 19:41:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:55,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:55,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:55,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:56,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:56,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:57,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:57,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:57,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:58,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:59,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:59,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:59,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:00,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:00,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:42:00,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:42:00,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:42:00,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:00,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:42:00,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:00,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:42:00,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:00,544 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-26 19:42:00,674 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-26 19:42:01,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:01,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:01,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:01,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:01,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:01,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:42:01,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:01,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:01,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:01,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:01,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:01,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:01,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:01,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:01,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:01,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:01,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:01,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:01,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:01,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:42:01,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410161606] [2020-10-26 19:42:01,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:01,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:42:01,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023354751] [2020-10-26 19:42:01,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:42:01,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:01,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:42:01,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:42:01,695 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 21 states. [2020-10-26 19:42:02,426 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-26 19:42:03,357 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-26 19:42:06,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:06,152 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-26 19:42:06,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:42:06,153 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2020-10-26 19:42:06,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:06,155 INFO L225 Difference]: With dead ends: 59 [2020-10-26 19:42:06,155 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:42:06,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:42:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:42:06,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-10-26 19:42:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:42:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-26 19:42:06,187 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 38 [2020-10-26 19:42:06,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:06,187 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-26 19:42:06,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:42:06,187 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-26 19:42:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:42:06,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:06,190 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:06,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:42:06,190 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1563522384, now seen corresponding path program 2 times [2020-10-26 19:42:06,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:06,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484992687] [2020-10-26 19:42:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:06,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:06,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:06,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:07,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:07,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:08,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:09,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:10,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:10,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:42:10,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:42:10,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4080 [2020-10-26 19:42:10,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:10,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:42:10,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:10,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:42:10,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:10,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:10,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:10,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:10,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:10,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:10,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:42:10,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:10,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:10,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:10,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:10,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:10,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:10,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:10,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:10,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:10,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:10,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:42:10,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:10,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:10,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:10,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:10,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:42:10,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484992687] [2020-10-26 19:42:10,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:10,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:42:10,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605076698] [2020-10-26 19:42:10,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:42:10,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:10,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:42:10,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:42:10,486 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 9 states. [2020-10-26 19:42:10,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:10,827 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-10-26 19:42:10,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:42:10,827 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-26 19:42:10,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:10,828 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:42:10,828 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:42:10,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:42:10,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:42:10,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-26 19:42:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:42:10,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-26 19:42:10,848 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 38 [2020-10-26 19:42:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:10,849 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-26 19:42:10,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:42:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-26 19:42:10,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:42:10,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:10,855 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:10,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:42:10,856 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:10,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:10,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2017163884, now seen corresponding path program 3 times [2020-10-26 19:42:10,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:10,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503268868] [2020-10-26 19:42:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:10,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:10,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:11,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:11,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:11,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:12,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:14,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:14,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:42:14,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:42:14,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3599 [2020-10-26 19:42:14,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:14,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:42:14,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:14,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:42:14,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:14,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:14,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:14,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:14,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:14,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:14,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:42:14,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:14,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:14,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:14,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:14,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:14,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:14,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:14,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:14,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:14,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:14,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:14,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:14,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:14,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:14,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:14,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:42:14,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503268868] [2020-10-26 19:42:14,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:14,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:42:14,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777857498] [2020-10-26 19:42:14,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:42:14,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:14,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:42:14,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:42:14,650 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 7 states. [2020-10-26 19:42:14,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:14,785 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-10-26 19:42:14,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:42:14,786 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-26 19:42:14,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:14,787 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:42:14,787 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:42:14,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:42:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:42:14,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-26 19:42:14,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:42:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-26 19:42:14,805 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 38 [2020-10-26 19:42:14,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:14,805 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-26 19:42:14,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:42:14,806 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-26 19:42:14,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:42:14,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:14,807 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:14,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:42:14,807 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:14,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:14,808 INFO L82 PathProgramCache]: Analyzing trace with hash -818549140, now seen corresponding path program 4 times [2020-10-26 19:42:14,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:14,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636790264] [2020-10-26 19:42:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:14,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:14,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:15,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:15,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:42:15,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:42:15,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1024 [2020-10-26 