/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-tiling/revcpyswp2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:56:06,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:56:06,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:56:06,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:56:06,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:56:06,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:56:06,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:56:06,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:56:06,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:56:06,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:56:06,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:56:06,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:56:06,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:56:06,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:56:06,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:56:06,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:56:06,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:56:06,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:56:06,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:56:06,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:56:06,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:56:06,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:56:06,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:56:06,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:56:06,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:56:06,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:56:06,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:56:06,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:56:06,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:56:06,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:56:06,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:56:06,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:56:06,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:56:06,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:56:06,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:56:06,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:56:06,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:56:06,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:56:06,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:56:06,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:56:06,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:56:06,968 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 19:56:06,996 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:56:06,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:56:06,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:56:06,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:56:06,999 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:56:07,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:56:07,000 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:56:07,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:56:07,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:56:07,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:56:07,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:56:07,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:56:07,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:56:07,002 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:56:07,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:56:07,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:56:07,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:56:07,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:56:07,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:56:07,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:56:07,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:56:07,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:56:07,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:56:07,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:56:07,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:56:07,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:56:07,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:56:07,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:56:07,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:56:07,006 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:56:07,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:56:07,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:56:07,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:56:07,451 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:56:07,452 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:56:07,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/revcpyswp2.c [2020-10-26 19:56:07,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/764532e93/418e2e4bebea4c83863180c58355c1e7/FLAG199cc4319 [2020-10-26 19:56:08,190 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:56:08,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/revcpyswp2.c [2020-10-26 19:56:08,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/764532e93/418e2e4bebea4c83863180c58355c1e7/FLAG199cc4319 [2020-10-26 19:56:08,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/764532e93/418e2e4bebea4c83863180c58355c1e7 [2020-10-26 19:56:08,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:56:08,533 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:56:08,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:56:08,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:56:08,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:56:08,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:56:08" (1/1) ... [2020-10-26 19:56:08,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb2d0c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:56:08, skipping insertion in model container [2020-10-26 19:56:08,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:56:08" (1/1) ... [2020-10-26 19:56:08,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:56:08,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:56:08,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:56:08,771 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:56:08,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:56:08,818 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:56:08,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:56:08 WrapperNode [2020-10-26 19:56:08,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:56:08,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:56:08,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:56:08,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:56:08,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:56:08" (1/1) ... [2020-10-26 19:56:08,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:56:08" (1/1) ... [2020-10-26 19:56:08,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:56:08" (1/1) ... [2020-10-26 19:56:08,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:56:08" (1/1) ... [2020-10-26 19:56:08,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:56:08" (1/1) ... [2020-10-26 19:56:08,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:56:08" (1/1) ... [2020-10-26 19:56:08,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:56:08" (1/1) ... [2020-10-26 19:56:08,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:56:08,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:56:08,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:56:08,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:56:08,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:56:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:56:08,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:56:08,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:56:08,964 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:56:08,964 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:56:08,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:56:08,964 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:56:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:56:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:56:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:56:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:56:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:56:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:56:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:56:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:56:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:56:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:56:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:56:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:56:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:56:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:56:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:56:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:56:09,400 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:56:09,400 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-26 19:56:09,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:56:09 BoogieIcfgContainer [2020-10-26 19:56:09,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:56:09,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:56:09,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:56:09,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:56:09,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:56:08" (1/3) ... [2020-10-26 19:56:09,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d40fb5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:56:09, skipping insertion in model container [2020-10-26 19:56:09,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:56:08" (2/3) ... [2020-10-26 19:56:09,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d40fb5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:56:09, skipping insertion in model container [2020-10-26 19:56:09,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:56:09" (3/3) ... [2020-10-26 19:56:09,411 INFO L111 eAbstractionObserver]: Analyzing ICFG revcpyswp2.c [2020-10-26 19:56:09,424 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:56:09,429 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:56:09,444 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:56:09,473 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:56:09,473 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:56:09,473 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:56:09,474 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:56:09,474 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:56:09,474 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:56:09,474 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:56:09,474 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:56:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-26 19:56:09,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:56:09,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:56:09,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:56:09,501 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:56:09,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:56:09,509 INFO L82 PathProgramCache]: Analyzing trace with hash 880128442, now seen corresponding path program 1 times [2020-10-26 19:56:09,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:56:09,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73584845] [2020-10-26 19:56:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:56:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:09,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:09,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:09,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:09,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:10,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:10,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:10,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:10,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:56:10,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:56:10,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1240 [2020-10-26 19:56:10,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:10,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:56:10,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:56:10,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:56:10,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:56:11,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:56:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:11,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:11,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:11,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:56:11,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:56:11,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 19:56:11,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:11,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:56:11,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:56:11,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:56:11,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:56:11,150 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 19:56:11,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73584845] [2020-10-26 19:56:11,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:56:11,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:56:11,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818178322] [2020-10-26 19:56:11,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:56:11,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:56:11,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:56:11,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:56:11,193 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-10-26 19:56:11,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:56:11,580 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2020-10-26 19:56:11,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:56:11,582 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-26 19:56:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:56:11,591 INFO L225 Difference]: With dead ends: 81 [2020-10-26 19:56:11,592 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:56:11,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:56:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:56:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-10-26 19:56:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:56:11,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-26 19:56:11,647 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2020-10-26 19:56:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:56:11,648 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-26 19:56:11,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:56:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-26 19:56:11,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:56:11,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:56:11,649 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] [2020-10-26 19:56:11,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:56:11,650 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:56:11,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:56:11,651 INFO L82 PathProgramCache]: Analyzing trace with hash 2053054216, now seen corresponding path program 1 times [2020-10-26 19:56:11,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:56:11,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555495635] [2020-10-26 19:56:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:56:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:11,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:11,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:11,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:11,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:12,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:13,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:16,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:16,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:56:16,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:56:16,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:56:16,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:16,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:56:16,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:56:16,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:56:16,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:56:17,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:56:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:17,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:17,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:17,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:56:17,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:56:17,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:56:17,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:17,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:56:17,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:56:17,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:56:17,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:56:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:56:17,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555495635] [2020-10-26 19:56:17,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:56:17,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:56:17,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561830533] [2020-10-26 19:56:17,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:56:17,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:56:17,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:56:17,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:56:17,307 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 14 states. [2020-10-26 19:56:18,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:56:18,011 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-10-26 19:56:18,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:56:18,012 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-26 19:56:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:56:18,014 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:56:18,014 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:56:18,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:56:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:56:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2020-10-26 19:56:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:56:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-26 19:56:18,031 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 29 [2020-10-26 19:56:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:56:18,032 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-26 19:56:18,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:56:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-26 19:56:18,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:56:18,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:56:18,033 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] [2020-10-26 19:56:18,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:56:18,034 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:56:18,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:56:18,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1259434806, now seen corresponding path program 2 times [2020-10-26 19:56:18,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:56:18,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269452174] [2020-10-26 19:56:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:56:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:18,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:18,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:18,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:18,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:19,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:19,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:19,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:23,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:23,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:56:23,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:56:23,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:56:23,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:23,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:56:23,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:56:23,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:56:23,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:56:23,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:56:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:23,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:23,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:23,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:56:23,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:56:23,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:56:23,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:23,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:56:23,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:56:23,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:56:23,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:56:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:56:23,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269452174] [2020-10-26 19:56:23,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:56:23,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:56:23,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867945307] [2020-10-26 19:56:23,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:56:23,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:56:23,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:56:23,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:56:23,170 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 6 states. [2020-10-26 19:56:23,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:56:23,433 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-26 19:56:23,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:56:23,434 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-26 19:56:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:56:23,436 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:56:23,436 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 19:56:23,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:56:23,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 19:56:23,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2020-10-26 19:56:23,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:56:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-26 19:56:23,456 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 31 [2020-10-26 19:56:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:56:23,458 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-26 19:56:23,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:56:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-26 19:56:23,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:56:23,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:56:23,461 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:56:23,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:56:23,462 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:56:23,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:56:23,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1775554160, now seen corresponding path program 3 times [2020-10-26 19:56:23,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:56:23,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762998306] [2020-10-26 19:56:23,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:56:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:23,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:23,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:24,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:28,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:28,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:28,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:28,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:56:28,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:56:28,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5287 [2020-10-26 19:56:28,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:28,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:56:28,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:56:28,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:56:28,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:56:29,839 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-26 19:56:30,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:56:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:30,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:30,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:30,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:56:30,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:56:30,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:56:30,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:30,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:56:30,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:56:30,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:56:30,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:56:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:56:30,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762998306] [2020-10-26 19:56:30,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:56:30,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:56:30,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317081666] [2020-10-26 19:56:30,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:56:30,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:56:30,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:56:30,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:56:30,668 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 22 states. [2020-10-26 19:56:31,538 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-26 19:56:32,008 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2020-10-26 19:56:32,296 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-26 19:56:32,910 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-26 19:56:34,141 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-26 19:56:34,343 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-26 19:56:34,665 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-26 19:56:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:56:35,967 INFO L93 Difference]: Finished difference Result 162 states and 192 transitions. [2020-10-26 19:56:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:56:35,971 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2020-10-26 19:56:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:56:35,973 INFO L225 Difference]: With dead ends: 162 [2020-10-26 19:56:35,973 INFO L226 Difference]: Without dead ends: 159 [2020-10-26 19:56:35,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=499, Invalid=1951, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:56:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-26 19:56:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 91. [2020-10-26 19:56:36,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:56:36,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2020-10-26 19:56:36,002 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 37 [2020-10-26 19:56:36,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:56:36,002 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2020-10-26 19:56:36,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:56:36,003 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2020-10-26 19:56:36,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:56:36,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:56:36,005 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:56:36,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:56:36,005 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:56:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:56:36,005 INFO L82 PathProgramCache]: Analyzing trace with hash 126047378, now seen corresponding path program 4 times [2020-10-26 19:56:36,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:56:36,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205802533] [2020-10-26 