19:42:15,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:15,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:42:15,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:15,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:42:15,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:15,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:15,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:15,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:15,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:15,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:15,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:42:15,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:15,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:15,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:15,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:15,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:15,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:15,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:15,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:15,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:15,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:15,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:15,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:15,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:15,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:15,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:15,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:42:15,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636790264] [2020-10-26 19:42:15,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:15,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:42:15,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452996487] [2020-10-26 19:42:15,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:42:15,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:15,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:42:15,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:42:15,974 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 10 states. [2020-10-26 19:42:16,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:16,322 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-10-26 19:42:16,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:42:16,322 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-26 19:42:16,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:16,323 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:42:16,323 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:42:16,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:42:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:42:16,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2020-10-26 19:42:16,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:42:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-26 19:42:16,338 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 40 [2020-10-26 19:42:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:16,339 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-26 19:42:16,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:42:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-26 19:42:16,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:42:16,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:16,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:16,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:42:16,347 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:16,347 INFO L82 PathProgramCache]: Analyzing trace with hash 451576945, now seen corresponding path program 5 times [2020-10-26 19:42:16,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:16,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569972598] [2020-10-26 19:42:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:16,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:17,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:17,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:17,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:17,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:17,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:18,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:18,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:19,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:19,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:20,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:20,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:21,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:21,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:42:21,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-26 19:42:21,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:42:21,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:21,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:42:21,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:42:21,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:42:21,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:22,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:22,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:22,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:22,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:22,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:22,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:42:22,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:22,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:22,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:22,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:22,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:22,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:22,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:22,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:22,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:22,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:22,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:42:22,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:22,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:42:22,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:22,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:42:22,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:42:22,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569972598] [2020-10-26 19:42:22,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:22,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:42:22,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506636777] [2020-10-26 19:42:22,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:42:22,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:22,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:42:22,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:42:22,042 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 18 states. [2020-10-26 19:42:23,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:23,411 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-10-26 19:42:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:42:23,411 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-26 19:42:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:23,412 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:42:23,412 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:42:23,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:42:23,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:42:23,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2020-10-26 19:42:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:42:23,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-10-26 19:42:23,451 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 43 [2020-10-26 19:42:23,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:23,452 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-10-26 19:42:23,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:42:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-10-26 19:42:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:42:23,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:23,462 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:23,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:42:23,463 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:23,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:23,463 INFO L82 PathProgramCache]: Analyzing trace with hash -828286733, now seen corresponding path program 4 times [2020-10-26 19:42:23,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:23,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510309127] [2020-10-26 19:42:23,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:23,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:23,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:23,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:23,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:23,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:24,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:24,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:24,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:26,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:26,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:26,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:27,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:28,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:28,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:28,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:42:28,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:42:28,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:42:28,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:28,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:42:28,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:28,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:42:28,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:28,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:28,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:28,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:28,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:28,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:28,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:42:28,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:28,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:28,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:28,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:28,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:28,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:28,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:28,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:28,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:28,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:28,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:42:28,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:28,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:28,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:28,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:28,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:42:28,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510309127] [2020-10-26 19:42:28,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:28,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:42:28,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421113530] [2020-10-26 19:42:28,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:42:28,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:28,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:42:28,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:42:28,823 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 17 states. [2020-10-26 19:42:31,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:31,046 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2020-10-26 19:42:31,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:42:31,046 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-26 19:42:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:31,047 INFO L225 Difference]: With dead ends: 95 [2020-10-26 19:42:31,048 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:42:31,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=523, Invalid=2899, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:42:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:42:31,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2020-10-26 19:42:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:42:31,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2020-10-26 19:42:31,072 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 43 [2020-10-26 19:42:31,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:31,072 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2020-10-26 19:42:31,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:42:31,072 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2020-10-26 19:42:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:42:31,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:31,074 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:31,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:42:31,075 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:31,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:31,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1368274927, now seen corresponding path program 6 times [2020-10-26 19:42:31,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:31,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868357681] [2020-10-26 19:42:31,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:31,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:31,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:31,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:32,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:32,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:33,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:33,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:33,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:34,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:34,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:34,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:35,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:35,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:36,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:36,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:42:36,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:42:36,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:42:36,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:42:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:42:36,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:37,398 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-26 19:42:37,584 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-26 