19:56:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:56:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:36,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:36,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:36,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:37,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:38,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:39,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:40,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:40,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:41,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:41,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:56:41,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:56:41,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5243 [2020-10-26 19:56:41,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:56:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:56:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:56:41,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:56:42,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:56:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:42,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:42,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:42,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:56:42,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:56:42,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:56:42,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:42,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:56:42,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:56:42,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:56:42,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:56:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 19:56:42,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205802533] [2020-10-26 19:56:42,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:56:42,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:56:42,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096174961] [2020-10-26 19:56:42,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:56:42,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:56:42,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:56:42,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:56:42,261 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 17 states. [2020-10-26 19:56:43,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:56:43,178 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2020-10-26 19:56:43,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:56:43,179 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-26 19:56:43,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:56:43,184 INFO L225 Difference]: With dead ends: 141 [2020-10-26 19:56:43,184 INFO L226 Difference]: Without dead ends: 138 [2020-10-26 19:56:43,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:56:43,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-26 19:56:43,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 97. [2020-10-26 19:56:43,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:56:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2020-10-26 19:56:43,211 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 39 [2020-10-26 19:56:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:56:43,211 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2020-10-26 19:56:43,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:56:43,211 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2020-10-26 19:56:43,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:56:43,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:56:43,213 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:56:43,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:56:43,214 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:56:43,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:56:43,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2077270036, now seen corresponding path program 5 times [2020-10-26 19:56:43,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:56:43,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626398923] [2020-10-26 19:56:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:56:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:43,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:43,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:43,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:43,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:43,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:45,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:48,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:48,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:56:48,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:56:48,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:56:48,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:48,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:56:48,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:56:48,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:56:48,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:56:48,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:56:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:48,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:48,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:48,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:56:48,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:56:48,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:56:48,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:48,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:56:48,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:56:48,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:56:48,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:56:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 19:56:48,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626398923] [2020-10-26 19:56:48,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:56:48,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:56:48,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687407010] [2020-10-26 19:56:48,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:56:48,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:56:48,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:56:48,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:56:48,378 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand 10 states. [2020-10-26 19:56:48,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:56:48,893 INFO L93 Difference]: Finished difference Result 181 states and 209 transitions. [2020-10-26 19:56:48,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:56:48,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-26 19:56:48,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:56:48,896 INFO L225 Difference]: With dead ends: 181 [2020-10-26 19:56:48,896 INFO L226 Difference]: Without dead ends: 117 [2020-10-26 19:56:48,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:56:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-26 19:56:48,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-26 19:56:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:56:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-10-26 19:56:48,942 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 41 [2020-10-26 19:56:48,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:56:48,943 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-10-26 19:56:48,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:56:48,943 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-10-26 19:56:48,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:56:48,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:56:48,948 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-26 19:56:48,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:56:48,949 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:56:48,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:56:48,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1466100182, now seen corresponding path program 6 times [2020-10-26 19:56:48,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:56:48,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415072232] [2020-10-26 19:56:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:56:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:48,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:49,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:49,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:53,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:53,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:56:53,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:56:53,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:56:53,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:53,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:56:53,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:56:53,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:56:53,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:56:54,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:56:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:54,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:54,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:54,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:56:54,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:56:54,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:56:54,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:54,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:56:54,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:56:54,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:56:54,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:56:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:56:54,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415072232] [2020-10-26 19:56:54,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:56:54,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:56:54,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416170848] [2020-10-26 19:56:54,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:56:54,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:56:54,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:56:54,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:56:54,108 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 10 states. [2020-10-26 19:56:54,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:56:54,807 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2020-10-26 19:56:54,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:56:54,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-26 19:56:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:56:54,811 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:56:54,811 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:56:54,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:56:54,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:56:54,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2020-10-26 19:56:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:56:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2020-10-26 19:56:54,848 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 43 [2020-10-26 19:56:54,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:56:54,849 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2020-10-26 19:56:54,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:56:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2020-10-26 19:56:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:56:54,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:56:54,856 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:56:54,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:56:54,856 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:56:54,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:56:54,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1971639481, now seen corresponding path program 1 times [2020-10-26 19:56:54,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:56:54,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855655241] [2020-10-26 19:56:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:56:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:54,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:55,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:55,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:55,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:56,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:57,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:57,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:59,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:59,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:59,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:56:59,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:56:59,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:56:59,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:59,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:56:59,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:56:59,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:56:59,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:01,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:57:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:01,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:01,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:01,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:57:01,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:57:01,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:57:01,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:01,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:57:01,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:57:01,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:57:01,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:01,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-26 19:57:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:01,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:01,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:01,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:57:01,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:57:01,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:57:01,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:01,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:57:01,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:57:01,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:57:01,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:57:01,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855655241] [2020-10-26 19:57:01,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:57:01,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:57:01,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848465625] [2020-10-26 19:57:01,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:57:01,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:57:01,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:57:01,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:57:01,299 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 21 states. [2020-10-26 19:57:02,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:57:02,365 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2020-10-26 19:57:02,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:57:02,366 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2020-10-26 19:57:02,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:57:02,367 INFO L225 Difference]: With dead ends: 93 [2020-10-26 19:57:02,367 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:57:02,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:57:02,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:57:02,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2020-10-26 19:57:02,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:57:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-26 19:57:02,378 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 45 [2020-10-26 19:57:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:57:02,378 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-26 19:57:02,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:57:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-26 19:57:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:57:02,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:57:02,379 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:57:02,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:57:02,379 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:57:02,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:57:02,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1613421592, now seen corresponding path program 7 times [2020-10-26 19:57:02,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:57:02,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777809182] [2020-10-26 19:57:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:57:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:02,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:02,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:04,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:05,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:07,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:07,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:07,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:57:07,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:57:07,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 19:57:07,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:07,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:57:07,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:57:07,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:57:07,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:08,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:57:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:08,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:08,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:08,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:57:08,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:57:08,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:57:08,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:08,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:57:08,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:57:08,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:57:08,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:57:08,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777809182] [2020-10-26 19:57:08,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:57:08,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:57:08,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722600625] [2020-10-26 19:57:08,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:57:08,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:57:08,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:57:08,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:57:08,470 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 18 states. [2020-10-26 19:57:09,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:57:09,175 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-26 19:57:09,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:57:09,175 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-26 19:57:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:57:09,177 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:57:09,177 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:57:09,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:57:09,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:57:09,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2020-10-26 19:57:09,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:57:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-26 19:57:09,190 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 45 [2020-10-26 19:57:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:57:09,190 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-26 19:57:09,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:57:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-26 19:57:09,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:57:09,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:57:09,191 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:57:09,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:57:09,192 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:57:09,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:57:09,193 INFO L82 PathProgramCache]: Analyzing trace with hash 25922970, now seen corresponding path program 8 times [2020-10-26 19:57:09,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:57:09,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286854539] [2020-10-26 19:57:09,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:57:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:09,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:09,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:09,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:14,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:14,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:57:14,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:57:14,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-26 19:57:14,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:14,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:57:14,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:57:14,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:57:14,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:14,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:57:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:14,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:14,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:14,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:57:14,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:57:14,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:57:14,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:14,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:57:14,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:57:14,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:57:14,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:57:14,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286854539] [2020-10-26 19:57:14,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:57:14,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:57:14,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896721019] [2020-10-26 19:57:14,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:57:14,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:57:14,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:57:14,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:57:14,411 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 12 states. [2020-10-26 19:57:15,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:57:15,060 INFO L93 Difference]: Finished difference Result 177 states and 199 transitions. [2020-10-26 19:57:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:57:15,061 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-26 19:57:15,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:57:15,063 INFO L225 Difference]: With dead ends: 177 [2020-10-26 19:57:15,063 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:57:15,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:57:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:57:15,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2020-10-26 19:57:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-26 19:57:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2020-10-26 19:57:15,085 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 47 [2020-10-26 19:57:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:57:15,085 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2020-10-26 19:57:15,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:57:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2020-10-26 19:57:15,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:57:15,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:57:15,087 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2020-10-26 19:57:15,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:57:15,087 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:57:15,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:57:15,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1991061086, now seen corresponding path program 9 times [2020-10-26 19:57:15,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:57:15,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235049020] [2020-10-26 19:57:15,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:57:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:15,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:15,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:15,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:20,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:20,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:57:20,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:57:20,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:57:20,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:57:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:57:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:57:20,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:20,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:57:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:20,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:20,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:20,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:57:20,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:57:20,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:57:20,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:20,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:57:20,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:57:20,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:57:20,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-26 19:57:20,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235049020] [2020-10-26 19:57:20,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:57:20,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:57:20,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806811153] [2020-10-26 19:57:20,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:57:20,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:57:20,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:57:20,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:57:20,266 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand 12 states. [2020-10-26 19:57:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:57:21,134 INFO L93 Difference]: Finished difference Result 158 states and 170 transitions. [2020-10-26 19:57:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:57:21,135 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-26 19:57:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:57:21,136 INFO L225 Difference]: With dead ends: 158 [2020-10-26 19:57:21,136 INFO L226 Difference]: Without dead ends: 117 [2020-10-26 19:57:21,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:57:21,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-26 19:57:21,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2020-10-26 19:57:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:57:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2020-10-26 19:57:21,153 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 51 [2020-10-26 19:57:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:57:21,153 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2020-10-26 19:57:21,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:57:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2020-10-26 19:57:21,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:57:21,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:57:21,155 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-26 19:57:21,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:57:21,155 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:57:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:57:21,156 INFO L82 PathProgramCache]: Analyzing trace with hash 110458689, now seen corresponding path program 2 times [2020-10-26 19:57:21,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:57:21,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371185842] [2020-10-26 