19:42:38,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:38,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:38,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:38,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:38,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:38,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:42:38,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:38,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:38,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:38,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:38,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:38,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:38,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:38,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:38,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:38,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:38,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:38,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:38,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:38,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:38,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:38,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:42:38,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868357681] [2020-10-26 19:42:38,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:38,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:42:38,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318454754] [2020-10-26 19:42:38,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:42:38,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:38,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:42:38,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:42:38,831 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand 29 states. [2020-10-26 19:42:40,176 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 37 [2020-10-26 19:42:40,524 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-26 19:42:41,046 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 40 [2020-10-26 19:42:41,272 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 40 [2020-10-26 19:42:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:42,173 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2020-10-26 19:42:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:42:42,174 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 45 [2020-10-26 19:42:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:42,176 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:42:42,176 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 19:42:42,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=259, Invalid=1997, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:42:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 19:42:42,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2020-10-26 19:42:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:42:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-10-26 19:42:42,192 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 45 [2020-10-26 19:42:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:42,199 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-10-26 19:42:42,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:42:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-10-26 19:42:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:42:42,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:42,200 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:42,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:42:42,201 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:42,201 INFO L82 PathProgramCache]: Analyzing trace with hash -220072975, now seen corresponding path program 5 times [2020-10-26 19:42:42,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:42,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374149432] [2020-10-26 19:42:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:42,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:42,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:42,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:42,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:42,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:43,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:43,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:43,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:44,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:45,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:46,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:46,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:47,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:47,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:42:47,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:42:47,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:42:47,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:47,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:42:47,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:47,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:42:47,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:47,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:47,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:47,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:47,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:47,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:47,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:42:47,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:47,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:47,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:47,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:47,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:47,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:47,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:47,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:47,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:47,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:47,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:47,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:47,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:47,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:47,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:47,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:42:47,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374149432] [2020-10-26 19:42:47,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:47,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:42:47,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719853608] [2020-10-26 19:42:47,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:42:47,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:47,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:42:47,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:42:47,726 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 17 states. [2020-10-26 19:42:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:49,107 INFO L93 Difference]: Finished difference Result 139 states and 165 transitions. [2020-10-26 19:42:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:42:49,107 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-26 19:42:49,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:49,109 INFO L225 Difference]: With dead ends: 139 [2020-10-26 19:42:49,109 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:42:49,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:42:49,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:42:49,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 88. [2020-10-26 19:42:49,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:42:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2020-10-26 19:42:49,126 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 45 [2020-10-26 19:42:49,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:49,126 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2020-10-26 19:42:49,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:42:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2020-10-26 19:42:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:42:49,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:49,127 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:49,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:42:49,128 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:49,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:49,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1846739949, now seen corresponding path program 7 times [2020-10-26 19:42:49,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:49,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072972220] [2020-10-26 19:42:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:49,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:49,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:50,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:50,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:42:50,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:42:50,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1501 [2020-10-26 19:42:50,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:50,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:42:50,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:50,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:42:50,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:50,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:50,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:50,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:50,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:50,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:50,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:42:50,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:50,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:50,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:50,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:50,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:50,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:50,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:50,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:50,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:50,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:50,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:50,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:50,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:50,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:50,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:50,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:42:50,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072972220] [2020-10-26 19:42:50,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:50,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:42:50,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575460638] [2020-10-26 19:42:50,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:42:50,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:50,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:42:50,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:42:50,810 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 12 states. [2020-10-26 19:42:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:51,319 INFO L93 Difference]: Finished difference Result 156 states and 179 transitions. [2020-10-26 19:42:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:42:51,319 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-26 19:42:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:51,323 INFO L225 Difference]: With dead ends: 156 [2020-10-26 19:42:51,323 INFO L226 Difference]: Without dead ends: 111 [2020-10-26 19:42:51,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:42:51,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-26 19:42:51,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2020-10-26 19:42:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:42:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2020-10-26 19:42:51,340 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 47 [2020-10-26 19:42:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:51,340 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2020-10-26 19:42:51,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:42:51,341 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2020-10-26 19:42:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:42:51,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:51,341 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:51,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:42:51,342 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:51,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:51,342 INFO L82 PathProgramCache]: Analyzing trace with hash 142162099, now seen corresponding path program 8 times [2020-10-26 19:42:51,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:51,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586308924] [2020-10-26 19:42:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:51,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:51,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:51,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:51,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:52,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:52,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:53,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:53,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:53,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:54,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:55,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:55,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:55,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:56,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:56,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:56,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:56,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:42:56,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:42:56,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:42:56,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:56,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:42:56,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:56,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:42:56,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:56,919 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2020-10-26 19:42:57,094 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2020-10-26 19:42:57,241 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2020-10-26 19:42:57,554 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 44 [2020-10-26 19:42:57,815 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 41 [2020-10-26 19:42:58,217 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2020-10-26 19:42:58,553 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2020-10-26 19:42:58,969 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2020-10-26 