19:57:21,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:57:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:21,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:21,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:21,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:23,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:23,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:25,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:26,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:26,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:57:26,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:57:26,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:57:26,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:26,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:57:26,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:57:26,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 19:57:26,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:26,695 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-26 19:57:26,825 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2020-10-26 19:57:26,959 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2020-10-26 19:57:27,212 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-10-26 19:57:27,389 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-26 19:57:27,532 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 36 [2020-10-26 19:57:27,676 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-10-26 19:57:27,841 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2020-10-26 19:57:28,058 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2020-10-26 19:57:28,268 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-26 19:57:28,425 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-26 19:57:28,623 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-26 19:57:29,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:57:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:29,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:29,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:29,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:57:29,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:57:29,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:57:29,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:29,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:57:29,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:57:29,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:57:29,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:29,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:57:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:29,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:29,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:29,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:57:29,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:57:29,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:57:29,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:29,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:57:29,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:57:29,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:57:29,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:57:29,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371185842] [2020-10-26 19:57:29,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:57:29,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:57:29,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427613334] [2020-10-26 19:57:29,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:57:29,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:57:29,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:57:29,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:57:29,164 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 28 states. [2020-10-26 19:57:29,456 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2020-10-26 19:57:29,975 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 51 [2020-10-26 19:57:30,195 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 65 [2020-10-26 19:57:30,425 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-26 19:57:30,662 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-26 19:57:30,881 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-26 19:57:31,225 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-10-26 19:57:31,404 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 44 [2020-10-26 19:57:31,591 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-26 19:57:31,839 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-26 19:57:32,338 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-26 19:57:32,595 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-26 19:57:32,828 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-26 19:57:33,405 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-26 19:57:33,607 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-26 19:57:34,152 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-26 19:57:34,388 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-26 19:57:34,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:57:34,411 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-10-26 19:57:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:57:34,412 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 53 [2020-10-26 19:57:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:57:34,414 INFO L225 Difference]: With dead ends: 109 [2020-10-26 19:57:34,414 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:57:34,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=481, Invalid=2489, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:57:34,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:57:34,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-26 19:57:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:57:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2020-10-26 19:57:34,432 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 53 [2020-10-26 19:57:34,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:57:34,432 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2020-10-26 19:57:34,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:57:34,433 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2020-10-26 19:57:34,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:57:34,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:57:34,433 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:57:34,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:57:34,434 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:57:34,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:57:34,434 INFO L82 PathProgramCache]: Analyzing trace with hash -705290592, now seen corresponding path program 10 times [2020-10-26 19:57:34,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:57:34,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924438666] [2020-10-26 19:57:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:57:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:34,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:35,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:37,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:39,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:39,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:39,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:57:39,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:57:39,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5297 [2020-10-26 19:57:39,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:39,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:57:39,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:57:39,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-26 19:57:39,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:40,039 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2020-10-26 19:57:40,368 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-26 19:57:40,614 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-26 19:57:40,907 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-26 19:57:41,615 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-26 19:57:42,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:57:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:42,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:42,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:42,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:57:42,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:57:42,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:57:42,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:42,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:57:42,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:57:42,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:57:42,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-26 19:57:42,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924438666] [2020-10-26 19:57:42,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:57:42,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:57:42,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178865977] [2020-10-26 19:57:42,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:57:42,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:57:42,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:57:42,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:57:42,305 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 26 states. [2020-10-26 19:57:42,701 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-26 19:57:42,989 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-26 19:57:43,149 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-26 19:57:43,416 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-26 19:57:43,635 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-26 19:57:43,830 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-26 19:57:44,039 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-26 19:57:44,349 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-26 19:57:44,621 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-26 19:57:45,190 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-26 19:57:45,404 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-10-26 19:57:45,592 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-26 19:57:45,776 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2020-10-26 19:57:46,052 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-26 19:57:46,312 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-26 19:57:46,507 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-26 19:57:46,837 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-26 19:57:47,114 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-26 19:57:47,659 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-26 19:57:48,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:57:48,024 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2020-10-26 19:57:48,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:57:48,025 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 53 [2020-10-26 19:57:48,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:57:48,028 INFO L225 Difference]: With dead ends: 145 [2020-10-26 19:57:48,028 INFO L226 Difference]: Without dead ends: 142 [2020-10-26 19:57:48,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=426, Invalid=2436, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:57:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-26 19:57:48,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 122. [2020-10-26 19:57:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:57:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2020-10-26 19:57:48,051 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 53 [2020-10-26 19:57:48,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:57:48,051 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2020-10-26 19:57:48,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:57:48,051 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2020-10-26 19:57:48,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:57:48,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:57:48,052 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:57:48,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:57:48,053 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:57:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:57:48,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1348641246, now seen corresponding path program 11 times [2020-10-26 19:57:48,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:57:48,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352040258] [2020-10-26 19:57:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:57:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:48,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:48,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:48,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:53,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:53,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:57:53,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:57:53,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:57:53,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:53,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:57:53,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:57:53,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:57:53,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:53,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:57:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:53,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:53,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:53,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:57:53,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:57:53,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:57:53,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:53,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:57:53,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:57:53,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:57:53,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-26 19:57:53,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352040258] [2020-10-26 19:57:53,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:57:53,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:57:53,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282471796] [2020-10-26 19:57:53,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:57:53,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:57:53,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:57:53,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:57:53,297 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand 14 states. [2020-10-26 19:57:54,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:57:54,280 INFO L93 Difference]: Finished difference Result 250 states and 275 transitions. [2020-10-26 19:57:54,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:57:54,282 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-26 19:57:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:57:54,283 INFO L225 Difference]: With dead ends: 250 [2020-10-26 19:57:54,283 INFO L226 Difference]: Without dead ends: 194 [2020-10-26 19:57:54,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:57:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-26 19:57:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 167. [2020-10-26 19:57:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-26 19:57:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 179 transitions. [2020-10-26 19:57:54,324 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 179 transitions. Word has length 55 [2020-10-26 19:57:54,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:57:54,324 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 179 transitions. [2020-10-26 19:57:54,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:57:54,325 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 179 transitions. [2020-10-26 19:57:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:57:54,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:57:54,326 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 19:57:54,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:57:54,326 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:57:54,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:57:54,327 INFO L82 PathProgramCache]: Analyzing trace with hash -785720982, now seen corresponding path program 3 times [2020-10-26 19:57:54,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:57:54,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170263319] [2020-10-26 19:57:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:57:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:57:54,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:54,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:55,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:55,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:56,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:58,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:57:59,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:57:59,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:57:59,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:57:59,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:57:59,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:57:59,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:57:59,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:57:59,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 19:57:59,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:57:59,983 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2020-10-26 19:58:00,169 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2020-10-26 19:58:00,333 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-26 19:58:00,725 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-26 19:58:00,898 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-26 19:58:01,115 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2020-10-26 19:58:02,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:58:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:02,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:02,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:02,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:58:02,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:58:02,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:58:02,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:02,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:58:02,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:58:02,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:58:02,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:02,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:58:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:02,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:02,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:02,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:58:02,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:58:02,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:58:02,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:02,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:58:02,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:58:02,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:58:02,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:02,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:58:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:02,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:02,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:02,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:58:02,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:58:02,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:58:02,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:02,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:58:02,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:58:02,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:58:02,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:58:02,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170263319] [2020-10-26 19:58:02,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:58:02,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:58:02,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737725902] [2020-10-26 19:58:02,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:58:02,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:58:02,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:58:02,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:58:02,142 INFO L87 Difference]: Start difference. First operand 167 states and 179 transitions. Second operand 29 states. [2020-10-26 19:58:02,472 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-26 19:58:02,994 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2020-10-26 19:58:03,520 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-10-26 19:58:03,704 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-26 19:58:04,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:58:04,947 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2020-10-26 19:58:04,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:58:04,948 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 61 [2020-10-26 19:58:04,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:58:04,949 INFO L225 Difference]: With dead ends: 170 [2020-10-26 19:58:04,949 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:58:04,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:58:04,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:58:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-26 19:58:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:58:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2020-10-26 19:58:04,972 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 61 [2020-10-26 19:58:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:58:04,972 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2020-10-26 19:58:04,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:58:04,973 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2020-10-26 19:58:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:58:04,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:58:04,973 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-10-26 19:58:04,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:58:04,973 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:58:04,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:58:04,974 INFO L82 PathProgramCache]: Analyzing trace with hash 694225638, now seen corresponding path program 12 times [2020-10-26 19:58:04,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:58:04,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568956187] [2020-10-26 19:58:04,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:58:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:05,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:05,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:05,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:10,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:10,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:58:10,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:58:10,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:58:10,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:10,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:58:10,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:58:10,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:58:10,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:10,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:58:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:10,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:10,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:10,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:58:10,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:58:10,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:58:10,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:10,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:58:10,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:58:10,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:58:10,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-26 19:58:10,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568956187] [2020-10-26 19:58:10,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:58:10,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:58:10,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095060323] [2020-10-26 19:58:10,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:58:10,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:58:10,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:58:10,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:58:10,194 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand 14 states. [2020-10-26 19:58:11,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:58:11,360 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2020-10-26 19:58:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:58:11,361 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-26 19:58:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:58:11,362 INFO L225 Difference]: With dead ends: 188 [2020-10-26 19:58:11,362 INFO L226 Difference]: Without dead ends: 139 [2020-10-26 19:58:11,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:58:11,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-26 19:58:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2020-10-26 19:58:11,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:58:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 126 transitions. [2020-10-26 19:58:11,386 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 126 transitions. Word has length 59 [2020-10-26 19:58:11,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:58:11,387 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 126 transitions. [2020-10-26 19:58:11,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:58:11,387 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 126 transitions. [2020-10-26 19:58:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:58:11,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:58:11,388 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-26 19:58:11,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:58:11,388 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:58:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:58:11,389 INFO L82 PathProgramCache]: Analyzing trace with hash -363220535, now seen corresponding path program 4 times [2020-10-26 19:58:11,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:58:11,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378120661] [2020-10-26 19:58:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:58:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:11,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:12,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:13,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:15,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:16,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:16,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:58:16,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:58:16,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:58:16,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:16,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:58:16,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:58:16,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 19:58:16,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:17,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:58:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:17,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:17,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:17,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:58:17,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:58:17,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:58:17,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:17,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:58:17,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:58:17,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:58:17,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:17,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:58:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:17,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:17,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:17,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:58:17,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:58:17,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:58:17,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:17,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:58:17,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:58:17,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:58:17,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 