19:42:59,207 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-10-26 19:42:59,457 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-26 19:42:59,701 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-26 19:42:59,966 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-26 19:43:00,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:00,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:00,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:00,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:00,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:00,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:43:00,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:00,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:00,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:00,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:00,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:00,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:00,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:00,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:00,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:00,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:00,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:00,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:00,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:00,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:00,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:00,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:43:00,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586308924] [2020-10-26 19:43:00,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:00,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:43:00,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815693719] [2020-10-26 19:43:00,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:43:00,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:00,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:43:00,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=647, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:43:00,808 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand 27 states. [2020-10-26 19:43:01,977 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 44 [2020-10-26 19:43:02,324 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2020-10-26 19:43:02,647 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-26 19:43:02,965 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-26 19:43:03,193 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-26 19:43:03,499 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-26 19:43:03,968 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-26 19:43:04,530 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 102 [2020-10-26 19:43:04,961 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-26 19:43:05,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:05,863 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2020-10-26 19:43:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:43:05,863 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 49 [2020-10-26 19:43:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:05,865 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:43:05,865 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:43:05,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=198, Invalid=2252, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:43:05,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:43:05,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2020-10-26 19:43:05,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:43:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-10-26 19:43:05,881 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 49 [2020-10-26 19:43:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:05,882 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-10-26 19:43:05,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:43:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-10-26 19:43:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:43:05,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:05,883 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:05,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:43:05,883 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:05,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1179539386, now seen corresponding path program 9 times [2020-10-26 19:43:05,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:05,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946897587] [2020-10-26 19:43:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:05,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:06,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:06,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:07,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:07,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:08,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:09,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:09,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:10,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:10,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:10,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:11,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:11,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:43:11,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:43:11,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5228 [2020-10-26 19:43:11,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:11,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:43:11,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:11,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:43:11,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:11,712 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2020-10-26 19:43:11,939 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-10-26 19:43:12,079 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-10-26 19:43:12,518 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-26 19:43:12,694 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-10-26 19:43:12,859 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2020-10-26 19:43:13,034 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-26 19:43:13,424 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-26 19:43:13,681 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-26 19:43:15,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:15,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:15,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:15,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:15,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:15,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:15,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:15,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:15,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:15,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:15,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:15,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:15,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:15,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:15,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:15,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:15,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:15,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:15,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:15,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:15,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:15,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:43:15,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946897587] [2020-10-26 19:43:15,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:15,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:43:15,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235603357] [2020-10-26 19:43:15,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:43:15,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:15,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:43:15,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1051, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:43:15,697 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 34 states. [2020-10-26 19:43:17,045 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-10-26 19:43:17,633 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 56 [2020-10-26 19:43:17,849 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-26 19:43:18,292 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 36 [2020-10-26 19:43:18,760 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 40 [2020-10-26 19:43:19,436 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2020-10-26 19:43:20,046 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 71 [2020-10-26 19:43:20,389 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-26 19:43:20,831 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 19:43:21,209 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-26 19:43:21,819 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-26 19:43:22,064 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-26 19:43:22,632 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 56 [2020-10-26 19:43:22,913 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-26 19:43:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:24,390 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-10-26 19:43:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:43:24,391 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 52 [2020-10-26 19:43:24,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:24,393 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:43:24,393 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:43:24,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=268, Invalid=3154, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:43:24,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:43:24,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2020-10-26 19:43:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:43:24,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2020-10-26 19:43:24,414 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 52 [2020-10-26 19:43:24,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:24,414 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2020-10-26 19:43:24,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:43:24,415 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2020-10-26 19:43:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:43:24,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:24,417 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:24,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:43:24,418 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:24,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:24,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1426484168, now seen corresponding path program 6 times [2020-10-26 19:43:24,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:24,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309140090] [2020-10-26 19:43:24,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:24,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:24,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:24,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:24,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:24,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:24,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:24,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:25,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:25,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:25,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:26,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:26,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:28,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:28,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:29,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:29,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:43:29,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:43:29,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:43:29,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:29,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:43:29,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:29,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:43:29,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:30,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:30,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:30,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:30,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:30,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:30,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:43:30,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:30,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:30,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:30,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:30,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:30,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:30,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:30,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:30,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:30,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:30,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:30,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:30,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:30,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:30,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:30,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 19:43:30,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309140090] [2020-10-26 19:43:30,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:30,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:43:30,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118677360] [2020-10-26 19:43:30,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:43:30,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:30,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:43:30,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:43:30,311 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand 19 states. [2020-10-26 19:43:30,749 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-26 19:43:31,951 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-26 19:43:32,156 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-26 19:43:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:32,372 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2020-10-26 