19:58:17,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378120661] [2020-10-26 19:58:17,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:58:17,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:58:17,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870444036] [2020-10-26 19:58:17,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:58:17,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:58:17,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:58:17,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:58:17,841 INFO L87 Difference]: Start difference. First operand 119 states and 126 transitions. Second operand 25 states. [2020-10-26 19:58:19,454 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-26 19:58:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:58:20,941 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-10-26 19:58:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:58:20,942 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-26 19:58:20,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:58:20,944 INFO L225 Difference]: With dead ends: 143 [2020-10-26 19:58:20,944 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:58:20,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:58:20,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:58:20,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2020-10-26 19:58:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-26 19:58:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2020-10-26 19:58:20,965 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 61 [2020-10-26 19:58:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:58:20,965 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2020-10-26 19:58:20,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:58:20,966 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2020-10-26 19:58:20,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:58:20,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:58:20,966 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:58:20,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:58:20,966 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:58:20,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:58:20,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1423640280, now seen corresponding path program 13 times [2020-10-26 19:58:20,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:58:20,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297537284] [2020-10-26 19:58:20,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:58:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:21,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:22,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:26,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:26,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:58:26,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:58:26,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:58:26,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:26,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:58:26,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:58:26,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-26 19:58:26,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:28,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:58:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:28,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:28,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:28,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:58:28,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:58:28,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:58:28,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:28,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:58:28,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:58:28,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:58:28,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:58:28,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297537284] [2020-10-26 19:58:28,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:58:28,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:58:28,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703837356] [2020-10-26 19:58:28,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:58:28,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:58:28,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:58:28,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:58:28,060 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand 26 states. [2020-10-26 19:58:30,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:58:30,583 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2020-10-26 19:58:30,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:58:30,584 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2020-10-26 19:58:30,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:58:30,586 INFO L225 Difference]: With dead ends: 166 [2020-10-26 19:58:30,586 INFO L226 Difference]: Without dead ends: 163 [2020-10-26 19:58:30,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:58:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-26 19:58:30,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 144. [2020-10-26 19:58:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-26 19:58:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2020-10-26 19:58:30,619 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 61 [2020-10-26 19:58:30,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:58:30,619 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2020-10-26 19:58:30,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:58:30,619 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2020-10-26 19:58:30,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:58:30,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:58:30,620 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:58:30,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:58:30,621 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:58:30,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:58:30,621 INFO L82 PathProgramCache]: Analyzing trace with hash 596166314, now seen corresponding path program 14 times [2020-10-26 19:58:30,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:58:30,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884625682] [2020-10-26 19:58:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:58:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:30,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:30,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:32,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:35,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:35,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:58:35,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:58:35,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5127 [2020-10-26 19:58:35,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:35,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:58:35,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:58:35,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:58:35,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:35,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:58:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:36,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:36,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:36,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:58:36,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:58:36,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:58:36,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:36,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:58:36,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:58:36,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:58:36,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-26 19:58:36,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884625682] [2020-10-26 19:58:36,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:58:36,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:58:36,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863066717] [2020-10-26 19:58:36,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:58:36,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:58:36,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:58:36,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:58:36,026 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand 16 states. [2020-10-26 19:58:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:58:37,293 INFO L93 Difference]: Finished difference Result 290 states and 318 transitions. [2020-10-26 19:58:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:58:37,295 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-26 19:58:37,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:58:37,298 INFO L225 Difference]: With dead ends: 290 [2020-10-26 19:58:37,298 INFO L226 Difference]: Without dead ends: 228 [2020-10-26 19:58:37,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:58:37,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-26 19:58:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 197. [2020-10-26 19:58:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-26 19:58:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 211 transitions. [2020-10-26 19:58:37,348 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 211 transitions. Word has length 63 [2020-10-26 19:58:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:58:37,348 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 211 transitions. [2020-10-26 19:58:37,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:58:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 211 transitions. [2020-10-26 19:58:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:58:37,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:58:37,350 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-10-26 19:58:37,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:58:37,350 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:58:37,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:58:37,351 INFO L82 PathProgramCache]: Analyzing trace with hash -160429070, now seen corresponding path program 5 times [2020-10-26 19:58:37,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:58:37,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580468877] [2020-10-26 19:58:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:58:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:37,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:38,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:38,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:39,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:41,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:42,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:42,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:58:42,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:58:42,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:58:42,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:42,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:58:42,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:58:42,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-26 19:58:42,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:45,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:58:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:45,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:45,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:45,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:58:45,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:58:45,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:58:45,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:45,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:58:45,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:58:45,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:58:45,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:45,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:58:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:45,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:45,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:45,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:58:45,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:58:45,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:58:45,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:45,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:58:45,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:58:45,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:58:45,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:45,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:58:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:45,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:45,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:45,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:58:45,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:58:45,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:58:45,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:45,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:58:45,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:58:45,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:58:45,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 62 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:58:45,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580468877] [2020-10-26 19:58:45,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:58:45,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:58:45,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093435939] [2020-10-26 19:58:45,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:58:45,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:58:45,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:58:45,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:58:45,155 INFO L87 Difference]: Start difference. First operand 197 states and 211 transitions. Second operand 34 states. [2020-10-26 19:58:46,037 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-26 19:58:46,677 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2020-10-26 19:58:46,874 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2020-10-26 19:58:47,063 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-26 19:58:47,391 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 42 [2020-10-26 19:58:47,593 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2020-10-26 19:58:47,850 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-26 19:58:48,584 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-26 19:58:49,329 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-26 19:58:50,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:58:50,299 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2020-10-26 19:58:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:58:50,299 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 69 [2020-10-26 19:58:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:58:50,301 INFO L225 Difference]: With dead ends: 204 [2020-10-26 19:58:50,301 INFO L226 Difference]: Without dead ends: 199 [2020-10-26 19:58:50,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=512, Invalid=2910, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:58:50,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-26 19:58:50,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-10-26 19:58:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-26 19:58:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 212 transitions. [2020-10-26 19:58:50,342 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 212 transitions. Word has length 69 [2020-10-26 19:58:50,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:58:50,343 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 212 transitions. [2020-10-26 19:58:50,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:58:50,343 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 212 transitions. [2020-10-26 19:58:50,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:58:50,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:58:50,344 INFO L422 BasicCegarLoop]: trace histogram [6, 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] [2020-10-26 19:58:50,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:58:50,344 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:58:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:58:50,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1595309934, now seen corresponding path program 15 times [2020-10-26 19:58:50,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:58:50,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703828129] [2020-10-26 19:58:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:58:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:50,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:50,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:50,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:55,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:55,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:58:55,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:58:55,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 19:58:55,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:55,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:58:55,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:58:55,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:58:55,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:55,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:58:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:55,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:55,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:58:55,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:58:55,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:58:55,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:58:55,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:58:55,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:58:55,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:58:55,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:58:55,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:58:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-26 19:58:55,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703828129] [2020-10-26 19:58:55,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:58:55,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:58:55,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549960322] [2020-10-26 19:58:55,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:58:55,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:58:55,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:58:55,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:58:55,724 INFO L87 Difference]: Start difference. First operand 199 states and 212 transitions. Second operand 16 states. [2020-10-26 19:58:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:58:57,755 INFO L93 Difference]: Finished difference Result 277 states and 296 transitions. [2020-10-26 19:58:57,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:58:57,757 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-26 19:58:57,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:58:57,759 INFO L225 Difference]: With dead ends: 277 [2020-10-26 19:58:57,759 INFO L226 Difference]: Without dead ends: 220 [2020-10-26 19:58:57,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:58:57,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-26 19:58:57,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 196. [2020-10-26 19:58:57,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-26 19:58:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 205 transitions. [2020-10-26 19:58:57,809 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 205 transitions. Word has length 67 [2020-10-26 19:58:57,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:58:57,809 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 205 transitions. [2020-10-26 19:58:57,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:58:57,809 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 205 transitions. [2020-10-26 19:58:57,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:58:57,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:58:57,811 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-26 19:58:57,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:58:57,811 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:58:57,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:58:57,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1133935535, now seen corresponding path program 6 times [2020-10-26 19:58:57,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:58:57,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614420255] [2020-10-26 19:58:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:58:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:58:57,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:58:59,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:00,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:03,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:03,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:59:03,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:59:03,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5608 [2020-10-26 19:59:03,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:03,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:59:03,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:59:03,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 19:59:03,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:59:04,998 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-26 19:59:05,408 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 67 [2020-10-26 19:59:05,890 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 73 [2020-10-26 19:59:06,364 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 74 [2020-10-26 19:59:06,581 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-10-26 19:59:06,954 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 81 [2020-10-26 19:59:07,671 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 68 [2020-10-26 19:59:08,589 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 79 [2020-10-26 19:59:09,122 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 82 [2020-10-26 19:59:09,652 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 78 [2020-10-26 19:59:10,208 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 83 [2020-10-26 19:59:10,724 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 77 [2020-10-26 19:59:11,330 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 85 [2020-10-26 19:59:11,942 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 84 [2020-10-26 19:59:12,602 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 80 [2020-10-26 19:59:13,035 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 73 [2020-10-26 19:59:13,584 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 86 [2020-10-26 19:59:14,196 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 84 [2020-10-26 19:59:14,713 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 79 [2020-10-26 19:59:15,180 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 72 [2020-10-26 19:59:15,661 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 68 [2020-10-26 19:59:16,114 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 61 [2020-10-26 19:59:16,521 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 45 [2020-10-26 19:59:16,856 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 34 [2020-10-26 19:59:17,175 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 34 [2020-10-26 19:59:18,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:59:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:18,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:18,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:18,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:59:18,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:18,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:59:18,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:59:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:59:18,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:59:18,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:59:18,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:59:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:18,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:18,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:18,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:59:18,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:18,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:59:18,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:18,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:59:18,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:59:18,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:59:18,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:59:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:59:18,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614420255] [2020-10-26 19:59:18,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:59:18,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:59:18,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255742008] [2020-10-26 19:59:18,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:59:18,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:59:18,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:59:18,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1807, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:59:18,202 INFO L87 Difference]: Start difference. First operand 196 states and 205 transitions. Second operand 45 states. [2020-10-26 19:59:18,723 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 61 [2020-10-26 19:59:19,079 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 74 [2020-10-26 19:59:20,921 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 243 DAG size of output: 203 [2020-10-26 19:59:21,302 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 81 [2020-10-26 19:59:23,722 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 243 DAG size of output: 203 [2020-10-26 19:59:24,214 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2020-10-26 19:59:24,712 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 49 [2020-10-26 19:59:25,088 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-10-26 19:59:25,456 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2020-10-26 19:59:25,964 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2020-10-26 19:59:26,434 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2020-10-26 19:59:26,887 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2020-10-26 19:59:32,039 WARN L193 SmtUtils]: Spent 4.92 s on a formula simplification. DAG size of input: 294 DAG size of output: 212 [2020-10-26 19:59:32,332 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 67 [2020-10-26 19:59:32,656 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-26 19:59:33,038 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 75 [2020-10-26 19:59:34,034 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 105 [2020-10-26 19:59:34,488 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 92 [2020-10-26 19:59:35,955 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 189 DAG size of output: 120 [2020-10-26 19:59:41,355 WARN L193 SmtUtils]: Spent 5.13 s on a formula simplification. DAG size of input: 294 DAG size of output: 211 [2020-10-26 19:59:42,415 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 124 [2020-10-26 19:59:43,278 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 124 [2020-10-26 19:59:44,341 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 123 [2020-10-26 19:59:44,934 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 104 [2020-10-26 19:59:45,564 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 113 [2020-10-26 19:59:49,519 WARN L193 SmtUtils]: Spent 3.71 s on a formula simplification. DAG size of input: 260 DAG size of output: 155 [2020-10-26 19:59:49,800 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-10-26 19:59:50,947 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 112 [2020-10-26 19:59:52,429 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 189 DAG size of output: 123 [2020-10-26 19:59:52,782 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-26 19:59:53,825 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 100 [2020-10-26 19:59:54,221 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81