19:43:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:43:32,373 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-10-26 19:43:32,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:32,374 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:43:32,374 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:43:32,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=249, Invalid=1083, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:43:32,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:43:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2020-10-26 19:43:32,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:43:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2020-10-26 19:43:32,394 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 52 [2020-10-26 19:43:32,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:32,394 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2020-10-26 19:43:32,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:43:32,394 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2020-10-26 19:43:32,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:43:32,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:32,395 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:32,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:43:32,396 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:32,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:32,396 INFO L82 PathProgramCache]: Analyzing trace with hash -960684668, now seen corresponding path program 7 times [2020-10-26 19:43:32,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:32,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28940079] [2020-10-26 19:43:32,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:32,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:32,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:32,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:33,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:33,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:33,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:34,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:34,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:34,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:35,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:35,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:35,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:35,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:37,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:37,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:43:37,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:43:37,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:43:37,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:37,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:43:37,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:37,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:43:37,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:37,999 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-10-26 19:43:38,372 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-10-26 19:43:38,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:38,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:38,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:38,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:38,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:38,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:43:38,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:38,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:38,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:38,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:38,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:38,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:38,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:38,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:38,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:38,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:38,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:38,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:38,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 19:43:38,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28940079] [2020-10-26 19:43:38,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:38,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:43:38,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659989273] [2020-10-26 19:43:38,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:43:38,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:38,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:43:38,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:43:38,873 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand 18 states. [2020-10-26 19:43:39,448 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2020-10-26 19:43:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:40,119 INFO L93 Difference]: Finished difference Result 123 states and 145 transitions. [2020-10-26 19:43:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:43:40,120 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-26 19:43:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:40,122 INFO L225 Difference]: With dead ends: 123 [2020-10-26 19:43:40,122 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:43:40,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:43:40,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:43:40,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2020-10-26 19:43:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:43:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2020-10-26 19:43:40,137 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 52 [2020-10-26 19:43:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:40,137 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2020-10-26 19:43:40,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:43:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2020-10-26 19:43:40,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:43:40,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:40,138 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:40,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:43:40,139 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:40,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:40,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1655643354, now seen corresponding path program 10 times [2020-10-26 19:43:40,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:40,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226964184] [2020-10-26 19:43:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:40,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:40,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:40,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:40,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:40,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:41,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:41,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:41,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:41,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:42,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:42,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:42,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:42,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:42,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:42,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:42,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:42,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:42,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:42,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:43,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:43,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:43,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:44,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:45,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:45,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:43:45,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-26 19:43:45,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:43:45,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:45,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:43:45,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:43:45,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:43:45,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:45,689 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-10-26 19:43:45,969 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2020-10-26 19:43:46,223 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2020-10-26 19:43:46,441 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2020-10-26 19:43:47,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:47,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:47,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:47,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:47,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:47,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:43:47,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:47,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:47,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:47,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:47,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:47,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:47,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:47,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:47,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:47,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:43:47,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:47,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:43:47,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:43:47,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226964184] [2020-10-26 19:43:47,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:47,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:43:47,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120823345] [2020-10-26 19:43:47,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:43:47,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:47,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:43:47,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:43:47,243 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand 27 states. [2020-10-26 19:43:48,012 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-26 19:43:48,341 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-26 19:43:48,576 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-26 19:43:49,160 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-26 19:43:49,856 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-26 19:43:50,101 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-26 19:43:50,396 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-26 19:43:51,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:51,087 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2020-10-26 19:43:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:43:51,088 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-10-26 19:43:51,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:51,089 INFO L225 Difference]: With dead ends: 145 [2020-10-26 19:43:51,090 INFO L226 Difference]: Without dead ends: 138 [2020-10-26 19:43:51,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=483, Invalid=2067, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:43:51,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-26 19:43:51,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-10-26 19:43:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:43:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2020-10-26 19:43:51,105 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 52 [2020-10-26 19:43:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:51,105 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2020-10-26 19:43:51,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:43:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2020-10-26 19:43:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:43:51,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:51,106 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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] [2020-10-26 19:43:51,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:43:51,106 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:51,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1304561261, now seen corresponding path program 8 times [2020-10-26 19:43:51,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:51,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471098621] [2020-10-26 19:43:51,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:51,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:51,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:51,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:51,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:51,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:51,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:51,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:54,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:54,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:54,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:56,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:56,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:43:56,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:43:56,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:43:56,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:56,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:43:56,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:56,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:43:56,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:56,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:56,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:56,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:56,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:56,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:56,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:43:56,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:56,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:56,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:56,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:56,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:56,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:56,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:56,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:56,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:56,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:56,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:56,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:56,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:56,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:56,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:56,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-26 19:43:56,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471098621] [2020-10-26 19:43:56,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:56,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:43:56,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904076343] [2020-10-26 19:43:56,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:43:56,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:56,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:43:56,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:43:56,279 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand 11 states. [2020-10-26 19:43:56,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:56,726 INFO L93 Difference]: Finished difference Result 125 states and 144 transitions. [2020-10-26 19:43:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:43:56,727 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-26 19:43:56,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:56,728 INFO L225 Difference]: With dead ends: 125 [2020-10-26 19:43:56,728 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:43:56,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:43:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:43:56,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 98. [2020-10-26 19:43:56,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:43:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2020-10-26 19:43:56,763 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 53 [2020-10-26 19:43:56,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:56,763 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2020-10-26 19:43:56,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:43:56,763 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2020-10-26 19:43:56,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:43:56,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:56,764 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:56,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:43:56,765 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:56,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1528543876, now seen corresponding path program 11 times [2020-10-26 19:43:56,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:56,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005532999] [2020-10-26 19:43:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:56,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:56,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:59,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:59,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:43:59,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:43:59,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2692 [2020-10-26 19:43:59,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:43:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:43:59,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:59,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:59,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:59,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:59,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:59,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:59,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:59,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:59,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:59,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:59,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:59,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:59,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:59,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:59,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:59,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:59,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:59,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:43:59,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:59,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:59,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:59,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:59,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 19:43:59,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005532999] [2020-10-26 19:43:59,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:59,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:43:59,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989002001] [2020-10-26 19:43:59,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:43:59,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:59,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:43:59,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:43:59,676 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand 14 states. [2020-10-26 19:44:00,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:00,339 INFO L93 Difference]: Finished difference Result 172 states and 199 transitions. [2020-10-26 19:44:00,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:44:00,340 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-26 19:44:00,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:00,341 INFO L225 Difference]: With dead ends: 172 [2020-10-26 19:44:00,342 INFO L226 Difference]: Without dead ends: 113 [2020-10-26 19:44:00,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:44:00,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-26 19:44:00,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 85. [2020-10-26 19:44:00,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:44:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2020-10-26 19:44:00,361 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 54 [2020-10-26 19:44:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:00,362 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2020-10-26 19:44:00,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:44:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2020-10-26 19:44:00,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:44:00,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:00,363 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:00,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:44:00,363 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:00,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:00,363 INFO L82 PathProgramCache]: Analyzing trace with hash -740835996, now seen corresponding path program 12 times [2020-10-26 19:44:00,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:00,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977605938] [2020-10-26 19:44:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:00,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:00,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:01,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:02,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:02,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:03,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:03,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:04,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:04,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:05,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:05,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:05,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:44:05,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:44:05,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:44:05,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:05,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:44:05,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:44:05,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:44:05,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:05,911 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-10-26 19:44:06,169 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-26 19:44:06,547 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-26 19:44:06,742 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-26 19:44:07,056 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-26 19:44:07,310 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-26 19:44:07,566 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-26 19:44:07,816 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-26 19:44:08,059 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2020-10-26 19:44:08,268 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-26 19:44:08,478 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-10-26 19:44:08,665 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-10-26 19:44:09,676 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-26 19:44:10,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:10,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:10,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:10,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:10,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:10,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:10,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:10,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:10,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:10,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:10,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:10,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:44:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:10,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:10,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:10,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:10,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:10,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:44:10,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:10,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:10,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:10,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:10,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:10,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977605938] [2020-10-26 19:44:10,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:10,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:44:10,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60119497] [2020-10-26 19:44:10,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:44:10,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:10,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:44:10,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:44:10,491 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 33 states. [2020-10-26 19:44:10,973 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-26 19:44:11,222 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-26 19:44:11,473 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-26 19:44:11,891 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-26 19:44:12,136 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-10-26 19:44:12,558 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 37 [2020-10-26 19:44:12,891 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-26 19:44:13,364 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 51 [2020-10-26 19:44:13,790 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-10-26 19:44:14,281 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-26 19:44:14,631 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-26 19:44:14,991 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-26 19:44:15,280 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-26 19:44:15,602 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-26 19:44:15,959 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-26 19:44:16,225 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-26 19:44:16,721 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-26 19:44:16,941 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-26 19:44:17,323 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-26 19:44:17,998 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-26 19:44:18,288 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-26 19:44:18,734 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-26 19:44:19,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:19,077 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2020-10-26 19:44:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:44:19,080 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 54 [2020-10-26 19:44:19,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:19,080 INFO L225 Difference]: With dead ends: 105 [2020-10-26 19:44:19,080 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:44:19,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=315, Invalid=3345, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 19:44:19,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:44:19,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2020-10-26 19:44:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:44:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-10-26 19:44:19,100 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 54 [2020-10-26 19:44:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:19,100 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-10-26 19:44:19,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:44:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-10-26 19:44:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:44:19,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:19,101 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:19,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:44:19,101 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:19,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:19,102 INFO L82 PathProgramCache]: Analyzing trace with hash -521981278, now seen corresponding path program 9 times [2020-10-26 19:44:19,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:19,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931091918] [2020-10-26 19:44:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:19,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:19,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:19,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:19,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:19,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:20,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:20,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:21,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:22,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:22,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:23,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:24,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:24,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:44:24,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:44:24,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:44:24,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:24,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:44:24,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:44:24,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:44:24,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:24,475 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2020-10-26 19:44:24,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:24,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:24,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:24,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:24,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:24,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:24,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:24,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:24,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:24,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:24,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:24,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:44:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:24,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:24,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:24,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:24,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:24,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:44:24,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:24,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:24,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:24,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:24,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 19:44:24,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931091918] [2020-10-26 19:44:24,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:24,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:44:24,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699772432] [2020-10-26 19:44:24,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:44:24,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:24,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:44:24,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:44:24,924 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 20 states. [2020-10-26 19:44:26,212 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-26 19:44:26,681 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-10-26 19:44:27,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:27,029 INFO L93 Difference]: Finished difference Result 119 states and 137 transitions. [2020-10-26 19:44:27,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:44:27,030 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-10-26 19:44:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:27,031 INFO L225 Difference]: With dead ends: 119 [2020-10-26 19:44:27,031 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:44:27,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=406, Invalid=1574, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:44:27,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:44:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2020-10-26 19:44:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:44:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2020-10-26 19:44:27,063 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 54 [2020-10-26 19:44:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:27,063 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2020-10-26 19:44:27,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:44:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2020-10-26 19:44:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:44:27,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:27,064 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:27,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:44:27,064 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:27,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1988648239, now seen corresponding path program 13 times [2020-10-26 19:44:27,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:27,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011507107] [2020-10-26 19:44:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:27,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:27,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:27,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:27,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:27,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:27,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:28,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:28,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:28,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:28,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:28,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:29,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:29,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:30,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:30,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:30,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:31,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:31,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:31,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:32,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:32,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:44:32,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-26 19:44:32,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:44:32,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:32,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:44:32,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:44:32,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-26 19:44:32,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:32,467 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-10-26 19:44:32,749 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-26 19:44:32,884 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-10-26 19:44:33,073 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-26 19:44:33,323 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-26 19:44:33,620 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-26 19:44:34,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:34,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:34,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:34,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:34,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:34,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:34,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:34,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:34,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:34,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:34,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:34,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:44:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:34,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:34,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:34,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:34,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:34,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:34,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:34,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:44:34,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:34,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:44:34,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 60 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:44:34,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011507107] [2020-10-26 19:44:34,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:34,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:44:34,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884966408] [2020-10-26 19:44:34,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:44:34,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:34,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:44:34,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:44:34,397 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 27 states. [2020-10-26 19:44:35,166 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-26 19:44:35,518 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-26 19:44:35,685 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-26 19:44:35,893 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-26 19:44:36,080 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-10-26 19:44:36,291 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2020-10-26 19:44:36,575 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-26 19:44:36,829 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-26 19:44:37,083 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-26 19:44:37,394 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2020-10-26 19:44:37,707 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2020-10-26 19:44:37,992 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-26 19:44:38,318 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-10-26 19:44:38,633 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2020-10-26 19:44:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:39,083 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2020-10-26 19:44:39,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:44:39,084 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 57 [2020-10-26 19:44:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:39,085 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:44:39,085 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:44:39,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=452, Invalid=2304, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:44:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:44:39,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2020-10-26 19:44:39,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:44:39,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-10-26 19:44:39,100 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 57 [2020-10-26 19:44:39,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:39,101 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-10-26 19:44:39,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:44:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-10-26 19:44:39,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:44:39,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:39,102 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:39,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:44:39,102 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:39,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:39,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1364016719, now seen corresponding path program 14 times [2020-10-26 19:44:39,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:39,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580258392] [2020-10-26 19:44:39,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:39,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:39,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:40,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:40,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:41,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:42,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:44,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:44,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:44:44,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:44:44,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:44:44,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:44,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:44:44,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:44:44,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-26 19:44:44,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:45,211 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-10-26 19:44:45,505 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-26 19:44:45,904 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-26 19:44:46,210 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2020-10-26 19:44:46,511 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-26 19:44:46,857 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-26 19:44:47,141 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-26 19:44:47,357 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-26 19:44:47,574 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-26 19:44:47,836 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-26 19:44:48,034 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-26 19:44:50,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:50,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:50,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:50,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:50,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:50,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:50,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:50,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:50,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:50,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:50,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:50,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:44:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:50,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:50,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:50,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:50,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:50,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:44:50,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:50,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:50,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:50,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:50,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:50,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580258392] [2020-10-26 19:44:50,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:50,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:44:50,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439177267] [2020-10-26 19:44:50,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:44:50,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:50,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:44:50,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:44:50,731 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 37 states. [2020-10-26 19:44:52,461 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2020-10-26 19:44:53,505 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-26 19:44:55,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:55,423 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2020-10-26 19:44:55,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:44:55,424 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 59 [2020-10-26 19:44:55,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:55,425 INFO L225 Difference]: With dead ends: 89 [2020-10-26 19:44:55,425 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:44:55,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=117, Invalid=1863, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:44:55,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:44:55,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2020-10-26 19:44:55,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:44:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-10-26 19:44:55,443 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 59 [2020-10-26 19:44:55,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:55,444 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-10-26 19:44:55,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:44:55,444 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-10-26 19:44:55,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:44:55,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:55,444 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:55,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:44:55,445 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:55,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:55,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1007722543, now seen corresponding path program 10 times [2020-10-26 19:44:55,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:55,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178468006] [2020-10-26 19:44:55,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:55,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:55,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:55,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:56,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:57,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:00,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:00,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:00,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:45:00,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:45:00,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:45:00,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:00,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:45:00,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:45:00,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:45:00,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:00,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:00,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:00,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:00,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:00,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:00,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:45:00,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:00,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:00,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:00,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:00,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:00,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:45:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:00,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:00,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:00,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:00,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:00,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:00,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:00,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:00,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:00,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:00,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-26 19:45:00,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178468006] [2020-10-26 19:45:00,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:00,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:45:00,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762551436] [2020-10-26 19:45:00,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:45:00,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:00,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:45:00,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:45:00,745 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 11 states. [2020-10-26 19:45:01,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:01,417 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2020-10-26 19:45:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:45:01,419 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-26 19:45:01,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:01,420 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:45:01,420 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:45:01,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:45:01,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:45:01,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2020-10-26 19:45:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:45:01,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-10-26 19:45:01,440 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 59 [2020-10-26 19:45:01,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:01,441 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-10-26 19:45:01,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:45:01,441 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-10-26 19:45:01,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:45:01,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:01,441 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:01,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:45:01,442 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:01,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:01,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2049569357, now seen corresponding path program 15 times [2020-10-26 19:45:01,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:01,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935682233] [2020-10-26 19:45:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:01,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:01,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:06,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:06,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:45:06,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:06,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4712 [2020-10-26 19:45:06,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:06,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:45:06,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:45:06,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:45:06,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:06,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:06,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:06,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:06,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:06,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:06,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:45:06,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:06,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:06,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:06,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:06,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:06,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:45:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:06,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:06,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:06,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:06,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:06,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:45:06,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:06,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:06,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:06,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:06,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:45:06,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935682233] [2020-10-26 19:45:06,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:06,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:45:06,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840178574] [2020-10-26 19:45:06,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:45:06,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:06,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:45:06,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:45:06,456 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 16 states. [2020-10-26 19:45:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:07,237 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2020-10-26 19:45:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:45:07,238 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-26 19:45:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:07,239 INFO L225 Difference]: With dead ends: 156 [2020-10-26 19:45:07,239 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:45:07,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:45:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:45:07,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2020-10-26 19:45:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:45:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-26 19:45:07,254 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 61 [2020-10-26 19:45:07,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:07,254 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-26 19:45:07,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:45:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-26 19:45:07,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:45:07,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:07,254 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:07,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:45:07,255 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:07,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:07,255 INFO L82 PathProgramCache]: Analyzing trace with hash 519142560, now seen corresponding path program 16 times [2020-10-26 19:45:07,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:07,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753544274] [2020-10-26 19:45:07,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:07,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:07,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:07,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:07,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:07,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:07,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:08,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:08,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:08,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:09,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:09,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:09,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:10,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:10,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:10,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:11,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:11,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:11,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:12,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:12,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:12,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:12,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:45:12,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-26 19:45:12,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5101 [2020-10-26 19:45:12,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:12,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:45:12,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:45:12,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:45:12,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:13,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:13,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:13,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:13,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:13,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:13,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:13,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:13,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:13,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:13,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:13,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:13,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:45:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:13,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:13,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:13,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:13,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:13,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:13,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:13,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:13,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:13,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:13,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:45:13,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753544274] [2020-10-26 19:45:13,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:13,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:45:13,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468398862] [2020-10-26 19:45:13,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:45:13,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:13,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:45:13,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:45:13,753 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 28 states.